PART SEVENSPECIAL INSTALLATIONS OR

LOCATIONS

CHANGEAdditions and reorganisation

• […] high protective conductor currents now section 543543

• Highway power supplies […] now section 559559

Part 7

Special Installations and Locations

Major changes:-

• Greatly expanded

• Bathrooms :- No zone 3, RCD’s required to all circuits

• Swimming pools:- Zones now numbered, fountains inc.

• Construction/Agriculture:- no 0.2 sec. disconnection

• Caravan parks:- changes

Section 700 GENERAL

Section 701 LOCATIONS CONTAINING A BATH OR SHOWER

Section 702 SWIMMING POOLS & OTHER BASINS

Section 703 ROOMS & CABINS CONTAINING HOT AIR SAUNAS

Section 704 CONSTRUCTION & DEMOLITION SITE INSTALLATIONS

Section 705 AGRICULTURAL AND HORTICULTURAL PREMISES

Section 706 CONDUCTING LOCATIONS WITH RESTRICTIVE MOVEMENT

Section 708 CARAVAN / CAMPING PARKS & SIMILAR

Section 709 MARINAS & SIMILAR LOCATIONS

Section 710 MEDICAL LOCATIONS (RESERVED)

Section 711 EXHIBITIONS, SHOWS & STANDS

Section 712 SOLAR PHOTOVOLTAIC (PV) SUPPLIES

Section 717 MOBILE OR TRANSPORTABLE UNITS

Section 721 […] CARAVANS & MOTOR CARAVANS

Section 740 TEMPORARY […] FAIRGROUNDS […]

Section 753 FLOOR & CEILING HEATING SYSTEMS

Questions asked on special locations - go straight Questions asked on special locations - go straight to that section and scanto that section and scan

Section 701 Locations containing a bath or a shower

Section 702 Swimming pools & other basins

Section 703 Rooms & cabins containing sauna heaters

Section 704 Construction & demolition sites

Section 705 Agricultural & horticultural premises

Section 706 Conducting locations with restricted movement

Section 708 […] installations in caravan/camping parks […]

Section 709 Marinas & similar locations

Section 711 Exhibitions, shows & stands

Section 712 P.V. power supply systems

Section 717 Mobile or transportable units

Section 721 […] caravans & motor caravans

Section 740 Temporary […] fairgrounds […] circuses

Section 753 Floor & heating systems

SECTION 701 LOCATIONS CONTAINING A

BATH OR SHOWER

ZONE 0 Interior of bath/shower (if no basin 0.10m high)

ZONE 1 2.25m or height of water outlet

ZONE 2 0.6m external to zone 1

ZONE 3 REMOVED

701.32.2701.32.2 to 701.32.4701.32.4

• Space under basin :- ZONE 1, If only accessible by tool OUT OF ZONES 701.32.3701.32.3

• For showers with no basin there is no zone 2, but an extended zone 1 up to a horizontal measurement of 1.2m

FOR DETAIL SEE DIAGRAMS IN BS7671 Page 168-169FOR DETAIL SEE DIAGRAMS IN BS7671 Page 168-169

EXTRACTSEXTRACTS

Supplementary bonding required, can be in proximity. Can be omitted if RCD’s & protective equipotential bonding in situ

External influences 701.512.2External influences 701.512.2

Activity What are the MINIMUM IP codes for

Zone 0

Zone 1&2

IPX7IPX7

IPX4IPX4 Where water jets IPX5IPX5

Additional protection by RCD’s 701.411.3.3Additional protection by RCD’s 701.411.3.3

• Provided for all circuits of the location

Electrical separationElectrical separation 701.413701.413

• For 1 item of equipment or 1 single socket

SELV PELV 701.414.4.5SELV PELV 701.414.4.5

• To have basic insulation

Additional protection 701.412.2Additional protection 701.412.2

Switchgear 701.512.3Switchgear 701.512.3.

