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Philippine Electrical Code...

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PHILIPPINE ELECTRICAL CODE 1.

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Surrounded by a case, housing, fence, or walls that prevent from accidentally contacting energized part is ENCLOSED. ISOLATED means that equipment is not readily accessible to persons unless special means for access are used.

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load and no load; or (2) load and rest; or load, no load and rest is called INTERMITTENT duty.

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An electrical outlet constructed so that moisture will not enter the enclosure is classified as being WATERTIGHT.

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The AMPACITY is the current in amperes a conductor can carry continuously under the conditions of use without exceeding its temperature rating. Encased with a material or composition or thickness that is not recognized by the code as electrical insulation is defined as a COVERED CONDUCTOR. Covered, shielded, fenced or enclosed by means of suitable covers, casings, barriers, rails, screens, mats, or platforms is the definition of GUARDED. The overhead service conductors from the last pole or other aerial support to and including the splices, if any, connecting to the service entrance conductors at the building or other structure is the SERVICE DROP. Interior locations protected from weather but subject to moderate degree of moisture, such as basements, some bars, some cold-storage warehouses and the like, the partially protected locations under canopies, marquees, roofed open porches, and the like, shall be required fixtures marked “suitable for DAMP locations”.

10. A fitting is PART OF THE WIRING SYSTEM THAT IS INTENDED PRIMARILY TO PERFORM A MECHANICAL FUNCTION. 11. Without live parts exposed to a person on the operating side of the equipment is called DEAD FRONT. 12. A conductor encased within material of composition or thickness not recognized by the code is a COVERED conductor. 13. WEATHERPROOF means so constructed or protected that exposure to the weather will not interfere with its successful operation. 14. The definition of automatic self-acting, operating by its own mechanism when actuated by some

impersonal influence such as A CHANGE IN CURRENT STRENGTH, TEMPERATURE, AND MECHANICAL CONFIGURATION. 15. Only wiring methods recognized as SUITABLE are included in the code. 16. An accessible conductor is NOT PERMANENTLY ENCLOSED BY A STRUCTURE. 17. The definition of ambient temperature is THE TEMPERATURE OF THE AREA SURROUNDING THE CONDUCTOR 18. A COVERED conductor is one having one or more layers of non-conducting materials that are not recognized as an electrical insulation. 19. The definition of a dry location IS NOT NORMALLY SUBJECTED TO DAMPNESS, NOT NORMALLY SUBJECTED TO WETNESS, AND MAY BE TEMPORARILY SUBJECTED TO WETNESS. 20. VARYING duty is a type of service where both the load and the time intervals may have wide variations. 21. A requirement of service that demands operation for alternate intervals of (1) load and no load; or (2) load and rest; or load, no-load and rest is called INTERMITTENT duty. 22. Continuous load is A LOAD WHERE THE MAXIMUM CURRENT IS EXPECTED TO CONTINUE FOR THREE HOURS OR MORE. 23. Concealed is MADE INACCESIBLE BY THE STRUCTURE OR FINISH OF THE BUILDING 24. GROUNDED CONDUCTOR is a system or circuit conductor that is intentionally grounded. 25. Approved is ACCEPTABLE TO THE AUTHORITY HAVING JURISDICTION 26. A system which will automatically furnish lighting and/or power to specified areas and/or equipment when there is a failure of the normal supply is known as a EMERGENCY system. 27. An isolating switch which is one that is INTENDED FOR CUTTING OFF AN ELECTRICAL CIRCUIT FROM ITS SOURCE OF POWER 28. In an electric mixer intended for travelling in and out of an open mixing tank shall be considered PORTABLE utilization equipment.

29. An assembly that has concealed parts from process of manufacturing and cannot be inspected before being installed at a building site without disassembly, damage, or destruction, is a definition of CLOSED CONSTRUCTION.

41. For equipment rated 1200 amperes or more and over 1900mm wide containing overcurrent devices, switching devices or control devices, there shall be one entrance not less than 600mm wide and 2000mm high at each end.

30. An INTEGRATED ELECTRICAL SYSTEM is a unitized segment of an industrial wiring system in which orderly shutdown is necessary to ensure safe operation.

42. 1 entrance to the working space is required where the required work space is doubled.

31. OFFSET is the distance measured along the enclosure wall from the axis of the centerline of the terminal to a line passing through the opening in the enclosure.

43. In all cases, where there are energized parts normally exposed on the front of switchboards, or motor control centers, the working space in front of such equipment shall not be less than 1000mm.

