Katalog Vbs 2012 Connection and Fastening En

VBS | Catalogue 2012/2013

Connection andfastening systems

THINK CONNECTED.

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Welcome to Customer Service

Service telephone: +49 (0)2373 89-1500

Telefax for enquiries: +49 (0)2373 89-7777

Telefax for orders: +49 (0)2373 89-7755

E-mail: [email protected]

Internet: www.obo.de

Use the direct line to OBO Customer Service! On the Service Hotline +49 (0)2373 891 500, we are available everyday from 7.30 a.m.to 5.00 p.m.for any questions about the OBO product range for electrical installations. The newlystructured OBO Customer Services can offer you the full works: Competent contacts from your region All the information on the OBO product range Knowledgeable advice on special application topics Quick, direct access to all the technical data of the OBO products we also want to provide the best in customer

relations!

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Planning aid 5

Junction box systems 161

Concealed and cavity wall systems 191

Terminal systems 203

Cable fastening systems, plastic 211

Cable fastening systems, brass 245

Cable and pipe fastening systems, plastic 267

Cable and pipe fastening systems, metal 287

Cable and pipe fastening, special 311

Pipe systems 325

Beam clamp systems 337

Rail systems 351

U clamp systems 393

Screw-in and knock-in systems 419

Directories 439

Contents

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OBO VBS seminars: First-handknowledgeWith a comprehensive programmeof training courses and seminars onthe subject of connection and fasten-ing systems, OBO is able to supportits customers with specialist knowl-edge from a single source. Along-side the basic theoretical principles,the programme also deals with prac-tical implementation in everyday ap-plications. Special calculation andapplication examples round off thecomprehensive programme ofknowledge transfer.

Invitations to tender, product infor-mation and datasheetsWe can make life easier for you, withour comprehensive selection of ma-terials designed for practical applica-tions, which provide you with effec-tive support with the planning andcalculation of a project. These in-clude: Invitations to tender Product information Information sheets DatasheetsThese documents are continually up-dated and can be downloaded at nocharge at any time from the Internetdownload area atwww.obo.de.

Invitations to tender on the Internetat www.ausschreiben.deMore than 10,000 entries from theKTS, BSS, TBS, LFS, EGS and UFSranges can be called up free ofcharge. Regular updates and expan-sions mean that you always have acomprehensive overview of the OBOproducts. All the current file formats PDF, DOC, GAEB, HTML, TEXT,XML, NORM are available.www.ausschreiben.de

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General planning aid 5

Junction box systems 33

Concealed and cavity wall systems 55

Terminal systems 63

Cable fastening systems 69

Cable and pipe fastening, plastic 79

Cable and pipe fastening, metal 95

Cable and pipe fastening, special 107

Pipe systems 113

Beam clamp systems 123

Rail systems 129

U clamp systems 137

Screw-in and knock-in systems 143

Additional information 150

Planning and mounting aids

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Contact corrosion

Contact corrosion between two dif-ferent metals poses a considerablerisk to the load capacity and lifespanof the components used.

Height of the potential differenceThe level of contact corrosion is pri-marily determined by the level of thepotential difference between the con-tact partners. Contact corrosion oc-curs at potential differences of 100mV or greater and the anodic (elec-trically negative) partner is at risk ofcorrosion. Therefore, strongly non-precious metals should never bebrought into contact with preciousmetals.

Additional contact corrosion crite-ria Level of electrical resistance be-

tween the contact partners. Thehigher the resistance, the lowerthe contact corrosion. Positiveon Al and Ti.

Occurrence of an electrolyte. Anelectrolyte, such as perspirationor condensate attacks the pro-tective layers, increasing con-ductivity. Dirt increases this ef-fect through released ions.

Length of the impact of the elec-trolyte. The longer the electrolyteis at the work, the greater thecorrosion will be.

The surface ratios of the contactpartners influence the currentdensity. The best thing to haveis a small surface ratio of the"precious" to the "less precious"contact partner.

Potential difference

Normal potential Practical voltage series, water pH 6 Practical voltage series, artifi-cial Sea water pH 7.5

Metal mV Metal mV Metal mV

Copper +340 Titanium 136 Nickel 1

Lead -126 Brass MS 63 100 Brass MS 63 32

Tin -140 Copper 94 Copper -35

Nickel -230 Nickel 73 RF steel 1.4301 -90

Iron -440 RF steel -129 Titanium -156

Zinc -763 Aluminium -214 Lead -304

Titanium -1630 Hard chromium -294 Hard chromium -336

Aluminium -1660 Tin 98 -320 Steel -380

Magnesium -2370 Lead 99.9 -328 Aluminium -712

Steel -395

Zinc -852

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Contact corrosion

Land climate

Material component (large) Material construc-tion element (small)

OBO designation Basic materialCoating

FT VA AL CU MSZa-mak

Steel, galvanised(FT, FS, DD, G)

DD11/Zn, S234(St37)/Zn, ST4-2/Zn,St500-2/Zn, StW22/Zn, DX51D/Zn

0 0 0 2 1 0

Stainless steelV2A, V4A, V5A

1.4301, 1.4310, 1.4401, 1.4404,1.4571, 1.4529

0 0 1 1 1 0

AluminiumAl AlMg3, AlMgSi0.5 0 0 0 2 1 0

CopperCu

E-Cu S7, F24, Se-Cu(2.0070), SF-CuF24, St50-2

1 1 1 0 1 2

Brass Ms1 CuZn39Pb3, CuZn40Pb2 0 1 1 1 0 2

Brass MS2 CuZn37 0 2 1 1 0 2

Die-cast zincZamakZnAlCu1

Z410(GD-ZnAl4Cu1) 1 1 0 3 1 0

Legend0 No risk for contact corrosion1 Low risk2 Risk in case of small area ration (area of non-precious metal / area of precious metal)3 High risk

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Contact corrosion

Industrial atmosphere






0 0 1 3 2 0


1.4301, 1.4310, 1.4401, 1.4404,1.4571, 1.4529

0 0 1 1 1 0


CopperCu


2 2 3 0 1 2


Brass MS2 CuZn37 1 1 3 1 0 1


Z410(GD-ZnAl4Cu1) 0 0 0 3 2 0


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Contact corrosion

Sea climate






0 1 3 3 2 1


1.4301, 1.4310, 1.4401, 1.4404,1.4571, 1.4529

1 0 3 1 1 0


CopperCu


2 2 3 0 1 2


Brass MS2 CuZn37 1 1 3 1 0 1


Z410(GD-ZnAl4Cu1) 0 0 0 3 2 2


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Surface testing and corrosion categories

Surface testing/salt spray mist testAll the system components mustshow sufficient resistance againstcorrosion in agreement with the KTSstandard, DIN EN 61537. The mini-mum zinc layer thicknesses are de-termined through a measurement.The grouping into the appropriateclass is located at the right of the ta-ble. The top of the table shows thearea of application and the zinc lossto be expected according to DIN ENISO 12944.

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Surface testing and corrosion categories

Corrosion categories to DIN EN ISO 12944Corrosioncategory Typical environment, inside Typical environment, outside

Corrosionload

Averagezinc loss

C 1Heated buildings with neutral atmospheres,e.g. offices, shops, schools, hotels

- Insignificant

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Surfaces for use in internal areas

Whether indoors or outdoors, in ag-gressive atmospheres or under spe-cial hygienic conditions: OBO can of-fer the perfect surface and materialsfor your connection and fasteningsystem, no matter what the require-ments may be. OBO connection andfastening systems are machinedfrom high-quality sheet steel or steelwire and are available with varioussurfaces. Different hardening andcoating methods ensure tailor-madecorrosion protection, specially tai-lored to the appropriate application.In addition, OBO connection and fas-tening systems are available in stain-less steel.

