Philippine Electrical Code for RME Hacked

Roel B. Calano

PhilippineElectricalCode

Roel B. Calano

Roel B. Calano

IntroductionPEC Part I Consist of rules which regulates electrical installation or

design done inside the buildingPEC Part II Consist of rules which regulates electrical installation or

design done outside the buildingEnforcement of the rules The PEC is intended for mandatory application by the governmentbodies exercising legal jurisdiction over electrical installation Mandatory rules shall be characterized by the use of the terms shallor shall not Permissive rules shall be characterized by the use of the terms shallbe permitted or shall not be required Explanatory rules reference to other materials

Roel B. Calano

IntroductionCoverage of PEC Not Covered of PEC

Public and Private building AircraftsGenerating and industrial Plant Motor VehicleElectric Substations, IndustrialPlants and Transformer Stations Railways rolling stackAirfieldsSwitchyardsRecreational establishmentQuarries and minesOffshore establishmentMobile homesetc.

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Branch Circuit Loading

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The floor area for each floor shall be computed fromthe outside dimensions of the building Apartment, or other area involved. For dwelling unit(s), the computed floor area shallnot include open porches, garages, or unused orunfinished spaces not adaptable for future use. based on minimum load conditions In dwelling units and guest rooms or guest suites ofhotels and similar occupancies the voltage shall notexceed 230 volts for hp load or 1440 VA In all occupancies the minimum load for each outletfor general-use receptacles and outlets not used forgeneral illumination

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The minimum number of branch circuit shall bedetermined from the total calculated load, size andrating of the circuit

For dwelling units there shall be two or more smallappliance branch circuit

At least one 20 A branch circuit for Laundry circuit At least one 20 A to supply bathroom receptacle

outlet For dwelling unit having a floor are of not more

than 50 sq mm and shall not exceed 3680 VA single 20 A branch circuit are permitted

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Outlet for specific appliance or other load exceptfor a motor load = Ampere rating of appliance orload served.

Outlet for motor load = Motor rating An outlet supplying recessed lighting fixture(s) shall

be the maximum volt-ampere rating of theequipment and lamps for which the fixture(s) israted.

Outlet for heavy-duty lamp holder = 600 volt-amperes

Other outlets = 180 volt-amperes per outlet For receptacle outlets, each single or each multiple

receptacle on one strap shall be considered at notless than 180 volt-amperes.

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General LightingType of Occupancy Unit Load persq m Area--VA Type of Occupancy

Unit Loadper sq mArea--VA

Armories Auditoriums 8 Lodge Rooms 12Banks 28** Office Buildings 28**Barber Shop and Beauty Parlors 24 Restaurants 16Churches 8 Schools 24Clubs 16 Stores 24Court Rooms 16 Warehouses (storage) 2

Dwelling Units 24In any of the above

occupancies except one-Familydwelling and individual

dwelling units of Two-familyand of multifamily dwellings:Garages Commercial (storage) 4

Hospitals 16 Assembly Halls and Auditoriums 8Hotels and Motels, includingapartment houses Withoutprovisions for coking by tenants

16 Halls, Corridors, Closets,Stairways 4

Industrial Commercial (Loft)Building 16 Storage Spaces 2

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Ampacity and Rating

Branch Circuit Rating = 100 % (Sum of Non Continuous Load) +125 % (Sum of Continuous Load)

Additionalreceptacle ifmore than1700 mm

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Receptacle General Provision

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Receptacle General Provision

Receptacles shall be installed that no pointmeasured horizontally along the floor line in anywall space is more than 1800 mm from receptacleoutlet

Receptacles in floors shall not be counted as partof the required number of receptacle outlet unlesslocated within 450 mm of the wall

Receptacle outlet shall be located above, but notmore than 500 mm above, the countertop

Receptacle outlet in bathroom shall be locatedwithin 900 mm from basin

Basement and garages one receptacle outlet

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Ampacity and Rating

Fastened in a place = 50 %Not Fastened in a place = 80 %

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Ampacity and RatingOther Loads -- All Occupancies. In all occupancies, the minimumload for each outlet for general-use receptacles and outlets notused for general illumination be not less than the following,the loads being based on nominal branch-circuit voltages.1.Outlet for specific appliance2.Outlet for motor load3.Recessed lighting4.Outlet for heavy-duty lamp holder -660 VA for admedium typeor not less than 750 for others5.Track lighting6.Sign and outline lighting1200 W7.Other outlets-180 volt-amperes per outlet.