32. The definition of a bathroom is an area including a SLIDING GLASS DOOR with one or more of the following; a toilet, a tub, or a shower.

44. 1900mm is the minimum headroom of working spaces about service equipment, switchboard, panelboard, or motor control circuits.

33. COVER is defined as the shortest distance measured between a point on the top surface of any direct buried conductor, cable, conduit, or other raceway and the top surface of the finished grade.

45. 500,000 is the insulation resistance for circuits of 2.0mm2 or 3.5mm2 conductors. 46. A wall, screen or fence less than 2500mm in height shall not be considered as preventing access.

34. INTERLOCK is a device actuated by the operation of some other device with which it is directly associated, to govern succeeding operations of the same or allied devices. 35. Electrical plans and drawings shall be drawn on sheets of the standard sizes 760mm x 1,000mm, 600mm x 900mm, and 500mm x 760mm except 760mm x 900mm. 36. Connection by means of wire binding screws or studs and nuts having upturned lugs or equivalent shall be permitted for 5.5mm2 or smaller conductors.

37. 1:100 scale shall be used for floor/deck and riser/profile plans. 38. Title block or nameplate of plans and drawings shall be a standard strip of 40 mm high.

47. A minimum working space of 800 horizontally shall be provided where rear access is required to work on deenergized parts on the back of enclosed equipment. 48. Illumination shall be provided for all working spaces about service equipment, switchboards, etc. installed indoors except service equipments, panelboards in dwelling units that do not exceed 200 amperes.

49. Energized parts of electrical equipment operating at 50 volts or more shall be guard against accidental by having it elevated 2500mm above the floor or other working surface. 50. 1.0 meg-ohm per thousand volts or fraction thereof is the minimum insulation resistance for voltage above 600 volts.

39. If potentials exceeding 600 volts are employed, a permanent warning sign shall be displayed in conspicuous places forbidding anyone to work on energized equipment or circuit.

51. In all cases the workspace about equipment shall be adequate to permit at least a 90˚degree opening of doors or hinged panel.

40. At least 1 entrance of sufficient area shall be provided to give access to the working space about electrical equipment.

52. KEPT LOCKED the entrances to all buildings, rooms, or enclosure containing exposed energized parts or exposed conductors operating over 600 volts. -----------------------------------------------------------------------------------------------------------------------------

53. The elevation of unguarded energized parts above working space if the nominal voltage between phases is 7501 – 35000 volts is 2800mm. 54. Equipment is required to be installed and used according to its LISTED AND LABELED instructions.

55. All wiring shall be installed so that the completed system will be free from SHORT CIRCUITS AND GROUNDS. 56. Electrical equipment that depends on the ARTIFICIAL COOLING AND CIRCULATION principle of cooling exposed surfaces shall be installed so that airflow over such surface will not be prevented by walls or by adjacent installed equipment.

57. Sufficient access and WORKING SPACE shall be provided and maintained about all electrical equipment to permit ready and safe operation and maintenance of such equipment. 58. When live parts of electrical equipment are guarded by suitable permanent, substantial partitions, or screens, any opening such partitions or screens shall be sized and located that persons are not likely to cause into accidental contact with live parts or to bring CONDUCTING OBJECTS into contact with them.

59. Opening in ventilated dry type TRANSFORMERS or similar opening in other equipments over 600V shall be designed so that foreign objects inserted through this openings will be deflected from the energized parts. 60. Entrance to rooms and other guarded locations containing live parts marked conspicuous WARNING SIGNS forbidding unqualified persons to enter.

61. When normally enclosed live parts are exposed for inspection or servicing, a passageway in general open space shall be suitably GUARDED. 62. Concrete, brick, or tile shall be considered as SHIELDED as it applies to working space requirements.

65. Working space hall not be used for STORAGE. 66. Unless otherwise specified, the live parts of electrical equipment operating at 50V volts or more shall be guarded.

67. Entrances to rooms and other guarded locations containing exposed live parts shall be marked with CONSPICUOUS warning signs. 68. Circuits not exceeding 230 volts, nominal, between conductors shall be permitted to supply the AUXILIARY EQUIPMENT OF ELECTRIC DISCHARGE LAMP and CORD and PLUG CONNECTED UTILIZATION EQUIPMENT.