Indoor useFor applications in indoor areas,OBO can offer connection and fas-tening systems with galvanisation orstrip galvanisation. They are particu-larly suited to dry atmospheres with-out any impact from aggressive pol-lutants.

Electro-galvanisation Electrolytic galvanisation in ac-

cordance with DIN EN 12329 Average coating thickness ap-

prox. 2.510 m According to RoHS guidelineComponents: profile rails, clampclips and small parts such as bolts,washers and nuts.

Strip galvanisation Hot-dip galvanised according to

the strip-galvanising method inaccordance with DIN EN 10346(formerly DIN EN 10327)

Average coating thickness ap-prox. 20 m

Joints in the metal are protectedby cathodic corrosion protectionup to a thickness of 2.0 mm

Components: metal products suchas profile rails and mounting compo-nents.

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Surfaces for use in external areas

Outdoor useOBO can offer versions with hot dipgalvanisation and double-dip gal-vanisation for outdoor and wet roomuse.

Hot-dip galvanisation Hot galvanisation using the dip-

ping method according to DINEN ISO 1461

Coating thickness to DIN ENISO 1461 approx. 4060 m

Any interfaces added at a laterdate must also be galvanised toprotect against corrosion

Components: Sheet steel productssuch as cable trays and weldedcomponents such as supports andbrackets

Double-dip galvanisation Hot dipping with zinc-aluminium

coating in accordance with DINEN 10327

Average coating thickness ap-prox. 23 m

Joints in the metal are protectedby cathodic corrosion protectionup to a thickness of 2.0 mm

Components: Metal products suchas covers, barrier strips andpunched parts

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Surfaces for use in tunnels, food or chemical industries

Applications: Tunnel construction,food or chemical industriesThere are also OBO stainless steelsystems for special hygiene andquality requirements for special vis-ual criteria for open wiring.

SS304 stainless steel OBO Code: V2A European material number:

1.4301 American material designation:

304 Welded components are addi-

tionally passivated Unwelded components are

rinsed and degreasedComponents: V2A selection pro-gramme with the title "V2A stainlesssteel systems"

V4A stainless steel OBO Code: V4A European material number:

1.4571 American material designation:

316 / 316 T Welded components are addi-

tionally passivated Unwelded components are

rinsed and degreasedComponents: V4A selection pro-gramme with the title "V4A stainlesssteel systems"

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15OBOVBS

Surfaces for special visual requirements or special environmental loads

Applications with specific opticalrequirements or special environ-mental conditionsColour-coated cable support sys-tems are becoming ever more popu-lar. The coating may be required foroptical reasons or for reasons ofcorrosion protection:

Colour coatings for reasons of cor-rosion protection Cable support system in FT (hot-

dip galvanised version) All RAL colours available Coating of the visible surfaces

and/or the complete system Suitable for the colour of the

structure when routed openly Separation of different voltages/-

functions (e.g. blue 230/400 Vpower supply; red weak currentsuch as telephone line and IT)

Colour-coated systems are not indi-cated specially in this catalogue.You can obtain details for these sys-tems by contacting our telephonehotline on +49 (0)2373 89-1500.

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UV and weather resistance

Protected and unprotected instal-lations outdoors

Outdoor installations should alwaysbe viewed particularly critically withregard to the mounting locationsand the selection of the installationmaterials. It is important to includethe environment conditions and influ-ences in the product selection in ad-vance.

UV and weather resistance for out-door installationsBesides UV radiation, installationsoutdoors must also take other envi-ronmental influences into account.Here, it is necessary to determinethe exact environmental conditions.Factors such as maximum tempera-tures, regularity of (extreme) temper-ature changes, humidity and the lo-cation of use/ mounting (housing, in-dustry, town, region, continent) allhave their role to play here. Theproblem is that there is no standard-ised testing method for the resis-tance of installation materials underdifferent environmental influences.Therefore outdoor installations neardumps, chemical or petrochemicalplants, sewage plants, etc. must begiven special attention before mount-ing.

Caution!!!All the T series boxes are UV-resis-tant.

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17OBOVBS

Labelling of halogen-free materials

Halogen-free installation materialsEvents such as the fire at DsseldorfAirport, in which people were killedby the extreme smoke development,have made us more sensitive, notjust to the areas of function mainte-nance and fire protection systems,but also to standard installation ma-terials. The result is the increasingdemand for halogen-free plastics.Halogen-free installation should/-must always be used in public areas(emergency routes, lifts, etc). Thechemical composition of these halo-gen-free systems is designed insuch a ways that, in the case of fire,they produce less hazardous (toxic/-corrosive) gases, which could com-bine with extinguishing agents toform hydrochloric acid. In the senseof the standard DIN VDE 0472, thismeans that materials are consideredhalogen-free when "the proportionsof the halogens chlorine, bromineand iodine are 0.2% for chlorineand 0.1% for fluorine". The DIN-VDE specification does not explicitlyrequire halogen-free installation sys-tems as yet, but OBO Bettermanncan, nevertheless, offer a wide rangeof halogen-free articles. This meansthat, if there is a fire, the risk to peo-

ple and property can be reduced toa minimum.

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Function maintenance for electrical systems

Safety in case of fire

A lot of people, a lot of safetyFunction maintenance is particularlyimportant in buildings regularly fre-quented by large numbers of peo-ple. These include public buildingssuch as schools, hospitals, meetingplaces, civic buildings and under-ground stations, but also industrialplants, high-rise buildings, shoppingcentres and large car parks.

30 minutes: Function maintenancefor an evacuation

The first 30 minutes after the start ofa fire are decisive when clearing theaffected building. During this time,function maintenance must be guar-anteed for the following units: Safety lighting systems Lifts with fire control Fire alarm systems Alarm systems and systems to

issue instructions to visitors andemployees

Fire extraction systems

90 minutes: Function maintenancefor improved fire-fightingTo support fire-fighting operations, itis imperative that certain technicalequipment is supplied with sufficientpower even up to 90 minutes after afire breaks out in a building. Thisequipment includes: Systems to increase the pres-

sure of the water for fighting thefire

Mechanical smoke extractionand smoke protection pressuresystems

Fire brigade lifts, bed lifts in hos-pitals

Individual laying systemsWith the individual laying systems,OBO Bettermann can offer a rangeof practical, flexible mounting op-tions for electrical installations withfunction maintenance. The systemsare suited to vertical and horizontalinstallation and are approved for thefire protection classes E30 and E90.Standardised supporting construc-tions as defined in the testing stan-dard, DIN 4102 Part 12, include:The laying of cables with individualclips and the laying of cables withprofile rails, clamp clips and a longtrough.

Fire loads of installation systemsAccording to the valid MLAR, thereis no longer a need to specify thefire loads for electrical installations inemergency and escape routes, as afire load of 0 kWh is always re-quired.

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Function maintenance for electrical systems

Maintain the function!To ensure that emergency and es-cape routes and important technicalequipment such as emergency light-ing, fire alarm systems and smokeexhaust systems remain usable incase of fire, it is absolutely essentialto provide special protection for thepower supply for these systems. Theuse of special cables and laying sys-tems means that it is possible tomaintain the power supply, even inthe case of fire, thus guaranteeingthe function maintenance. You canfind detailed information on the sub-ject of fire protection in the OBOBSS fire protection catalogue.