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Ampacity and Rating

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Ampacity and Rating

Apply a demand factor of 75 % of the total Load forfour or more dedicate loads connected in outlet

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Fuses and Fixed-Trip Circuit Breakers. The standard ampere ratingsfor fuses and inverse time circuit breakers shall be considered15, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100,110, 125, 150, 175,200, 225, 250,300, 350,400, 450,500,600,700,800,1000, 1200, 1600, 2000,2500, 3000, 4000,5000, and 6000 amperes. Additional standard ampere ratings forfuses shall be 1, 3, 6, 10, and 601. The use of fuses and inversetime circuit breakers with nonstandard ampere ratings shall bepermitted.

Ampacity and Rating

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Circuit RatingAmperes

ReceptacleRating Amperes

Maximum LoadAmperes

15 or 20 15 1220 20 1630 30 24

Circuit Rating Over currentProtection Maximum Load15 A 15 A 15 A20 A 20 A 20 A30 A 30 A 30 A40 A 40 A 40 A50 A 50 A 50 A

Branch Circuit

Branch Circuit Rating = Receptacle (outlet) Rating = Size of theProtective Device = Ampacity of the serving conductor = Maximum Load

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A. 15- and 20-Ampere Branch Circuits. A 15- or 20-ampere branchcircuit shall be permitted to supply lighting units or otherutilization equipment, or a combination of both

1. Cord-and-Plug-Connected Equipment. The rating of anyone cord-and-plug-connected utilization equipment shall notexceed 80 percent of the branch-circuit ampere rating.

2. Utilization Equipment Fastened in Place. The total ratingof utilization equipment fastened in place, other thanluminaires lighting fixtures, shall not exceed 50 percent ofthe branch-circuit ampere rating where lighting units, cord-and-plug-connected utilization equipment not fastened inplace, or both, are also supplied.

Branch Circuit

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B. 30-Ampere Branch Circuits. A 30-ampere branch circuit shall bepermitted to supply fixed lighting units with heavy-duty lampholders in other than a dwelling units or utilization equipment inany occupancy. A rating of any one cord-and-plug-connectedutilization equipment shall not exceed 80 percent of the branch-circuit ampere rating.

C. 40- and 50-Ampere Branch Circuits. A 40- or 50-ampere branchcircuit shall be permitted to supply cooking appliances that arefastened in place in any occupancy. In other than dwelling units,such circuits shall be permitted to supply fixed lighting unitswith heavy-duty lamp holders, infrared heating units, or otherutilization equipment.

Branch Circuit

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D. Branch Circuits Larger Than 50 Amperes. Branch circuits largerthan 50 amperes shall supply only non-lighting outlet loads.

1. General Provisions. In every kitchen, family room, diningroom, living room, parlor, library, den, sunroom, bedroom,recreation room, or similar room or area of dwelling units,receptacle outlets shall be installed

2. Spacing. Receptacles shall be installed so that no pointmeasured horizontally along the floor line in any wall space ismore than 1800 mm from a receptacle outlet.

Branch Circuit

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E. Bathrooms. In dwelling units, at least one wall receptacle outletshall be installed in bathrooms within 900 mm of the outsideedge of each basin. The receptacle outlet shall be located on awall or partition that is adjacent to the basin or basincountertop.

F. Outdoor Outlets. For a one-family dwelling and each unit of atwo-family dwelling that is at grade level, at least onereceptacle outlet accessible at grade level and not more than2000 mm above grade shall be installed at the front and back ofthe dwelling

Branch Circuit

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G. Laundry Areas. In dwelling units, at least one receptacle outletshall be installed for the laundry.

H. Basements and Garages. For a one-family dwelling, at least onereceptacle outlet, in addition to any provided for laundryequipment, shall be installed in each basement and in eachattached garage, and in each detached garage with electricpower.

