Philippine Electrical Code 1. Branch lighting circuits shall be protected by overcurrent devices not rated more than ___________ amperes. A. 30 B. 25 C. 20 D. 35 2. What is the maximum allowable voltage drop from the main circuit breaker to the farthest lamp load? A. 4% B. 6% C. 5% D. 9% 3. The minimum insulation level for neutral conductor of residential installation which has solidly grounded system shall be __________ volts. A. 300 B. 400 C. 500 D. 600 4. Which of the following wires has 75 Ω impedance? A. Coaxial B. Foam-filled twin lead C. Flat twin lead D. None of the above 5. Auxiliary gutters shall not contain more than _________ current carrying conductors at any cross section. A. 24 B. 26 C. 28 D. 30 6. Underfloor raceways may be occupied up to __________ of the area. A. 34% B. 36% C. 38% D. 40%
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Philippine Electrical Code 7. What loading shall be used for each receptacle when estimating the loading of a branch circuit? A. 160 volt-ampere B. 180 volt-ampere C. 200 volt-ampere D. 220 volt-ampere 8. In hazardous location, the use of non-metallic conduit shall be permitted provided it is buried not less than ____________ below the earth level. A. 300 mm B. 400 mm C. 500 mm D. 600 mm 9. Hazardous locations are classified by the Philippine Electrical Code by how many classes? A. 3 B. 4 C. 5 D. 6 10. The primary winding of a step down transformer shall be Protected on the primary side by an overcurrent device rated not more than _________ of the primary current. A. 110% B. 115% C. 120% D. 125% 11. Communication cables and wires shall have a voltage rating not less than _________ volts. A. 100 B. 200 C. 300 D. 400 12. Bonding jumpers which connect communication cable grounding conductor and grounding electrode of the building shall not be smaller than what copper size? A. 12 mm2 B. 14mm2 C. 16mm2 D. 18mm2
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Philippine Electrical Code 13. What is the minimum vertical clearance from a finished grade of service drop conductor installed between buildings on residential properties and driveways? A. 4200 mm B. 4600 mm C. 5200 mm D. 5600 mm 14. What is the minimum electrical trade size for rigid metal conduit? A. 12 mm B. 15 mm C. 20 mm D. 25 mm 15. The total load on overcurrent device located in a panelboard shall not exceed ________ of its rating. A. 80% B. 70% C. 60% D. 50% 16. What is the maximum allowable rating of a cord and plug connected load where receptacle are connected to a 20-A branch circuit? A. 12 A B. 14 A C. 16 A D. 18 A 17. The disconnecting means of motors circuits rated up to 600 volts shall have an ampere rating of at least ___________ of the full load current of the motor. A. 110% B. 115% C. 125% D. 130% 18. What is the maximum allowable distance interval between supports securing busways? A. 1000 mm B. 1500 mm C. 1800 mm D. 2000 mm
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Philippine Electrical Code 19. A continuous electrical load is one where the maximum current is expected to continue for a minimum duration of time. What is this time duration? A. 1 hr B. 2 hrs C. 3 hrs D. 4 hrs 20. Service conductors passing over roofs must have ____________ clearance over the roof which they pass. A. 2000 mm B. 2500 mm C. 3000 mm D. 3500 mm 21. Lamp protection shall be provided by elevation of at least __________ from the normal working surface. A. 1 m B. 2 m C. 3 m D. 4 m 22. What is the standard width of the title block of an electrical plan? A. 30 mm B. 40 mm C. 50 mm D. 60 mm 23. What is the minimum clearance between resistors or reactors to combustible materials? A. 250 mm B. 300 mm C. 350 mm D. 400 mm 24. For service drop conductors not exceeding 600 volts, what is the minimum clearance over commercial areas, parking lot subject to truck traffic? A. 3700 mm B. 4600 mm C. 5500 mm D. 6500 mm
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Philippine Electrical Code 25. For a motor starter to be in sight of the controlled motor, it must not be more than _______ away. A. 10 m B. 15 m C. 20 m D. 25 m 26. A lighting fixture shall be wired with a flexible lighting cord with a cross sectional area not less than _________ sq. mm. A. 0.75 B. 1.00 C. 1.25 D. 1.50 27. Branch circuit conductors supplying a single phase motor shall have an ampacity not exceeding _________. A. 110% B. 115% C. 120% D. 125% 28. What is the multiplying factor for determining the size of branch circuit protection for non-time delay fuse? A. 150% B. 200% C. 250% D. 300% 29. Each transformer up to 600 V nominal shall be protected by an individual overcurrent device on the primary side at not more than __________ of the rated primary current of the transformer. A. 110% B. 115% C. 120% D. 125% 30. What is the clearance to be maintained in concealed knob and tube wiring? A. 56 mm B. 66 mm C. 76 mm D. 86 mm