Standard support type, clamp clip,type 2056Standard support construction con-sisting of clamp clip without longtrough for individual laying orbundling cables. Brief information: Wall or ceiling mounting Vertical or horizontal mounting Rail mounting: max. 0.3 m Anchor spacing in the rail: max.

0.25 m Individual cable assignment: di-

ameters of up to 100mm possi-ble

Assignment with bunched ca-bles: max. three cables withmax. diameter 25 mm

Cable tidy, cable-specific layingtypeCable-specific laying type with col-lective brackets for individual laying,mounting on wall or ceiling Brief in-formation:

Type 2031/M 15 Mounting distance: max. 0.5 m Cable assignment: max. 1.1

kg/m


kg/m


kg/m

Standard support type, clamp clip,type 732/733Standard support construction con-sisting of spacer clips for individuallaying or bundling cables. Brief infor-mation: Wall or ceiling mounting Vertical or horizontal mounting Mounting spacing: max. 0.3 m Individual cable assignment: di-

ameters of up to 50mm possi-ble

Assignment with bunched ca-bles: max. three cables withmax. diameter 25 mm

Pressure clip, cable-specific layingtypeCable-specific laying type for individ-ual laying, mounting on the ceiling.Brief information:

Type 2033 M Mounting distance: max. 0.5 m

Type 2034 M Mounting distance: max. 0.5 m

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Flame-resistance/fire-resistance

According to DIN EN 60695-2-11(VDE 0471 Part 2-11), electrical con-nection materials must be subjectedto a glow wire test, in order to evalu-ate the fire risk of the end product.End products, in the sense of the

standard, are electrical resourcesand modules and components.When the glow wire test is being car-ried out, a glowing wire (for tempera-ture, see table below) is inserted intothe component to be tested for a pe-

riod of 30 seconds and then re-moved. After 30 seconds at the lat-est, the object, if it has caught light,must have extinguished again, in or-der to specify the flame resistances.

Types of installation systems

Types of bodies on test Surface-mountedCon-cealed

Flush-mounted

Cavity wal-l/furniture

Concretestructure

Installa-tion duct

Testingtempera-tures in C

Connection sockets 650 650 750 850 650 750

Accessory sockets and device connection sockets 750 650 - 850 650 750

Ceiling lights, connection sockets 750 650 - 850 650 750

Wall light connection sockets 750 650 - 850 650 750

Device connection sockets 750 650 - 850 650 750

Connection sleeves 750 - - - - 750

Insulation sections, which support active parts 960 - - - - -

Cover for installation sockets 750 - - - - -

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21OBOVBS

VDE and CE marks

VDEThe VDE is the Association for Elec-trical, Electronic and InformationTechnologies, their study and thetechnologies and applications basedupon them. The VDE Testing andCertification Institute is a nationallyand internationally accredited insti-tute in the field of testing and certifi-cation of electro-technical devices,components and systems. Theseelectrical products are tested fortheir safety, electromagnetic compat-ibility and additional product proper-ties. Tests and certificates are impor-tant for consumer protection and forthe marketing of our products. As aneutral and independent institution,the VDE Testing and Certification In-stitute is a global partner for theelectrical engineering, electronicsand information technology indus-tries. All the relevant tests for the dif-ferent product properties are an-chored in the VDE.

CE symbol:Technical resources included in a le-gal ordinance, i.e. electrical re-sources, machines and safety com-ponents, must have a CE symbol,with which the manufacturer con-firms that the safety requirements ofthe ordinances are fulfilled. In addi-tion, there must also be a declara-tion of conformity and technical doc-umentation. The CE symbol is not amark of quality, but simply a declara-tion by the manufacturer that theyhave complied with the legal require-ments and the codes of practice.

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IP protection rating

IP protection ratingThe IP protection rating specifieshow far a component is protectedagainst contact and foreign bodiesand the ingress of water. The IP pro-tection ratings are controlled by thestandard DIN EN 60529 (VDE 0470Part 1). The IP is always made up oftwo digits.

The first digit (see table below)designates the contact and for-eign body protection. On theone hand, it specifies how far ahousing prevents access to dan-gerous parts, by preventing orlimiting the ingress of body partsor objects held by a person. Onthe other hand, it specifies howfar the housing protects the in-stalled resources against theingress of solid foreign bodies.

The second digit (see table onthe right) specifies the protectionagainst water. It specifies howfar the resource is protectedagainst incoming water and theresulting damage.

Protection ratingFirstcodedigit

Against access to the dangerous parts Against solid foreign bodies

0Protected against access to dangerous parts with the back of thehand

Not protected

1Protected against access to dangerous parts with a finger Protected against solid foreign bodies of 50

mm diameter and larger

2 Protected against access to dangerous parts with a toolProtected against solid foreign bodies of12.5 mm diameter and larger

3 Protected against access to dangerous parts with a wireProtected against solid foreign bodies of 2.5mm diameter and larger

4 Protected against access to dangerous parts with a wireProtected against solid foreign bodies of 1.0mm diameter and larger

5 Protected against access to dangerous parts with a wire Dust-protected

6 Protected against access to dangerous parts with a wire Dust-proof

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23OBOVBS

IP protection rating

Protection rating against the entry of water with a damaging impactSecondcode digit Short description Definition

0 Not protected -

1 Protected against water droplets Droplets falling vertically may have no damaging impact.

2Protected against water dropletswhen the housing is tilted to up to15.

Droplets falling vertically may not have a damaging impact, if the housing istilted to angle of 15 on either side of the vertical.

3 Protected against spray waterWater being sprayed at an angle of 60 on both sides of the vertical maynot have any damaging impact.

4 Protected against spray waterWater spraying the housing from any direction may not have any damagingimpact.

5 Protected against water jetsJets of water pointing at the housing from any direction may not have anydamaging impact.

6Protected against strong water jets Strong jets of water pointing at the housing from any direction may not have

any damaging impact.

7Protected against the effects of be-ing temporarily immersed in water

If the housing is sometimes underwater under standard pressure and timeconditions, then water may not enter in such volumes as would have a dam-aging impact.

8Protected against the effects of be-ing continuously immersed in wa-ter

If the housing is continuously underwater, then water may not enter in suchvolumes as would have a damaging impact and this shall be subject to con-ditions to be agreed between the manufacturer and the user. However, theconditions are more difficult to fulfil than for number 7.

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IPX9 protection rating

Besides the protection ratings ac-cording to IEC 60529 (DIN EN60529, VDE 0470-1:2000-09) "De-grees of protection provided by en-closures (IP code)", there are otherstandards, which describe the test-ing of the protection rating. Onesuch standard is ISO 20653:2005-08. This has been created more orless exactly from the German stan-

dard DIN 40050-9: 1993-05 "Roadvehicles; degrees of protection (IPcode); protection against foreign ob-jects; water and contact; electricalequipment".DIN 40050-9 is intended particularlyfor road vehicles, as installations areoften subjected to spray water here.But higher protection ratings are al-so required in electrical installations,

as, in many areas, cleaning with highpressure equipment is part of every-day work. Examples of this are in thefoods industry or in car washes. Ifsteam washers are also used, thenthe protection rating must also be ef-fective at increased temperatures.You can find a comparison of DIN50050 Part 9 and DIN EN 60529.