I. Hallways. In dwelling units, hallways of 3000 mm more in lengthshall have at least one receptacle outlet.

J. Show Window. At least one receptacle outlet shall be installeddirectly above a show window for each 3600 linear mm majorfraction thereof of show window area measured horizontally atits maximum width.

K. Heating, Air conditioning and Refrigeration Receptacle locatedwithin 7600 mm

Branch Circuit

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Number of Branch Circuits. The minimum number of branchcircuits shall be determined from the total computed load andthe size or rating of the circuits used. In all installations, thenumber of circuits shall be sufficient to supply the load served.

Small Appliance Branch Circuits. Dwelling Unit. In addition tothe number of branch circuits determined in accordance withabove, two or more 20-ampere small appliance branch circuitsshall be provided for all receptacle outlets for the smallappliance loads.

Small Appliance Circuit load. Computed at 1500 VAElectric Clothes Dryer. Computed at 5000 VA or nameplaterating whichever is larger

Branch Circuit

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Laundry Branch Circuits Dwelling Unit. In addition to thenumber of branch circuits determined at least one additional20-ampere branch circuit shall be provided to supply the laundryreceptacle outlet(s) required. This circuit shall have no otheroutlets.

Load Evenly Proportioned Among Branch Circuits. Where theload is computed on a volt-amperes-per-meter basis, the wiringsystem up to and including the branch-circuit panelboard(s)shall be provided to serve not less than the calculated load. Thisload shall be evenly proportioned among multioutlet branchcircuits within the panelboard(s). Branch-circuit overcurrentdevices and circuits need only be installed to serve theconnected load.

Branch Circuit

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Feeder conductors shall have sufficient ampacity tosupply the load served

Where a feeder supplies continuous loads or anycombination of continuous and noncontinuous load,the rating of the overcurrent device shall not be lessthan the noncontinuous load plus 125 percent of thecontinuous load.

Where the assembly including the overcurrent devicesprotecting the feeder(s) are listed for operating at 100percent of their rating, neither the ampere rating of theovercurrent device nor the ampacity of the feederconductors shall be less than the sum of thecontinuous load plus the noncontinuous load.

Feeder Loading

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Permitted Reductions A service or feeder supplyingthe household electric ranges, wall mounted ovens,counter mounted cooking units and electric dryers arepermitted to have as additional demand factor of 70%for the portion of the unbalance load in excess of the200 A load

Prohibited Reductions There shall be no reductionof the neutral or grounded conductor capacity appliedto any portion of 3 wire circuit consisting of 2 phaseand neutral of 4 wire, 3 phase wye connected system

Additional feeders capacity the load is in excess of2000 A and the supply is 600 V

Feeder Loading

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Type of DemandOccupancy

Potion of Lighting Load toWhich DF Apply DF

Dwelling UnitsFirst 3,000 or lessFrom 3,001 to 120,000Remainder Over 120,000

1003525

Hospitals First 50,000 or LessRemainder Over 50,0004020

Hotels and Motels Including ApartmentHouse

First 20,000 or lessFrom 20,001 to 100,000Remainder Over 100,000

504030

Warehouse First 12,500 or lessRemainder Over 12,50010050

All Others Total VoltAmpere 100

Feeder Demand Factors for GeneralLighting Load and Small Appliance Load

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Conductors-Wires and Cables

Factors that affect conductor sizes1. Continuous loads2. Terminal temperature ratings3. Conductor insulation4. Conductor ampacity5. Special application6. System voltage7. Number of conductors in raceways

No of strand =3n2 - 3n +1

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5.5 sq mm 600 V THHN

Wire GaugeOperating Voltage

Thermoplastic InsulationAmbient Temperature Level

Outer Layer Covering

Branch Circuit conductor that supply load shall have anampacity not less than 2.0 sq mm

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Conductors-Wires and CablesC = CottonFEP = Fluorinated Ethylene PropyleneMI = Mineral magnesium oxidePFA = PerfluoroalkoxyR = Rubber sometimes NeopreneS = Silicone "rubber"SA = Silicone-asbestosT = ThermoplasticTA = Thermoplastic-asbestosTFE = Polytetrafluoroethylene "Teflon"X = Cross-linked synthetic polymerZ = Modified ethylene tetrafluoroethylene