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Philippine Electrical Code 31. The sum of the cross sectional area of all conductors in a wireway must not exceed ___________ of the cross-sectional area of the wireway. A. 10% B. 15% C. 20% D. 25% 32. In the installation of power resistors, a thermal barrier shall be required if the space between the resistors and any combustible material is less than __________. A. 200 mm B. 300 mm C. 400 mm D. 500 mm 33. What is the minimum depth of clear working space in front of a switchboard rated at 4160 volts, where there are exposed energized parts on both sides of the workspace? A. 1400 mm B. 1900 mm C. 2400 mm D. 2900 mm 34. In switchboard, there shall be an air space of at least ________ between the energized metal part and the door of the cabinet. A. 10 mm B. 15 mm C. 20 mm D. 25 mm 35. The clearance from the top of a switchboard to a ceiling which is combustible shall not be less than _________. A. 1000 mm B. 1250 mm C. 1500 mm D. 2000 mm
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Philippine Electrical Code 36. In general, lay-out of motors and power outlets not exceeding a total of _________ maybe included in the lighting lay-out provided such inclusion will not make the reading, interpretation and/or checking of the said plan is difficult. A. 8 B. 10 C. 12 D. 14 37. What is the minimum insulation resistance of a building’s electrical wiring for circuits using 2 sq. mm or 3.5 sq. mm conductors? A. 100,000 ohms B. 250,000 ohms C. 350,000 ohms D. 500,000 ohms 38. Supports of AC cable should have intervals not exceeding: A. 1000 mm B. 1200 mm C. 1400 mm D. 1500 mm 39. All energized part of electrical equipment operating at __________ or more shall be guarded accidental contacts by approved enclosure. A. 30 volts B. 40 volts C. 50 volts D. 60 volts 40. Equipment rated 1,200 A or more and measuring more than 1,900 mm wide, containing overcurrent devices, shall have an entrance at both ends of the switchboard room. What must be the width and height of each entrance? A. 800 mm wide x 2000 mm high B. 800 mm wide x 2200 mm high C. 600 mm wide x 2000 mm high D. 600 mm wide x 2200 mm high
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Philippine Electrical Code 41. When testing the insulation integrity of a new or old electrical wiring installation circuit of 5.5 sq. mm conductors, what is the minimum insulation resistance? A. 250,000 ohms B. 300,000 ohms C. 350,000 ohms D. 400,000 ohms 42. What is the minimum insulation resistance for voltages above 600 V? A. 1,500,000 ohms per kV rating B. 1,000,000 ohms per kV rating C. 2,000,000 ohms per kV rating D. 2,500,000 ohms per kV rating 43. What color identifies the grounded conductor of a branch circuit? A. Green B. Black C. Blue D. White 44. Insulated ground conductor of 14 sq. mm or smaller shall be identified by a continuous white outer finish along its entire length or another color which is _________. A. Green B. Natural gray C. Striped green D. Striped white 45. A 15-A or a 20-A branch circuit shall be permitted to supply lighting units and other utilization devices. The rating of any one cord and plug connected appliance shall not exceed __________ of the branch circuit rating. A. 80% B. 70% C. 60% D. 50%
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Philippine Electrical Code 46. What refers to the underground service conductors between the street main, including any risers at the pole or other structure or from transformer and the first point of connection to the service entrance conductors in a terminal box? The point of connection is considered to be the point of entrance of the service conductors into the building. A. Service entry B. Service raceway C. Service lateral D. Service drop 47. Cables for 220 kV lines are invariably A. Compressed oil or compressed gas B. Mice insulated C. Rubber insulated D. Plastic insulated 48. What is the demand load of the service for two 3 kW cooktops and two 5 kW ovens? A. 12 kW B. 11 kW C. 15 kW D. 10 kW 49. Motor A has full load current of 8 A and motor B has 10 A. What is the ampacity of the feeder conductor supplying these two motors? A. 9 A B. 18 A C. 20.5 A D. 24.2 A 50. Wires on cables used on dry and wet locations for over 2000 volts insulation and ozone resistant with moisture and resistant rubber and has a maximum operating temperature of 90 deg C is _________ type. A. MI B. RHW C. THW D. THHN
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