Comparison DIN 40050 Part 9 - DIN EN 60529DIN 40050 Part 9 DIN EN 60529 Meaning: protection against ingress of water

0 0 No protection

1 1 Protection against falling water droplets

2 2 Protection against falling water droplets when the housing is tilted to up to 15

3 3 Protection against falling spray water to up to 60 from the vertical

4 4 Protection against spray water from all sides

5 5 Protection against water jet from any angle

6 6 Protection against strong water jets

6K Protection against strong water jets under increased pressure, specific for road vehicles

7 7 Protection against temporary submersion

8 8 Protection against continuous submersion

9Protection against water during high pressure and steam cleaning, specifically for road ve-hicles

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IK code

IK codeThe IK code to DIN EN 50102 indi-cates the protection rating of hous-ing against external mechanicalloads. It is made up of the code let-ters IK and a two-digit number from00 to 10. Each group of numbersstands for a load energy value inJoules (J). The IK code always ap-plies to the complete housing, whichguarantees the protection of re-sources against the damaging ef-fects of mechanical loads. The hous-ings are tested by knocking themwith different testing hammers.

IK code 00 01 02 03 04 05 06 07 08 09 10

Stress energy value [J] - 015 020 035 0.50 0.70 1 2 5 10 20

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Protection classes of electrical resources

Protection classes according toVDE 0140Protection classes of electrical re-sourcesDIN VDE 0140 defines the protec-tion classes as follows: Protection class I: Resources

with protective conduction con-nection (protection measurethrough protective conductorconnection on housing)

Protection class II: Resourceswith protective insulation (protec-tion measure through insulation)

Protection class III: Resourcewith protective low voltage(SELV-PELV, protection throughmeasured voltages max. 25/50V AC and max. 60/120 V DC)

Empty plastic housings correspondto protection class II, housings madeof metal/metal plating must be in-tended for the connection of a pro-tection conductor and thus meetprotection class I.

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27OBOVBS

Labelling of electrical resources

Explanations from the standard

Electrical designationsWhen using junction boxes, connec-tion sockets and connection termi-nals, the resources are assignednominal values, as defined in VDE0100 Part 200. In the designation, adistinction is made between themaximum approved voltage (nomi-nal voltage), the maximum approvedcurrent (nominal current) and themaximum approved cross-section(nominal cross-section of the cablesto be connected).

Nominal cross-sectionLargest tested-approved cross-sec-tion of the cable to be connected.

Rated currentLargest approved current at the con-nection point.

Rated voltageGreatest approved voltage at theconnection point.

Number of polesNumber of connection points of theclamp connector.

Number of entriesNumber of entries in an electricalconnection box or connection sock-et.

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Important information on the external dimension data

Cable diameter and space required; 1 = diameter in mm, 2 = space required in cm

Cable sizes, outer diameters PGand metric sizesThe term "cable" means a jacketedelectrical cable for the transmissionof electrical energy and data. Cablesare given according to their nominalcross-section. The external diameterand usable cross-section depend ontheir nominal cross-section and thenumber of individual wires combinedin the cable. Fastening clips are giv-en with their maximum span dis-tance as a nominal size in mm. Todetermine the correct fastening clipfor the component to be fastened,you can find the interplay betweenthe PG sizes and the metric data inthe table.

Calculation using the formula (2r)The diameter says little about the ac-tual space required by a cable. Cal-culate: (2r). This value reflects therealistic space requirements, includ-ing the compartments.

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Important information on the external dimension data

Cable diameter and space requiredExternal diameter in mm PG sizes External diameter in mm Metric sizes

12 PG 7 12.5 M 12

13 PG 7 12.5 M 12

15 PG 9 15.2 M 16

16 M 16

18 PG 11 18.6 M 16/M 20

19 PG 11 18.6 M 16/M 20

20 PG 13.5 20.4 M 20

21 PG 13.5 20.4 M 20/M 25

22 PG 16 22.5 M 20/M 25

23 PG 16 22.5 M 20/M 25

24 M 20/M 25

25 M 25

28 PG 21 28.3 M 25/M 32

32 M 32

37 PG 29 37 M 32/ M 40

40 M 40

47 PG 36 47 M 40/M 50

50 M 50

54 PG 42 54 M 50/M 63

59 PG 48 59.3 M 50/M 63

63 M 63

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How can I work out the volume of cables?

Insulated power cables

Type Diametermm

Usable cross-section cm

1 x 4 6.5 0.42

1 x 6 7 0.49

1 x 10 8 0.64

1 x 16 9.5 0.9

1 x 25 12.5 1.56

3 x 1.5 8.5 0.72

3 x 2.5 9.5 0.9

3 x 4 11 1.21

4 x 1.5 9 0.81

4 x 2.5 10.5 1.1

4 x 4 12.5 1.56

4 x 6 13.5 1.82

4 x 10 16.5 2.72

4 x 16 19 3.61

4 x 25 23.5 5.52

4 x 35 26 6.76

5 x 1.5 9.5 0.9

5 x 2.5 11 1.21

5 x 4 13.5 1.82

5 x 6 14.5 2.1

5 x 10 18 3.24

5 x 16 21.5 4.62

5 x 25 26 6.76

7 x 1.5 10.5 1.1

7 x 2.5 13 1.69

Insulated power cables

Type Diametermm


1 x 10 10.5 1.1

1 x 16 11.5 1.32

1 x 25 12.5 1.56

1 x 35 13.5 1.82

1 x 50 15.5 2.4

1 x 70 16.5 2.72

1 x 95 18.5 3.42

1 x 120 20.5 4.2

1 x 150 22.5 5.06

1 x 185 25 6.25

1 x 240 28 7.84

1 x 300 30 9

3 x 1.5 11.5 1.32

3 x 2.5 12.5 1.56

3 x 10 17.5 3.06

3 x 16 19.5 3.8

3 x 50 26 6.76

3 x 70 30 9

3 x 120 36 12.96

4 x 1.5 12.5 1.56

4 x 2.5 13.5 1.82

4 x 6 16.5 2.72

4 x 10 18.5 3.42

4 x 16 21.5 4.62

4 x 25 25.5 6.5

4 x 35 28 7.84

4 x 50 30 9

4 x 70 34 11.56

4 x 95 39 15.21

4 x 120 42 17.64

4 x 150 47 22

4 x 185 52 27

4 x 240 58 33.6

5 x 1.5 13.5 1.82

5 x 2.5 14.5 2.1

5 x 6 18.5 3.42

5 x 10 20.5 4.2

5 x 16 22.5 5.06

5 x 25 27.5 7.56

5 x 35 34 11.56

5 x 50 40 16

Telecommunications cables

TypeDiame-termm

Usablecross-section cm

2 x 2 x 0.6 5 0.25

4 x 2 x 0.6 5.5 0.3

6 x 2 x 0.6 6.5 0.42

10 x 2 x 0.6 7.5 0.56

20 x 2 x 0.6 9 0.81

40 x 2 x 0.6 11 1.12

60 x 2 x 0.6 13 1.69

100 x 2 x 0.6 17 2.89

200 x 2 x 0.6 23 5.29

2 x 2 x 0.8 6 0.36

4 x 2 x 0.8 7 0.49

6 x 2 x 0.8 8.5 0.72

10 x 2 x 0.8 9.5 0.9

20 x 2 x 0.8 13 1.69

40 x 2 x 0.8 16.5 2.72

60 x 2 x 0.8 20 4

100 x 2 x 0.8 25.5 6.5

200 x 2 x 0.8 32 10.24

IT cables Type Cat...