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Conductors-Wires and CablesHeat Ratingno H (ex TW, UF) = 60 degrees CelsiusH = 75 degrees CelsiusHH = 90 degrees Celsius

Outer Covering JacketN = Nylon

Special Service ConditionsU = UndergroundW = Wet

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Short CircuitTemperature =150 degreesCelsius

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Cu Al

IAl = 84 % ICu

Cu Al

Acu = 84 % AAl

2.0 sq mm 2.0 sq mm

15 A 15 A

Conductor Correction Factor

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LV 1kV and Below120, 120/240, 208Y/120, 240, 347, 480Y/277, 480, 600Y/347, 600

MV 1 kV to 34.5 kV4.16 kV, 13.8 kV, 21 kV, 22 kV, 34.5 kV

HV 34.5 kV to 230 kV69 kV, 115 kV, 230 kV

Voltage Class

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Voltage ClassElectric Field

Magnetic Field

VoltageCurrent

The higher the operating voltage the thicker the insulationrequirementBIL (Basic Insulation Impulse Level)

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Voltage Class

Conductors of Different systems can occupy the sameraceway, cables, or enclosures if the insulation voltagerating is not less than the maximum circuit voltage

480 V600 V120 V

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Voltage Drop

Voltage Drop depends on theload current, conductor size,distance of load to supplyand temperature

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Conduit Fill

4 -6 807-9 7010-20 5021-30 4531 -40 4041 and above 35

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Ampacity Derating Factor

600 mm

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Color Coding

White or Gray NeutralRed and/or Black HotGreen - Grounding

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Color Coding

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Conductor Size and Support

Voltage Application Size for span less than15 mSize for span less than

15 m600 Volts or less 5.5 sq mm Copper 8.0 sq mm Copper600 Volts or less 8.0 sq mm Aluminum 14.0 sq mm Aluminum600 Volts or more 14.0 sq mm Copper 8.0 sq mm CableCopper600 Volts or more 22.0 sq mm Aluminum 14.0 sq mm CableAluminum

Festoon Lighting Overhead conductor shall not be smaller than 3.5sq mm copper unless the conductor is supported by a messengerwire. In span exceeding 12 m there shall be messenger wire.

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Service Entrance

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600 Volts, Nominal, or Less. Conductors of 600 volts, nominal, orless, shall comply with the spacing provided in PEC

Over 600 Volts, Nominal. Conductors of over 600 volts, nominal, shallcomply with the spacing provided in PEC

Separation from Other Circuits. Open conductors shall be separatedfrom open conductors of other circuits or systems by not less than100 mm.

Service Entrance

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Conductors on Poles. Conductors on poles shall have a separation ofnot less than 300 mm where not placed on racks or brackets.Conductors supported on poles shall provide a horizontal climbingspace not less than the following:

1. Power conductors below communications conductors 760 mm

2. Power conductors alone or above communications conductors:a. 300 volts or less 600 mm.b. Over 300 volts 760 mm.

3. Communications conductors below power conductors same aspower conductors

4. Communications conductors alone no requirement

Service Entrance

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Overhead spans of open conductors and open multi-conductor cablesof not over 600 volts, nominal, shall conform to the following:

3000 mm above finished grade, sidewalks, or from any platform orprojection from which they might be reached where the voltage doesnot exceed 150 volts to ground and accessible to pedestrians only

3600 mm over residential property and driveways, and thosecommercial areas not subject to truck traffic where the voltage doesnot exceed 300 volts to ground

4500 mm for those areas listed in the 3700 m classification wherethe voltage exceeds 300 volts to ground

5500 mm over public streets, alleys, roads, parking areas subjectto truck traffic, driveways on other than residential property, andother land traversed by vehicles, such as cultivated, grazing, forest,and orchard

Service Drop

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Above Roofs. Conductors shall have a vertical clearance of not lessthan 2500 mm from the roof surface. The vertical clearance shallbe maintained for a distance not less than 900 mm in all directionsfrom the edge of the roof.