ZONE 0 No switchgear permitted

ZONE 1 SELV switching only ≤ 12V a.c. (source outside zones)

ZONE 2 SELV switching & socket-outlets as above and shaver outlets to BSEN 61558-2-5

Socket-outlets prohibited within 3m of zone 1

Current using equipment 701.55Current using equipment 701.55

ZONE 0 Fixed, permanent connection, SELV & to relevant standardZONE 1 Allowed:-Whirlpool units, Showers, Pumps,

SELV, Fans, Towel rails, Water heaters, Luminaires

If under floor heating is employed it must have an earthed metallic grid or sheath unless SELV

701.753701.753

SECTION 702 SWIMMING POOLS & OTHER BASINS

Applies to fountains, paddling pools

Zones changed from alphabetical to numeral

Zone 0 The interior of the basin

Zone 1 2m from the rim of the basin and a height of 2.5m

Zone 2 1.5m external to zone 1

No zone 2 for fountains

702.32702.32

VOLUMEZONE 0

IPX8

IPX8

ZONE 1 ZONE 2

1.5m1.5m

ZONE 1

IPX4 (IPX5)2.5M

WATER JET CLEANING

ZONE 2

IPX4

(IPX5

OUTDOOR)

(IPX2

INDOOR)

1.5m 2.0m

2.5m

A

Zones and external influencesZones and external influences

Swimming Pools

• ZONE 0,1,2:- Every exposed & extraneous conductive part connected by supplementary protective bonding 702.411.3.3

• ZONE 0 1:- No switchgear allowed (exemptions apply to zone 1 702.55.4) , no socket-outlets (exemptions apply) 702.53 Only necessary wiring 702.522.22. No joint boxes unless SELV 702.522.24

• ZONE 2:- Socket-outlet permitted if• SELV or• Automatic disconnection of supply with RCD or• Electrical separation

• Underwater luminaires to relevant standards 702.55.2

SECTION 703 ROOMS & CABINS CONTAINING

SAUNA HEATERS

ZONE 1

Only the heater and directly associated equipment to be installed.

ZONE 2

No special requirements for heat resistance.

ZONE 3

Equipment suitable for 125°C

Cables 170°C

All switchgear other than the thermostat and the thermal cut-out to be installed outside the sauna

1m

0.5m

3

2

1

0.5m

0.5m1

SECTION 704 CONSTRUCTION & DEMOLITION SITE INSTALLATIONS

Applies to:-

New Building Construction, Repairs Alterations Extensions, Engineering Construction, Earth Works, Similar Works 704.1.1704.1.1

• NO 0.2 DISCONNECTION TIMES

Socket-outlets & hand held equipment up to 32A protected by

• reduced low voltage (110V) or

• automatic disconnection of supply with a 30mA RCD or

• electrical separation or

• SELV, PELV 704.410.3.10704.410.3.10

• Over 32A – 500mA RCD

• TN-C-S not to be used (unless fixed building) 704.411.3.1704.411.3.1

• Cables not run across roadways unless adequately protected 704.522.8.10704.522.8.10

• Reduced low voltage cables 300/500V thermoplastic.

• Higher voltage cables HO7 RN-F abrasion & water resistant 450/750V 704.522.8.11704.522.8.11

• Distribution equipment to BSEN 60439-4• Plugs/sockets ≥16A to BSEN 60309-2 704.511.1704.511.1• To incorporate suitable devices for switching & isolation (lockable) 704.537.2.2704.537.2.2

Site Incoming UnitSite Incoming Unit

Mains Distribution UnitMains Distribution Unit

Transformer UnitsTransformer Units

Outlet UnitsOutlet Units

Extension Outlet UnitsExtension Outlet Units

SECTION 705 Agricultural & Horticultural Premises

• NO 0.2 DISCONNECTION TIME

Automatic Disconnection of supply 705.411Automatic Disconnection of supply 705.411

• Circuits with socket-outlets ≤ 32A - 30mA RCD

• Circuits with socket-outlets > 32A - 100mA RCD

• All other circuits - 300mA RCD

Additional protection 705.415.2.1Additional protection 705.415.2.1

Locations with livestock to contain supplementary bonding to inc. the metal floor grid

Where no metal grid installed – TN-C-S not recommended

Protection against thermal effects 705.42Protection against thermal effects 705.42

• Heaters - fixed and away from combustible material & livestock 0.5m or manufacturers instruction. Visual on-off position 705.33705.33

• For fire protection 300mA RCD, S type on circuits not containing socket-outlets