Type Diametermm


Cat. 5 8 0.64

Cat. 6 8 0.64

Coax cable (Standard)

Type Diametermm


SAT/BKcable

6.8 0.48

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32 OBO VBS

33OBOVBS

Planning aids, junction box systems

Information on the formation of condensation water 34

Planning aid for mounting junction boxes 35

Mounting aid, junction box, A series 36

Mounting aid, junction box, B 9/T 38

Mounting aid, junction box, T series 40

Mounting aid, junction box, T series with clamping piece 44

Mounting aid, junction box, B series with thread 46

Mounting aid, junction box, FireBox 48

Mounting aid, Aquasit casting compound 51

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Condensation water in housings

Condensation water in closedhousingsCondensation water in tightly closedhousings, such as junction boxes, isa particular problem during regularand strong temperature deviations.Temperature changes outside thehousing means that excess humidityin a very tightly closed junction boxcannot escape and it condenseswithin the housing. This creates theimpression that the housing is nottightly closed. If this humidity is notremoved, then, in the worst case, itmay cause damage to the electricalconnection. Therefore, try to avoidinstallations in areas with extremetemperature variations.

OBO junction boxes have pre-marked openings, which can beopened to minimise and even pre-vent the formation of condensationwater. The pre-marked 4mm open-ings are located on the base of thehousing. If the premarked openingsare pierced, then the change in tem-perature and humidity inside andoutside the housing takes place al-most at the same time. According toDIN VDE 010-520 Erection ofheavy current systems for rated volt-ages of up to 1,000 V "Measuresmust be taken to remove water, ifwater or water condensation can oc-cur within cable systems". In thecase of installation with high tight-ness requirements, alternative mea-surements may need to be taken.

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35OBOVBS

Mounting of junction boxes

Mounting junction boxes on com-bustible constructions or materialsThe VdS directive 2023 specifiesthat, on combustible substrates,electrical connections of cables car-rying voltage may only be made withterminals in suitable electrical instal-lation boxes according to DIN VDE0606. The housing must be closedto the mounting surface and fulfil therequirements of DIN VDE 0606.

Protected and unprotected installa-tion in damp and wet areas androoms and outdoor systemsIn damp and wet areas, such as inindustrial kitchens, laundries, coldrooms, etc. electrical resources musthave a protection rating of at least IPX1 (protected against water droplet-s).In areas in which water jets can beexpected, the resources must havea protection rating of at least IP X5(water jet protection) to protect elec-trical resources. DIN EN 60529 pro-vides detailed information on thenecessary protection ratings.With unprotected installations out-doors (DIN VDE 0100-737), such ason railway platforms, crane systems,external walls of buildings, etc., theresources used must meet the pro-tection rating IPX3. With protected in-stallations outdoors (DIN VDE 0100-737), such as in garage entrances,on buildings with an appropriate roofoverhang, etc., resources must haveat least the protection rating IPX1(protected against water droplets).

Comment: With installations out-doors, pollutants in the surroundingatmosphere may limit the suitabilityof the selected articles.

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Mounting aid, junction box, A series

The classic in installing wet-room junction boxes: the OBO A series made of halogen-free, thermoplastic material.Both internally and externally, the screwless, tight clamshell allows quick, safe mounting. The A series junction boxesare available with and without terminal strips. Besides the standard colour, light grey (RAL 7035) and the pure white(RAL 9010) variants for increased visual requirements, the red variant is available for signal cables such as telecom-munications cables or other signal state monitors. All the junction boxes are made of halogen-free material and areflame-resistant to VDE 0471/DIN IEC 695 Part 2-1, test temperature 750 C.

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37OBOVBS

Mounting aid, junction box, A series

A series application, wall mountingComplete mounting, A series with installationpipe and Quick clip.

Fastening the A seriesThe stable external fastenings mean that thejunction box can be installed quickly and easi-ly.

Cable entry, A seriesThe pre-marked cable entries can be openedwith a knife or, using the supplied insertionpoint, directly penetrated with the cable.

Insertion point applicationPlace the insertion point on the end of the wire.Push the cable with the point through the pre-marked entries.

Cover mounting, A seriesThe covers can be placed on the bases withoutthe need for tools.

Space for wiring workThe A series junction boxes offer sufficientspace for wiring with screw or screwless termi-nals.

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Mounting aid, junction box, B 9/T

The OBO B9/T junction box consists of two halogen-free, thermoplastic components: a soft one for the seal (membrane) in the cable entry a hard one for the housing.This two-component technology stands for perfect tightness and stability. The protection rating IP67 is thus achievedwhen the membrane is directly penetrated with cables. A cable gland for strain relief can also be inserted in thethreads pre-marked in side walls.The smooth external walls allow an arrangement of multiple junction boxes without spaces even with retroinstalla-tion. All the fastening dimensions are shown clearly on the back, allowing exact fastening.The B9/T is a universal problem-solver with virtually unlimited applications even in permanently wet environments.

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39OBOVBS

Mounting aid, junction box, B 9/T

B9T application, wall mountingJunction box available with 3-cap nut cablegland in set.

Fastening the B 9/TThe fastening holes in the floor area have asoft membrane, which fixes the fasteningscrews and maintains the protection rating.

Cable entryThe soft membrane of the B 9/T is just pushedthrough directly with the cable, without any ad-ditional tools.

Tightness of the cable entryThe membrane tightly seals the cable. The pro-tection rating remains intact.

Installation with V-TEC glandTorsion-protected and with strain relief: V-TECglands with a short thread offer a secure hold.

Installation with V-TEC glandThe V-TEC cable gland with short connectionthread is simply screwed into the available boxthread. The soft membrane need not be re-moved.

Earthing terminalThere is the option of mounting an earthing ter-minal in the junction box.

Cover mountingThe cover is placed on the base.

Cover mountingThe bolts are closed using a screwdriver.

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Mounting aid, junction box, T series

The T series from OBO is made from a halogen-free, thermoplastic material and is available in various coloured ver-sions. The T series has openings in the side walls which are closed with 4 to 24 cable plug-in seals (depending onthe size of the T box).Irrespective of their size, colour or equipment, all the junction boxes of the T series are made from UV-stabilised mate-rial.In addition, variants are available in a flame-resistant version for up 960 C and with a red signal cover. Cables canbe installed directly in the junction box through plug-in seals. The plug-in seals are flat and countersunk in the hous-ing, meaning that they do not protrude over the edge. This means that the junction boxes can be arranged withoutgaps.

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Mounting aid, junction box, T series

T 25 applicationInstallation with the round junction box T 25.

T 40 applicationInstallation with the smallest square junctionbox T 40.

T series cover with signal cableInstallation with a junction box T 60 with a redsignal cover.

Floor/wall fasteningThe junction boxes can be fastened throughtwo to four break-out openings in the base. Theopenings can be reclosed using cover caps.

Corner dome, wall fasteningFrom box size T 60, the junction boxes can bemounted on the substrate through the cornerdomes for cover fastening.

Fastening on mounting plateThere are two to four fastening domes integrat-ed in the base substrate for metal screws of3.5 x 9.5 mm, in order to fasten the box, e.g. toa mounting plate.

Plug-in sealsCables can be installed directly by pushingthrough without any aids.

Pipe push-in sealsWhen using pipes, the user can also use plug-in pipe seals. This allows the creation of aclosed installation.

Insertion opening / cable gland insertCable glands of type V-TEC VM can be insert-ed in the insertion opening, in order to createmechanical resistance and strain relief.

Cover captivityAll the lids are fastened captively in the box in-terior with a holding strap on the base.

Cover lockFrom size T 60, the cover is fastened to thebase with sash locks and can be opened orclosed by giving the lock a quarter-turn.