Horizontal Clearances. Clearances shall not be less than 1000 mm

Clearance from Windows. Final spans to the building they supply,or from which they are fed, shall be permitted to be attached tothe building, but they shall be kept not less than 900 mm fromwindows that are designed to be opened, and from doors, porches,balconies, ladders, stairs, fire escapes, or similar locations.

Zone for Fire Ladders. Where buildings exceed three stories or 15meters in height, overhead lines shall be arranged, wherepracticable, so that a clear space (or zone) at least 1800 mm widewill be left either adjacent to the buildings or beginning not over2500 mm from them to facilitate raising of ladders when necessaryfor fire fighting.

Service Drop

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Service Equipment Enclosed or Guarded. Energizedparts of service equipment shall be enclosed asspecified below,

Enclosure - Energized parts shall be enclosed so thatthey will not be exposed to accidental contact or guarded

Guarded - Energized parts that are not enclosed shallbe installed on a switchboard, panelboard, or controlboard and guarded. Such an enclosure shall be providedwith means for locking or sealing doors giving access toenergized parts

Grounding and Bonding - Service equipment,raceways, cable armor, cable sheaths, etc., and anyservice conductor that is to be grounded shall begrounded

Service Equipment

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Common Neutral -The ampacity of the neutral conductor shall notbe less than the maximum net computed load current between theneutral and all ungrounded conductors connected to any one phaseof the circuit.

277 Volts to Ground - Circuits exceeding 250 volts nominal,between conductors and not exceeding 277 volts nominal, to groundshall be permitted to supply lighting fixtures for illumination ofoutdoor areas of industrial establishments, office building,institutionals, stores, and other commercial or public buildings wherethe fixtures are not less than 900 mm from windows, platforms, fireescapes, and the like.

600 Volts Between Conductors - Circuits exceeding 277 voltsnominal, to ground and not exceeding 600 volts nominal, betweenconductors shall be permitted to supply the auxiliary equipment ofelectric-discharge lamps

Lighting Equipment on Poles orOther Structure

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Wiring on Buildings - The installation of outside wiring on surfacesof buildings shall be permitted for circuits of not over 600 voltsnominal as open wiring on insulators, as multiconductor cable, asType MC cable, as Type MI cable, as messenger supported wiring,in rigid metal conduit, in intermediate metal conduit, in rigidnonmetallic conduit, in cable trays, as cablebus, in wireways, inauxiliary gutters, in electrical metallic tubing, in flexible metalconduit, in liquid-tight flexible metal conduit, liquid-tight flexiblenonmetallic conduit, and in busways.

Open-Conductor Supports - In spans exceeding 12 metres, theconductors shall be supported by a messenger wire; and themessenger wire shall be supported by strain insulators. Conductorsor messenger wires shall not be attached to any fire escape,downspout, or plumbing equipment

Lighting Equipment on Poles orOther Structure

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Service Entrance

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Rating of Disconnect One Circuit Installation For a limited load the rating

shall not be less than 15 A Dwelling Unit With a single branch circuit the

disconnect shall not be smaller than 20 A Two Circuit Installation For not more than two 2 wire

branch circuit the disconnect shall have a rating of notless than 30 A

One Family Dwelling The feeder disconnecting meansshall have a rating of not less than 60 A

All Others shall not have a rating of not less than 30 A

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Methods of Grounding Grounding can be divided into two areas: system

grounding and equipment grounding. These two areas are kept separate from each other

except at the point where they receive their source ofpower, such as at the service equipment or at aseparately derived system.

Grounding is the intentional connection of a current-carrying conductor to ground or something that servesin place of ground.

In most instances, this connection is made at the supplysource, such as a transformer, and at the main servicedisconnecting means of the premises using the energy.