69. Circuits exceeding 230 volts, nominal between conductors and not exceeding 277 volts, nominal, to ground shall be permitted to supply the LISTED ELECTRIC DISCHARGE LUMINAIRES (lightning fixtures), LISTED INCANDESCENT LUMINAIRES (lightning fixtures), AUXILIARY EQUIPMENT OF ELECTRIC DISCHARGE LAMPS and CORD-AND-PLUG CONNECTED UTILIZATION EQUIPMENT. 70. All 125-volt and/or 250-volts, single-phase, 15 and 20 amperes receptacles installed in BATHROOMS, COMMERCIAL AND INSTITUTIONAL KITCHEN, ROOFTOPS, AND OUTDOOR IN PUBLIC PLACES other than dwelling units shall have ground fault circuit interrupter protection for personnel.

71. In addition to the number of branch circuits required, at least one 20-ampere branch circuits shall be provided to supply the LAUNDRY AND BATHROOM ONLY receptacle outlets. This circuit shall have no other outlets. 72. ARC FAULT CIRCUIT INTERRUPTER is a device intended to provide protection from the effects of arc faults by recognizing the characteristics unique to arcing and by functioning to de-energized the circuit when an arc fault is detected.

63. Working space shall be measured from the FRONT or OPENING of equipment or apparatus if such are enclosed.

73. JAN.1, 2014 is the effectivity of the requirement that all 115-volt and/or 230-volt, single –phase, 15 – and 20 – ampere branch circuits supplying outlets installed in dwelling bedrooms shall be protected by a listed arc-fault circuit interrupter, combination type installed to provide protection of the branch circuit.

64. Warning sign for over 600 volts shall read “DANGER HIGH VOLTAGE - KEEP OUT”.

74. 40 amperes is the minimum branch circuit rating for ranges of 8 ¾ kW or more rating.

75. Where a branch circuit supplies continuous load or any combination of continuous load, the minimum branch circuit conductors size before the application of any adjustment or correction shall have an allowable ampacity not less than noncontinuous load plus 125 percent of the continuous load.

88. 24 volt-amperes per square shall be the unit lighting load for dwelling unit.

76. Where connected to a branch circuit having a rating in excess of 20 amperes, lampholders shall be of heavy-duty type.

90. In each dwelling unit, the unit feeder load shall be computed at 1500 volt-amperes for each 2-wire small appliance branch circuit.

77. A heavy duty lampholder shall not have a rating of not less than 660, 750 watts if of any other type.

91. When using optional calculation method for a dwelling unit service, all other load above the initial 10 kW is to be assesses at 40%.

78. The rating of any one cord-and-plug-connected utilization equipment not fastened in place shall not exceed 80 percent of the branch circuit ampere rating. 79. The total rating of utilization equipment fastened in place, other than luminaries shall not exceed 50 percent of the branch circuit ampere rating where lightning units, cord-and-plug-connected utilization equipment not fastened in place or both are also supplied. 80. Branch circuit larger than 50 amperes shall supply only non lightning outlet loads. 81. Appliance receptacle outlets installed in a dwelling unit for a specific appliances such as laundry equipment, shall be installed within 1800mm of the intended location of the appliances. 82. In kitchens and dining areas of dwelling units, a receptacle outlet shall be installed at each corner space wider than 300mm. 83. Receptacles connected to circuits having different voltages, frequencies, or type of current on the ssame premises shall be of such design that the attachment plugs used on these circuit are not INTERCHANGEABLE. 84. NONCOINCIDENT LOAD are loads that are unlikely to be use simultaneously. 85. For a dwelling unit having a floor area not more than 50 square meters, it shall be permitted to have single 20-A 2-wire branch circuit provided that the total load shall not exceed 3,680 volt-amperes. 86. 100% is the demand factor for air-conditioning load. 87. The equipment grounding conductors of a branch circuit shall be identified by a continuous GREEN color.

89. For show window lightning, a load of not less than 600 volt-amperes shall be included for each meter of show window measured horizontally along its base.

92. Conduits bodies enclosing 14mm2 conductors or smaller shall have a cross-sectional area NOT LESS THAN TWICE the cross-sectional area of the largest conduit to which it is attached. 93. The grounded conductor of a branch circuit shall be identified by a continuous WHITE OR GRAY color. 94. At least one receptacle outlet shall be installed directly above a show window for each 3 linear meters or major fraction thereof of show window area measured horizontally at its width. 95. When connected to a branch circuit having a rating in excess of 20 A, lampholders shall be of the heavyduty type. 96. The rating of any one cord and a plug connected utilization equipment shall not exceed 80 percent of the branch circuit ampere rating. 97. In dwelling unit and guest rooms of hotels, motels, or similar occupancies shall not exceed 250 volts between conductors that supply the terminals of lampholders. 98. Ground- Fault Circuit Interrupter (GFCI_protection for personnel as required for all 125-V or 250-V singlephase, 15 or 20 A receptacles that are installed in GARAGE, BATHROOM and CRAWL SPACES. 99. For receptacle outlets, each single or each multiple receptacle on one strap shall be considered at not less than 180 volt-amperes. 100. At least one receptacle outlet shall be installed in BATHROOM, LAUNDRY AREA, BASEMENT AND GARAGE area. 101. In the optional calculation for additional load in existing dwelling, the demand factor for the first 8 kVa of all the loads is 100% while for the remainder of all other loads is 40 percent.