External influences 705.512.2External influences 705.512.2

• Equipment to have Min. IP44

Accessibility 705.513Accessibility 705.513

• Equipment inaccessible to livestock

Identification 705.514Identification 705.514

Documentation to include• Equipment location plan

• Routing of concealed cables

• Distribution flow diagram

• Equipotential bonding

Wiring systems 705.52Wiring systems 705.52

• Inaccessible to livestock or suitably protected

• Where vehicles operate

• buried 0.6m with mechanical protection

• cultivated land - 1m

• suspended cables 6m high

Conduit/trunking systems 705.522.16Conduit/trunking systems 705.522.16

where livestock kept external influences – AF4

• conduit (corrosion) :- class 2 – indoor, class 4 – outdoor where vehicles operating external influences – AG3 • conduit (impact) :- 5J

Isolation 705.537.2Isolation 705.537.2

• equipment installed where it will not be impeded by livestock, clearly marked, break all live conductors

Protective bonding conductors 705.544Protective bonding conductors 705.544

• shall be protected against mechanical damage, corrosion, & electrolytic effects

Socket-outlets and luminaires to comply with appropriate standards, IP codes, and limiting temperature 705.55705.55

Safety services 705.56Safety services 705.56

Where high density livestock rearing exists, food, water, temperature & ventilation:- suitably designed, installed and monitored with standby supplies if required.

SECTION 706 Conducting locations with restricted movement

(name change)

Appropriate measures for protection

• Automatic disconnection of supply – supplementary bonding

• SELV, PELV

• Class II equipment with additional 30mA RCD

• Electrical separation – one item of equipment

SECTION 708 Electrical installations in caravan/camping parks

Only TN-S systems to be used for supplies

TN-C-S may be used for fixed site buildings, for supplies other earthing arrangements to be considered i.e. T-T 708.411.4708.411.4

Plugs & socket-outlets 708.553.1Plugs & socket-outlets 708.553.1

0.5-1.5m

No more than 4 sockets at any one point,1 per pitch

Equipment to AD4, AE2, AG3

Individual RCD protection & overcurrent protection

BSEN 60309-2

IP44

16A min.

20m max.

Underground cables 0.6m

Overhead 3.5 or 6m

SECTION 709 Marinas & similar locations

Only TN-S systems to be used for supplies

TN-C-S may be used for fixed site buildings, for supplies other earthing arrangements to be considered i.e. T-T 709.411.4709.411.4

Plugs & socket-outlets 709.553.1Plugs & socket-outlets 709.553.1

0.3 - 1m

No more than 4 sockets at any one point,1 per craft

Individual RCD protection 709.531.2709.531.2

BSEN 60309-2 up to 63A

Generally 16A

IP44* Close to craft

External influences 709.512External influences 709.512

Water:- splashes AD4, IPX4

jets AD5, IPX5

waves AD6, IPX6

AE2, IP3X. AF2. AG2

Connection notice to be supplied 709.3709.3 page 196

SECTION 711 Exhibitions, shows & stands

• Only TN-S systems to be used for supplies 711.411.4711.411.4

• Accessible metallic parts to haveprotective equipotential bonding 711.411.3.1.2711.411.3.1.2

• All circuits, except emergency lighting, on 30mA RCD 711.411.3.3711.411.3.3

• Equipment that generates heat to be suitably guarded, installed, as not to cause danger 711.422.4.2711.422.4.2

• Switchgear in locked cabinet 711.51711.51

Wiring systems 711.52Wiring systems 711.52

• Cables to be mechanically protected i.e. armoured, conduit

• Min. c.s.a. 1.5mm2

• Flexes not in accessible areas unless protected

• If no fire alarm system installed in the building that is housing the show – flame retardant cable to be used

Joints to be avoided where possible 711.526.1711.526.1

Every separate structure to have isolation 711.537.2.3711.537.2.3

Adequate number of socket-outlets for safety reasons 711.55.7711.55.7

Insulation piercing lampholders for festoon lighting to be compatible with cable and non-removable 711.559.4.3711.559.4.3

Luminaires below 2.5m to be firmly fixed

SECTION 712 Solar photovoltaic (PV) power supply systems

PV equipment on the d.c. side considered to be energised at all times 712.410.3712.410.3

Protection by class II preferred for d.c. side 712.412712.412

PV cables protected against short-circuit currents by appropriate device 712.434712.434