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Methods of Grounding There are three basic reasons for grounding:To limit the voltages caused by lightning or byaccidental contact of the supply conductors withconductors of higher voltage

To stabilize the voltage under normal operatingconditions (which maintains the voltage at one levelrelative to ground, so that any equipment connectedto the system will be subject only to that potentialdifference)

To facilitate the operation of overcurrent devices,such as fuses, circuit breakers, or relays, underground-fault conditions

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On AC premises wiring systems, the conductor to begrounded shall be as specified in the following:1. Single-phase, 2-wire one conductor2 .Single-phase, 3-wire the neutral conductor3. Multiphase systems having one wire common to allphases the common conductor4. Multiphase systems where one phase is grounded one phase conductor5. Multiphase systems in which one phase is used as in 2 the neutral conductor

Grounding System

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Grounding System

Used green color as grounding conductor

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Grounding System

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Grounding System

The grounding rodresistance shouldbe 25 ohms or less

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On AC premises wiring systems, the conductor to be groundedshall be as specified in the following:1. Single-phase, 2-wire one conductor2 .Single-phase, 3-wire the neutral conductor3. Multiphase systems having one wire common to all phases thecommon conductor4. Multiphase systems where one phase is grounded one phaseconductor5. Multiphase systems in which one phase is used as in 2 theneutral conductor

Grounding System

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Neutral Conductor

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Cable Trays - Are open raceway like assemblies made of steelaluminum or a suitable non-metallic material they are used inbuildings to route cables and support them out of the way ofnormal building activities

Trough Type Trays - Protect cables from damages and give goodsupport and ample ventilation through straight sections

Ladder Trays - Provide maximum ventilations to power cablesand other heat-producing cables

** Cables suitable for use in cable trays are marked CT (Cable Tray)on the outside of the jacket

Raceway Methods and Materials

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Electrical System Protection BasicComponents

Voltage transformers and current transformers: Tomonitor and give accurate feedback about thehealthiness of a system.

Relays: To convert the signals from the monitoringdevices, and give instructions to open a circuit underfaulty conditions or to give alarms when the equipmentbeing protected, is approaching towards possibledestruction.

Fuses: Self-destructing to save the downstreamequipment being protected.

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Electrical System Protection BasicComponents

Circuit breakers: These are used to make circuitscarrying enormous currents, and also to break the circuitcarrying the fault currents for a few cycles based onfeedback from the relays.

DC batteries: These give uninterrupted power source tothe relays and breakers that is independent of the mainpower source being protected

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0 5 10 15-1

-0.5

0

0.5

1

Time in cycles

Voltageinpu

IF= 5 pu

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TR

CB

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Motor Installation

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Multiple Motor InstallationFeeder Rating = 125 % HFLA in a group + 100 % sum ofOther FLA in a group

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Multiple Motor InstallationInverse Time Setting = 250 % HFLA in a group + 100 %sum of Other FLA in a group

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Motor Installation

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Wiring Methods

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Drives, Excitation and Regulation

Exciter

AC MotorDC Generator

PowerDrives

ExcitationSystem

Automatic Control

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Generator Operation The Generator Spins above synchronous speed Mechanical Energy is Transformed into Kinetic Energy

and is Converted into Electrical Energy Delivers Active Power to the Electrical System The Electrical System must provide Reactive Power for

the creation of Magnetic Field High Engine speeds produced greater electrical output

Exciter

Prime MoverGeneratorLoad

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Generator Operation The Generator size is affected by the rating, enclosure

and the application Typical prime mover is a diesel engine Power Rating is expressed in Watts Generator exciter provides residual magnetism As the load of Generator increases the frequency

decreases

Exciter

Prime MoverGeneratorLoad

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Power Measurement

ExciterGenerator

Load

Wattmeter Ammeter Voltmeter

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Surge Arrester Selection Circuits of Less Than 1000 Volts. The rating of the surge

arrester shall be equal to or greater than the maximumcontinuous phase-to-ground power frequency voltageavailable at the point of application.

Surge arresters installed on circuits of less than 1000volts shall be listed for the purpose.

Circuits of 1 kV and Over Silicon Carbide Types. Therating of a silicon carbide-type surge arrester shall benot less than 125 percent of the maximum continuousphase-to-ground voltage available at the point ofapplication.

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Connecting Surge Arrester Installed at Services of Less Than 1000 Volts. Line and ground connecting conductors shall notbe smaller than 14 AWG copper or 12 AWGaluminum. The arrester grounding conductorshall be connected to one of the following:Grounded service conductorGrounding electrode conductorGrounding electrode for the serviceEquipment grounding terminal in the serviceequipment

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Surge Arrester Selection Line and ground connecting conductors shall not be

smaller than 14 AWG copper or 12 AWG aluminum. A surge arrester shall be permitted to be connected

between any two conductors ungroundedconductor(s), grounded conductor, groundingconductor.