102. For hallways of 3000 mm or more in length at least one receptacle outlet shall be required.

115. In spans, exceeding 12 meters, the conductors shall be supported by a messenger wire; the messenger wire shall be supported by a STRAIN type insulator.

103. The receptacle shall be located on the same level and within 7600 mm of the heating, air conditioning and refrigeration equipment.

116. Conductors or messenger shall not be attached to FIRE ESCAPE, DOWNSPOUT AND PLUMBING EQUIPMENTS.

104. In every kitchen, family room, dining room, living room or similar room or area of dwelling units, receptacles outlet shall be installed so that no point along the floor line in any wall space is more than 1800 mm, measured horizontally from the outlet in that space.

117. Circuits exceeding 277 volts nominal, to ground and not exceeding 600 volts nominal, between conductors shall be permitted to supply the auxiliary equipment of electric discharge lamps.

105. The unit load per square meter in volt-amperes of dwelling units, schools and stores is 24 except HOSPITALS. 106. An outlet for heavy duty lampholders shall be considered as a load of not less than 600 voltamperes based on nominal branch circuit voltage. 107. Using the optional calculation for additional loads in existing dwelling unit, the demand factor the first 8 KVA of load shall be 100% and the remainder of load at 40 %. 108. For hospitals, the demand factor to be applied for the first 50000 volt-ampere load is 40 percent. 109. For non-dwelling receptacle loads demand factor applied for the first 10 kVA or less is 100% while for the remainder over 10Kva at 50. 110. In dwelling units, the voltage between conductors shall not exceed 120 volts nominal between conductors that supply the terminals of LIGHTNING FIXTURES and CORD-AND-PLUG CONNECTED LOADS NOT LESS THAN 1440 VA NOMINAL. 111. For space heating units, the demand factor applied for four or more separately controlled units shall be 40 percent. 112. The load for household clothes dryers in dwelling unit/s shall be 5000 volt-amperes or the nameplate rating, whichever is larger for each dryer served. 113. Festoon lightning is a string of outdoor lights suspended between two points more than 4500 mm apart. 114. Overhead conductors for festoon lightning shall not be smaller than 3.5 mm2.

118. Within 3000 mm of any building or structure, open wiring on insulators shall be insulated or covered. 119. Up to 600 volts nominal or less, open conductors shall not be smaller than 5 mm2 copper, or 8 mm2 aluminum for a span more than 15 meters. 120. Up to 600 volts nominal, open individual conductors shall not be smaller than 8 mm2 copper, or 14 mm2 aluminum for a span more than 15 meters. 121. For over 600 volts nominal, open individual conductors shall not be smaller than 14 mm2 copper, or 22 mm2 aluminum. 122. Conductors on poles shall have a separation of not less than 300 mm where not placed on racks or brackets. 123. Open conductors shall be separated from open conductors of other circuits or systems by not less than 100 mm.

124. Conductors supported on poles shall provide a horizontal climbing space not less than 760 mm for power conductors, below communication conductors. 125. Conductors shall have a vertical clearance of not less than 2500 mm from the roof surface. 126. The vertical clearance from the roof shall be maintained for a distance of not less than 1000 mm on all direction from the edge of the roof. 127. When reading an ungrounded receptacle in a bedroom of a dwelling unit, if a grounding means does not exist in the receptacle enclosure, you must use a NON-GROUNDING RECEPTACLE OR GROUNDING RECEPTACLE. 128. Ground-fault circuit interrupter (GFCI) protection for personnel is required for all 125-V, single phase, 15 and 20 ampere receptacles installed in a dwelling unit GARAGE.

129. All branch circuits that supply 125-volt. 15 and 20ampere receptacles in dwelling unit bedrooms shall be AFCI protected.

143. In dwelling units, when determining the spacing of general use receptacles, on exterior walls , SLIDING PANELS are not considered wall space.

130. Where the load is completed on a volt-amperes-persquare-meter basis, the load shall be evenly proportional among...