Wiring loops short (lightning strikes) 712.444.4.4712.444.4.4

Equipment & wiring systems selected for external influences

712.522.8.3712.522.8.3

Switch disconnectors to be supplied for d.c. side

Suitable warning notices fitted 712.537.2.2712.537.2.2

SECTION 717 Mobile or transportable units

Applies to mobile vehicles & transportable containers/cabins NOT generating sets, caravans, vehicle electrics 717.1717.1

Automatic disconnection of supply by RCD 717.411.1717.411.1

Accessible conductive parts to be connected through main protective bonding (fine stranded H05V-K0 712.411.3.1.2712.411.3.1.2

Effectiveness of TN-C-S system to be ascertained 712.414.4712.414.4

An IT system may be provided (with exceptions) 717.411.6717.411.6

Notices shall be available near the incoming supply to state the characteristics 717.514717.514

Wiring systems 717.52Wiring systems 717.52

• Supply flexes to H07RN-F min. c.s.a. 2.5mm2

• Internal wiring – singles in conduit – multi-core installed appropriately

No equipment or wiring to run through gas cylinder storage areas except ELV controls if unavoidable

• 500mm high, gas tight conduit- AG3

Supply connections to BSEN 60309-2 IP44

Diagrams page 206-207

SECTION 721 Electrical installations in caravans & motor caravans

Installation voltages:-

a.c. :- not to exceed 230V single-phase 400v single-phase

d.c. :- not to exceed 48V 721.313721.313

This section has an annex for guidance on ELV d.c. installations page 214

No1No1 BSEN 60309-2 IP 44 1.8m FROM GROUND. SUPPLY CABLE max. 25m (+ 2m) 721.55721.55

No2No2 VOLTAGE,FREQUENCY LABEL

No3 No3 MAIN SWITCH/RCD WITH APPROPRIATE PROTECTIVE 721.411, 721.411, 721.43, 721.53721.43, 721.53

No4No4 NOTICE STATING METHOD OF CONNECTION TO SITE SUPPLY 721.514721.514

No5No5 CABLE – STRANDED Min. 1.5mm2, P.C. INSTALLED TROUGHOUT SUPPORTED FOR FLEXING (AH) 0.4m vertical 0.25m horizontal 721.411, 721.521721.411, 721.521

No6 No6 LUMINAIRES PREFERABLY FIXED DIRECT, PENDANTS TO HAVE SUPPORT IN TRANSIT 721.55.2.4721.55.2.4

No7No7 ACCESSIBLE METALLIC PARTS CONNECTED THROUGH MAIN PROTECTIVE BONDING 721.411.3.1.2721.411.3.1.2

No8No8 LPG AS SECTION 717

8

8

SECTION 740 Temporary electrical installations for […] fairgrounds,

amusement parks & circusesSupply voltages:-

230/400v a.c.

440v d.c.

TN-C-S not to be used 740.411.4740.411.4

300mA time delay RCD at origin, 30mA RCD for lighting, socket-outlets & mobile equipment up to 32A 740.41740.41

Bonding required for metalwork where animals are kept

Switchgear in cabinets accessible with key 740.51740.51

Equipment Min. IP44

Cables installed in public areas, underground & over walkways to be suitably mechanically protected, conduit – class 3, where movement exists – flexible. 740.52740.52

Joints to be avoided 740.526740.526

Each booth/stand to have its own isolator disconnecting all live conductors 740.537740.537

Equipment 740.55Equipment 740.55

Luminaires:- suitably IP rated, fixed if below 2.5m, guarded, fitted to avoid heat concentration

Socket-outlets:- 1 per m2, outside - BSEN 60309-2

Supplies:- permanently marked, labelled, with characteristics

Inspected & testedInspected & tested after each site assembly 740.6740.6

SECTION 753 Floor & ceiling heating systems

30mA RCD for automatic disconnection of supply even class II 753.411753.411 to avoid unwanted tripping load limited to 7.5kW at 230VAppropriate design, manufacturers instructions to be followed to limit surface temperature & overheating

Ceiling heating to IPX1, floor to IPX7 753.512.2753.512.2

Plans and instructions to be provided 753.514753.514

Elements not to cross expansion joints 753.515753.515