Cover seal / IP protection ratingJunction boxes of size T 60 or larger are fittedwith a foamed cover seal. This creates the highprotection rating of IP66.

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Terminal block fasteningAn earthing terminal can be attached to thecentral dome in the interior of the T 25 to T100 junction boxes.

Hat rail fasteningHat profile rails can be mounted in lengthwise,transverse or diagonal directions in the cablebox bases of sizes T 60 to T 350.

Use of screwless terminalsScrewless terminals are used for wiring "on thefly" for cross-sections of up to 2.5 mm.

T250 with terminal strips at topWired junction box T250 with terminal strips attop. Clear and easy-to-test wiring.

Cable entries for closed junction boxesWith the T boxes with closed side walls,stepped drills can be used to drill individualopenings. The high protection rating can bemaintained by using the EDK plug-in seals orV-TEC VM cable glands and locknuts.

Break-out openings in the baseThere are break-out openings in the box base,through which cables coming directly out of themounting substrate can be inserted in the junc-tion box.

T series cover with signal cableJunction boxes with covers in the red signalcolour are available for labelling safety-relevantcircuits.

Outdoor mounting of T seriesThe junction boxes of the T series with the UVaddition, can also be used in external areaswith direct sunlight penetration. Cables can berun through the plug-in seal without reducingthe protection rating.

Outdoor mounting of T series with cableglandsCable glands of type V-TEC VM can be used toprovide strain relief of the cables and also pro-tect them against twisting.

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Condensation waterWith tightly closing housings in external areas,it is important that any condensation water cre-ated is drained using the appropriate openings.This only applies to systems without increasedforeign body or moisture protection.

T series with strain relief entriesThe strain relief entries mean that installationcables can be inserted directly in the T Box.The special ribs protect the cable against unin-tentional withdrawal.

T series with Wieland socketsThe Wieland sockets, type GSt 18-i3, locked in-to the sides of the T-Box 100 WB, are pre-ter-minated and electrically connected. The sock-ets have different colour coding and can beused for different circuits.

T series with Modul 45 socketsThe T 100 MSD with pre-mounted and ready-wired sockets can be used in false ceilings forvariable wiring.

Fastening element on junction boxThe junction box is snapped onto the mesh ca-ble tray without tools using the previouslymounted fastening element.

Fastening element with junction box on themesh cable trayThe junction box can be fastened to a meshcable tray quickly, efficiently and without toolsin just a few actions. Installation can start afterjust the minimum of preparation time.

Fastening element with junction box on thecable trayThe junction box can be fastened to all stan-dard cable trays quickly, efficiently and withouttools in just a few actions. Installation can startafter just the minimum of preparation time. Theimage shows mounting without the slide lock.

Connect the fastening element with thejunction boxThe fastening element is snapped onto the rearside of the cable box mesh cable tray withouttools.

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Mounting aid, junction box, T series with clamping piece

The new T series terminal strips are child's play to mount in the junction box and require no tools. Positioning the ter-minal strips at the top edge of the junction box keeps wiring easy to follow and accessible at all times. The hat profilerails can be installed both lengthwise and transversely in junction boxes of size T100 and greater. Terminal strips oftype KL-T 06-16 and L-T 16-35 can be snapped onto standard hat profile rails. 5 terminal strips are required for nor-mal applications, as each terminal strip is one-pole. There are 4 terminal holes on each terminal strip. However, themodular structure means that it possible to use more or less than these 5 terminal strips at any time.The maximum number of terminal strips is specified by the size of the junction box. This means that it is possible tomount up to 12 terminal strips of type KL-T 06-16 in a T250 junction box.

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45OBOVBS

Mounting aid, junction box, T series with clamping piece

T250 with terminal stripThe earthing terminals can simply be snappedonto the hat profile rail fastened in the junctionbox.

T250 with terminal stripsFastening of the hat profile rail in the junctionbox by simply pushing into the existing railseats.

Snapping on of the terminal stripsThe terminal strips are attached to the innerside of the junction box and locked by applyingslight pressure to the outer side of the junctionbox.

T250 with terminal stripsIf the junction box is ordered with terminalstrips, then 2 hat profile rails and 5 terminalstrips are supplied.

T250 with terminal stripsIf the junction box is ordered with terminalstrips, 2 hat profile rails and 5 terminal stripsare supplied.

Terminal strip on mini hat profile railOne or more earthing terminals can be fas-tened on the mounted hat profile rail.

Fastening of the mini hat profile railThe hat profile rail is attached to the "dome" inthe base of the cable box.

Snapping on of the terminal stripThe individual terminal strips can simply besnapped onto the mini hat profile rail withouttools.

Terminal strip lengthwise in junction boxThe hat profile rails can be mounted both"lengthwise" and "across" in the junction box.The maximum number of terminals is depen-dent on the installation, the size of the junctionbox and the terminal strip used.

Terminal strip transverse in junction box5-pole wiring is also possible in the transversedirection.

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Mounting aid, junction box, B series with thread

For decades, the B series OBO junction boxes with threads have been a permanent component of the OBO Better-mann product range. They are made of Aminoplast. This plastic is hard and is highly resistant, meaning that the junc-tion boxes are very stiff and stable. The B series is particularly suitable for environments with extreme temperature de-viations. The required cable openings can be broken out at the appropriate points using a screwdriver. Cable glandscan be screwed directly into the openings in the side walls. This automatically provides strain relief for cables.

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47OBOVBS

Mounting aid, junction box, B series with thread

B series with thread application, wallmountingComplete mounting and installation of B11 withscrewed-in cone cable glands and pressureISO clips.

Wall mounting B11MThe junction boxes are mounted on the mount-ing substrate using the external fastening ele-ments.The break-out openings can be broken out us-ing a screwdriver or another suitable tool.

Mounting of cable glandCable glands can be screwed directly into thethread in the housing.

Cable installationThe cables are then be inserted into the junc-tion box through the cable glands. The IP pro-tection rating can thus be maintained.

Application with cone cable glandsAll kinds of cable glands can be inserted in thebreak-out openings. Twin cable glands can beused to insert two cables through an opening.

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48 OBO VBS

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Mounting aid, junction box, FireBox

There are ever higher requirements attached to the fire safety of installations in modern buildings. For these require-ments to be fulfilled safely, OBO can offer the FireBox made of Duroplast to extend or branch defined function main-tenance cables. With the FireBox series, OBO can complete its range for function maintenance systems for safety-rel-evant systems.The tested and approved types T 100 E and T 160 E will fulfil your requirements reliably and safely. All the compo-nents needed for mounting are included in the contents of the delivery: the cable junction boxes, four plug-in sealsand the connecting unit with two bolt ties.A unique highlight of the OBO FireBox is the fully pre-assembled connecting unit that is built to withstand high tem-peratures. As always, OBO has all the solutions for your needs and all from a single source.

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49OBOVBS

Installation principle FireBox junction box

System description

Routing type Duroplastic cable-specific connectionwith high temperature-resistant connection unit

Test certificate no. P-MPA-E-08-016

Function maintenance classes E30 to E90

Testing standard DIN 4102 Part 12

Approved data

Type Nominal wire cross-sections Nominal wire cross-sectionsDouble assignment

T100E 4-5 5 x 4 mm Max. 2 x 1.5 mm

T160E 10-5 5 x 10 mm Max. 2 x 4 mm

T160E 16-5 5 x 16 mm Max. 2 x 6 mm

T160E 4-8D Wire diameter 0.8 mm

The data in the general construction test certificates of the materials testing office of North Rhine-Westphalia, Erwitte,apply.