The grounded conductor and the grounding conductorshall be interconnected only by the normal operation ofthe surge arrester during a surge.

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Surge Arrester Selection Circuits of 1 kV and Over Surge-Arrester Conductors. The conductor between the surge arrester and the line

and the surge arrester and the grounding connectionshall not be smaller than 6 AWG copper or aluminum.

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Lightning arrester are protective devices for limitingsurge voltages due to lightning strikes or equipmentfaults or other events, to prevent damage to equipmentand disruption of service.

Lightning Arrester

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Armored Cable ( AC, ACT, and ACL ) - fabricated assembly ofinsulated conductors enclosed in a flexible metal sheath usedboth in exposed and concealed work for branch circuit andfeeders in both exposed and concealed work and in cable traywhere identified for such use.

Metal Clad Cable ( MC ) - factory assembled cable of one ormore conductors, each individually insulated and enclosed ina metallic sheath interlocking tape, or a smooth or corrugatedtube, used specifically for services, feeders, branch circuit,either exposed or concealed, and for indoor or outdoor work.

Metal Insulated Cable, Metal Sheathed Cable ( MI ) - factoryassembled cable of one or more conductors insulated withhighly compressed refractory mineral insulation and enclosedin a liquid tight and gas tight continuous copper sheath, usedin a dry , wet, or continuously moist location as in service,feeders, or branch circuits, indoors or outdoors, exposed orconcealed.

Cable Wiring Methods andMaterials

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Non-metallic Sheated Cable (NM and NMC) - factory assembledtwo or more insulated conductors having a moisture resistant,flame retardant and non-metallic outer sheath. used specificallyfor one or two family dwellings, multifamily dwellings and otherstructure

Shielded Non-metallic Sheated Cable (SNM) - A factoryassembled two or more insulated conductors in an extruded coreof moisture resistant and flame resistant non-metallic, coveredwith an overlapping spiral metal tape and wire shield andjacketed with an extruded moisture, flame, oil, corrosion, fungusand sunlight resistant non-metallic material. Used whereoperating temperature do not exceed the rating worked on thecable

Service Entrance Cable (SE & USE) - A single or multi-conductorassembly provided with or without an overall covering, primarilyand for services. Used for installation in cable trays, raceways orwhere supported by a messenger wire


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Underground Feeder and Branch Circuit Cable (UF) - Amoisture resistant cable. Used for underground, includingdirect burial in the earth, as feeder or branch circuit cable

Power & Control Tray cable (TC) A factory assembled two ormore insulated conductors with or without associated bare orcovered grounded conductor under nonmetallic sheath.

Flat Cable Assemblies (FC)- An assembly of parallelconductors formed integrally with an insulating material webspecially designed for field installation in metal surfaceraceway. Used for branch circuit not exceeding 30 amperesand in locations where they will not be exposed to severephysical damage.


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Flat Conductor Cable (FCC) - Consists of three or more flatcopper conductor placed edge to edge & separated andenclose within an insulating assembly. Used for generalpurpose and appliance branch circuits and for individualbranch circuits specifically in hard, smooth, continuous floorsurfaces specially for under carpet (up to 914 mm2) wiring tofloor outlets (floor mounted type FCC).

Medium Voltage Cables (MV) - single or multi-conductor soliddielectric insulated cable rated at 2,001 or higher. Used forpower system up to 35,000 volts nominal, in wet or drylocations, in raceway, cable trays.

Integrated Gas Spacer Cable (IGS) - A factory assembledcable of one or more conductors, each individually insulatedand enclosed in a loose fit nonmetallic flexible conduit rated 0 600 V.


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Integrated Gas Spacer Cable (IGS) - A cable and conduitsystem for underground use, including direct burial in theearth, as service-entrance conductors or as feeder or branchcircuit conductors advantages include low material andinstallation cost, eliminate field pulling or cables into conduitand eliminates the cost of assembly of conduit in the field.Uses SF6 (sulfuric hexafluoride gas) insulation.