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Mounting aid, junction box, FireBox

Creating insertion openingsDrill the holes for V-TEC cable glands with astepped drill.

Mounting, cable glandsFastening of the V-TEC cable glands usinglocknuts.

Create fastening holesDrill base openings for wall fastening.

Mounting preparationsDraw on the drill holes for subsequent mount-ing.

Drill fastening holesDrilling diameter: 5 mm, 60 mm deep. Cleanthe drill holes well.

Mounting, connection unitFasten the bolt tie with seals directly in the sub-strate through the clamp and base of the junc-tion box.

Cable insertionStrip the cable ends and insert them into thejunction box through the cable gland.

Protective conductor terminalAlways place the protective conductor on thegreen-yellow PE terminal. Try to avoid wirecross-overs.

Clip spacingMaximum clip spacing in front of the junctionbox 100 mm, in order to prevent sagging incase of fire.

Mounting completionAttach the lid and lock it by turning the fourcorner screws through 90.

LabellingAttach the sign with the cable system data ac-cording to DIN 4102 Part 12.

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51OBOVBS

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Mounting aid, Aquasit casting compound

Aquasit is a two-component casting compound in a press cartridge for applications in areas with extremely high, con-tinuous moisture. It can also be used against mechanical shock and vibrations.The cartridge is suitable for use in standard cartridge pistols. At room temperature, the unopened aluminium packag-ing can be stored for up to a year. When the cartridge is opened, the material should be used within 24 hours.Properties of Aquasit:Protection rating: IP68 at 1.8 bar: 1000 hr.Rated voltage: 400 VImpact resistance: >20 kV/mm according to VDE 0291 Part 2Operational temperature: -40 to +90 CProcessing temperature: 0 to +40 CHalogen-free, silicone-free, isocyanite-freeEnvironmentally friendly and without a labelling requirement

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53OBOVBS

Mounting aid, Aquasit casting compound

PreparationsDuring wall installations, to be able to fill withAquasit, remove one plug-in seal in the toparea of the box.

Add the AquasitAquasit can be processed using a standardcartridge pistol. An emulsion tube must beplaced on the Aquasit cartridge. This can beused to fill multiple cable boxes. After opening,the Aquasit must be used within 24 hours. Thegel in the emulsion tube hardens after approx.2030 min.

Fully cast junction boxThe plug-in seal can be inserted again after thejunction box has been cast. The electrical sys-tem can be recommissioned immediately. Thejunction box is now protected against any kindof continuous moisture and fulfils the protectionrating IP 68.

Pump shaft applicationAquasit can be used to protect those electricalinstallations, which could be damaged by ex-treme or continuous moisture.

Preparation for external installationIn the case of applications in the ground, e.g.for cable branches, Aquasit can protect the in-stallation, when it becomes invisible at a latertime. Cable glands should be attached to thejunction box as strain relief.

Add the AquasitAquasit can be processed using a standardcartridge pistol. An emulsion tube must beplaced on the Aquasit cartridge. This can beused to fill multiple cable boxes. After opening,the Aquasit must be used within 24 hours. Thegel in the emulsion tube hardens after approx.2030 min.

Filled junction boxIt is sufficient to fill the junction box so that theterminals are completely covered.

Electrical testingWhen hardened, Aquasit is soft and elastic.This means that electrical connections can beinspected at any time. Aquasit is "self-healing",meaning that the holes of the inspection pointsclose themselves, posing no risk to the protec-tion rating. The compound can be easily re-moved and refilled later for retroinstallations.

Fully cast junction boxThe junction box is cast and now fulfils the pro-tection rating IP68.

54 OBO VBS

55OBOVBS

Planning aids, concealed and cavity wall systems

Mounting aid, concealed systems 56

Mounting aid, cavity wall systems 60

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Mounting aid, concealed systems

OBO concealed systems offer a wide range of accessories and are ideally suited for use in any masonry and all ar-eas of application. The systems were developed according to the state of the art and are perfectly matched. They canfulfil any practical requirements, thus allowing perfect installations in record time.

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Mounting aid, concealed systems

Accessory socket installationConcealed devices and connection socketscan easily be plastered into masonry of allkind.

Accessory socket installation with nail strapsConcealed accessory socket with nail strapscan be fastened in masonry using steel nails.The nail strap also prevents excessive penetra-tion in the mounting opening.

Distributor box installationConcealed connection boxes allow distribu-tions to be created in the wall.

Combination of concealed socketsThe accessory socketsand the device connec-tion sockets can be interconnected via theirtunnel supports. The combination distance is71 mm.

Surface equalisation ringsIf the plaster on the wall is to be thicker, sur-face equalisation rings can be screwed to theaccessory or connection sockets.

Signal coverBefore plastering, place the signal cover on thedevice or connection sockets. They preventsoiling of the socket interior and simplify find-ing the sockets again after plastering.

Sprung coverWith connection sockets, the sockets can beclosed simply after installation using the sprungcover.

Universal coverUniversal covers are suitable for accessorysockets with 60 mm hole spacing, and connec-tion sockets with 67 mm hole spacing.

Wall light connection socketsSupply cables for wall lights must end in walllight connection sockets. These boxes offerspace for three terminal strips and a cable re-serve.

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Device connection socketsDevice connection sockets allow the installa-tion of an accessory and can offer additionalspace for at least three connection terminals.

Bending radiiThe device connection boxes with increasedbox volume are suitable for maintaining bendradii in a concealed installation (e.g. for coaxialcables).

CEE concealed fitted plugThe CEE accessory socket2392 and the coverplate 2393/UP allow the installation of CEEflanged sockets with 60 x 60 mm fastening di-mension.

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59OBOVBS

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60 OBO VBS

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Mounting aid, cavity wall systems

The cavity wall system with soft membrane guide comprises perfectly matched products, with which you can createinstall wind-tight stand-off wall systems in any building from a detached house to a large-scale construction project.The system is suitable for wall thicknesses from 7mm to 35 mm.

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61OBOVBS

Mounting aid, cavity wall systems

Distributor box installationCavity wall distributor boxes allow distributionsto be created in the wall.

Preparation of mounting holeDraw on the centre of the hole and cut out adrill hole of 68 mm using a circular band saw.With combination mounting, maintain the stan-dardised hole spacing of 71 mm and create asecond hole vertically or horizontally to the firstone.

Mounting of accessory socketInsert cables and/or pipes into the accessorysocket in advance these clamp themselves inthe socket automatically. Then place the acces-sory sockets in the drill hole.

Preparation of mounting hole for doubleaccessory socketsWhen using the double accessory socket, twoholes are drilled in advance at a spacing of 71mm and a diameter of 68 mm. The rest is cutout with a knife.

Mounting of double accessory socketsInsert cables and/or pipes into the accessorysocket in advance these clamp themselves inthe socket automatically. Then place the acces-sory sockets in the drill hole.

Fastening the cavity wall socketsFix the accessory sockets in the drill hole usinga screwdriver and the fastening screw. Thesmall holding plates on the rear side of thesockets provide the necessary hold.

Mounting of installation units in cavity wallsocketsNow equip ready-placed accessory and con-nection sockets with device installation units.

Wind-proof installationWhen using the wind-tight cavity wall accessorysockets, push the cables and/or pipes directlythrough the soft membrane entry.

Sealing of the input cablesThe cables and/or pipes are tightly sealed bythe sealing membrane. This means that noleakage air currents can escape from the de-vices.

62 OBO VBS

63OBOVBS

Planning aids, clamp systems

Mounting aid, terminal systems 64

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Mounting aid, clamp systems

Electrical connections are made with screw-in and screwless terminals. In terminal strips and Dol branch terminals,the cables are fixed in the terminal using a screw. With screwless terminals, the contact and the holding force is ap-plied to the wires using special spring mechanics. The transparent cover of the contact terminals allows a visualcheck of the correct wire connection in the screwless terminals.

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Mounting aid, clamp systems

Protective conductor terminal applicationNeutral and protective conductor terminals canbe snapped onto 35 mm hat profile rails in atransverse direction.

Neutral conductor terminal applicationNeutral and protective conductor terminals canbe snapped onto flat irons, 10 x 2.5 mm, in alengthwise direction.

Dol branch terminal applicationWith Dol branch terminals, individual terminalscan be twisted off to separate them. Colouredterminals are available for the different wirecolours, meaning that continuously colouredwiring is not a problem.

Application in a concealed distributor boxWith Dol branch terminals (socket lamp-wireconnectors), multiple cables can be screwedtogether in one terminal.

Application in junction boxDol branch terminals are also used for wiringwithin junction boxes.

Terminal strip applicationFlexible and rigid cables can be interconnectedin terminal strips.

Flexible fine-wire cablesThe type 74/D means that it is possible to con-nect fine-wire cables without end sleeves.The wire protection clamp ensures full-surfacecontacts of the fine copper wires.

Terminal strip applicationFor luminaire connection, wire ends can be se-cured with terminal clips.

Terminal stripsTerminal strips are available in various versionswith various current load capacities and con-nection cross-sections.

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Terminal stripLamp-wire connectors of the .../CE series areavailable in both white and black.

Terminal stripTerminal strips are soft and flexible.

Terminal stripThe terminal strips can be cut down to the cor-rect number of poles.

Packaging information, screwless terminalThe packaging of the screwless terminals hasbriefly sketched user information.

Shortening of wiresA mark on the screwless terminal shows thecorrect amount of insulation to be removed.This not only ensures the perfect fit of thewires, but also maximum touch protection. Thecorrect fit of the wires can be checked throughthe transparent sight glass.

Slackening a wireThe individual wires sit tightly and firmly in thescrewless terminal. They can be released byrotating and pulling them simultaneously.

Testing pin openingPractical and safe: the rear testing pin openingallows safe measurement and testing of thewires with a testing pin or phase tester (max. 2 mm).

Concealed and cavity wall screwless terminalapplicationScrewless terminals are used for "quick" wiringin cavity walls and concealed sockets.

Screwless terminals application in junctionboxesScrewless terminals are ideally suited to forwiring cables within junction boxes. Cross-sec-tions of between 0.75 mm and 2.5 mm canbe connected in a terminal type using the OBOscrewless terminals.

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67OBOVBS

68 OBO VBS

69OBOVBS

Planning aids, cable gland systems

General planning aid 70

Mounting aid, plastic cable glands 72

Mounting aid, brass cable glands 74

Mounting aid, EMC cable glands 77

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Useful information about cable glands

Thread increase Pg

Thread increase, metric

Cable glands are manufactured andtested according to DIN EN 50262.Amongst other things, this standardcontrols the retaining ability andstrain relief of cables. The V-TEC ca-ble glands from OBO Bettermanncorrespond to version "A". Table 2Aof the standard specifies which with-drawal forces these cable glandsmust withstand. The V-TEC cableglands also fulfil the requirements ofDIN EN 50262 with regard to thetwist protection of cables (see Table3).

To ensure the tested dust and mois-ture protection of the cable glands,continuous perforations should cor-respond to the mounting openingsspecified in the standard DIN EN50262 according to Table 1. The on-site specialist must ensure that theseparameters are complied with in or-der to handover a functioning sys-tem.

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71OBOVBS


Table 1Size of the penetration hole mm 6 8 10 12 16 20 25 32 40 50 63 75

Thread of the cable gland M M6 M8 M10 M12 M16 M20 M25 M32 M40 M50 M63 M75

Diameter of the mountinghole (+0.2/0.4) mm 6.5 8.5 10.5 12.5 16.5 20.5 25.5 32.5 40.5 50.5 63.5 75.5

Table 2 ACable diameter Retaining capacity Strain relief, version A

mm N N

to 4 5 --

>4 to 8 10 30

>8 to 11 15 42

>11 to 16 20 55

>16 to 23 25 70

>23 to 31 30 80

>31 to 43 45 90

>43 to 55 55 100

>55 70 115

Table 3

Cable diameter TorqueVersion A and B

mm Nm

>4 to 8 0.10

>8 to 11 0.15

>11 to 16 0.35

>16 to 23 0.60

>23 to 31 0.80

>31 to 43 0.90

>43 to 55 1.00

>55 1.20

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Mounting aid, plastic cable glands

The quickest and most convenient way of providing strain relief and tightness with cable glands on junction boxesand housings is with the tried-and-trusted V-TEC VM cable glands from OBO. With the integrated sealing lip and thespecial OBO lamella technology protection class IP 68 is achieved. Strain relief and tightness have been tested toDIN EN 50262.The connecting threads of the cable glands are metric or PG and are therefore suitable for universal use. Oncescrewed in place, the fitting is there forever, as the optimum thread adjustment with the right pitch ensures permanentresistance to shaking.Applications: from private housing with junction boxes up to industrial applications in the distributor cabinet.

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73OBOVBS

Mounting aid, plastic cable glands

Installation in housings without a threadCable glands can be installed in junction boxesor housings without a thread using a locknut.

Installation of cable glandsAny openings required on the junction box canbe broken out. Then, push the cable glandsthrough the opening and lock them tightly inthe interior with a locknut.

Installation in housings with a threadCable glands can be screwed directly into junc-tion boxes or housings with threads.

Installation of cable glandsCable glands are screwed directly into thethread in the housing wall.

Installation of V-TEC VM cable glandsCable glands of type V-TEC VM are used wher-ever strain relief for cables must be achieved inaddition to the mechanical resistance.

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Mounting aid, brass cable glands

Tough conditions are no problem for the brass V-TEC VM.Here too, the known V-TEC cap nut design of the cable glands ensures a secure hold of the cables. The protectionclass IP68 is achieved using separate sealing rings and the special OBO slat technology. Strain relief and tightnesshave been tested to DIN EN 50262.The connecting threads are metric or PG and are therefore suitable for universal use. Once screwed in place the fit-ting is there for ever, as the optimum thread adjustment with the right pitch ensures permanent resistance to shaking.Applications: from private housing with junction boxes up to industrial applications in the distributor cabinet.

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75OBOVBS

Mounting aid, brass cable glands

Mounting of V-TEC MS on motor connectionboxBrass V-TEC VM cable glands are used undertough conditions.

Cable entry with V-TEC MS on distributorsystemsIn industrial distributor systems, cables are in-serted in the system using cap nut cableglands of type V-TEC MS.

Brass cable gland in LKM ductMetal cable glands are also suitable for run-ning cables out of a metal line routing duct(LKM).

Mounting of brass cable glandThe required openings are drilled in the sidewall of the LKM. Then, push the cable glandsthrough the opening and lock them tightly inthe interior with a locknut.

Cone cable gland applicationCables can be inserted in switching systemsand distributor cabinets using cone cableglands.

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EMC cable glandsThe guarantee of fault-free operationof electrical systems is one of themost important aims of an installa-tion. The topic of EMC (electromag-netic compatibility) is an importantsubject in industrial systems. In par-ticular, i

Katalog Vbs 2012 Connection and Fastening En

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