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Raceways - The raceways wiring accessories or channelsdesigned for holding wires cables, or busbars which are eithermade of metal or any insulating material. They providedmechanical protection to conductors while keeping themaccessible for wiring changes: conduits connectors, conduit,coupling, clamps, hangers etc. cable trays, bus metal raceway,non-metal raceways.

Conduits - Either pipes or tubing, which are either flexible or rigidfor electric wires. The most common electrical raceways.

Fittings - Accessories such as locknuts, bushing couplers,adapters nipples and connectors or other part wiring system that isintended primarily to perform a mechanical rather than function.

Connectors - A metal sleeve, usually made of copper, that isslipped over and secure to the butted ends conductors in making ajoint. Also called a splicing sleeve.


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Intermediate Metal Conduit (IMC) - A metal raceway of circularcross-section with integral or associated couplings, connectors andfittings approved for the installation of electrical conductors haswall thickness less than rigid metal conduit but greater than EMTused in all atmospheric conditions and occupancies, or areassubject to severe corrosive influences when protected by corrosionprotection

Rigid Metal Conduit - Similar to that of IMC and when installed inconcrete or in contact with coil, it does not generally requiresupplementary corrosion protection unless subject to severecorrosive influences

Rigid Non-metallic Conduit - Resistant to moisture and chemicalatmospheres underground materials, fiber, soapstone, rigid polvinylchloride (PVC), fiberglass, epoxy, and high density polyethylene,above ground (PVC)


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Electrical Metallic Tubing - General purpose raceway of thesame nature as rigid metal conduit and IMC used for both exposedand concealed work where it will not be subjected to severephysical damage or (unless suitably protected) to corrosive agents

Flexible Metallic Tubing - Circular in cross-section, flexible,metallic and liquidtight without a nonmetallic jacket used in drylocations, in accessible locations when protected from physicaldamage or concealed such as above suspended ceilings andbranch circuits

Surface Metal Raceway - Used for exposed wiring where thepossibility of severe physical damage is not a problem restricted todry locations and voltages under 300 volts its principal use is forrewiring or extending existing electrical system.


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Under Floor Raceways - Called under floor ducts, consist ofseparate duct system buried in the concrete floor or flush withsurface of the floor it come complete with junction boxes andfittings to provide access along the length of the duct forreceptacles and telephone outlets may consists of single, double,or triple ducts run parallel to provide telephone signal and powerraceways.

Wire ways - Ducts with square or rectangular cross-section madeof sheet metal and the standard length of each ducts is 10 feetwhere the wiring is readily accessible through cover plates, whichmake up one of the walls of the ducts, is 10 feet cover plates maybe hinged or unhinged, screwed in place, or merely snapped intoplace cannot be buried, concealed in walls or exposed tocorrosives atmosphere for in general they are mounted exposedoutdoors and may carry systems rated at 600 volts.


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Cellular Floor Raceways - Maybe metal or concrete, where cellsof the cellular floor system is assigned with particular usage forpower or signal wiring, and a header ducts tap into the cells and acarry the wiring to the necessary panel board or boxes.

Busways - An approved completely assembled metal troughingand fitting when contain bare conductors intended for use asfeeders, the conductors being suitably supported of insulators.Factory made systems of copper of aluminum bars, rods, or tubesdesigned to carry heavy currents from 50 to 6,000 amp conductorscan be solid bars, square or rectangular hollow tube hollow ovalsor solid 1 beams. Can be mounted horizontally or vertically andcan be also used as service entrance feeders.


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Continuous plug in Busways - used to serve equipment thatmay be relocated periodically, such as in wood working shops.Have regularly spaced openings that permitted plugging ofswitches or circuit breakers and conduit or flexible cable is then runfrom devices to the equipment being served.

Trolley Busways - Permits travelling equipment to be connectedto a power source a rolling power takeoff in contact with thebusways conductors as the equipment moves, the trolley contacton the conductor.

Cablebus - An approved assembly of insulated conductors withfittings and conductor terminations in a completely enclosed,ventilated protective metal housing


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Electrical System Design

Receptacle spacing = 1800 mmfrom the door

Riser Diagram/Distribution System

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Thank You

Philippine Electrical Code for RME Hacked

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Transcript of Philippine Electrical Code for RME Hacked