Philippine Electrical Code

Philippine Electrical Code

1. Branch lighting circuits shall be protected by overcurrent devices not rated more than ___________ amperes.A. 30B. 25C. 20D. 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. 300B. 400C. 500D. 600

4. Which of the following wires has 75 Ω impedance?A. CoaxialB. Foam-filled twin leadC. Flat twin leadD. None of the above

5. Auxiliary gutters shall not contain more than _________ current carrying conductors at any cross section.A. 24B. 26C. 28D. 30

6. Underfloor raceways may be occupied up to __________ of the area.A. 34%B. 36%C. 38%D. 40%

7. What loading shall be used for each receptacle when estimating the loading of a branch circuit?

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A. 160 volt-ampereB. 180 volt-ampereC. 200 volt-ampereD. 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 mmB. 400 mmC. 500 mmD. 600 mm

9. Hazardous locations are classified by the Philippine Electrical Code by how many classes?A. 3B. 4C. 5D. 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. 100B. 200C. 300D. 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

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

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B. 4600 mmC. 5200 mmD. 5600 mm

14. What is the minimum electrical trade size for rigid metal conduit?A. 12 mmB. 15 mmC. 20 mmD. 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 AB. 14 AC. 16 AD. 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 mmB. 1500 mmC. 1800 mmD. 2000 mm

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 hrB. 2 hrs

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C. 3 hrsD. 4 hrs

20. Service conductors passing over roofs must have ____________ clearance over the roof which they pass.A. 2000 mmB. 2500 mmC. 3000 mmD. 3500 mm

21. Lamp protection shall be provided by elevation of at least __________ from the normal working surface.A. 1 mB. 2 mC. 3 mD. 4 m

22. What is the standard width of the title block of an electrical plan?A. 30 mmB. 40 mmC. 50 mmD. 60 mm

23. What is the minimum clearance between resistors or reactors to combustible materials?A. 250 mmB. 300 mmC. 350 mmD. 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 mmB. 4600 mmC. 5500 mmD. 6500 mm

25. For a motor starter to be in sight of the controlled motor, it must not be more than _______ away.A. 10 mB. 15 mC. 20 mD. 25 m

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26. A lighting fixture shall be wired with a flexible lighting cord with a cross sectional area not less than _________ sq. mm.A. 0.75B. 1.00C. 1.25D. 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 mmB. 66 mmC. 76 mmD. 86 mm

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%

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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 mmB. 300 mmC. 400 mmD. 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 mmB. 1900 mmC. 2400 mmD. 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 mmB. 15 mmC. 20 mmD. 25 mm

35. The clearance from the top of a switchboard to a ceiling which is combustible shall not be less than _________.A. 1000 mmB. 1250 mmC. 1500 mmD. 2000 mm

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. 8B. 10C. 12D. 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?

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A. 100,000 ohmsB. 250,000 ohmsC. 350,000 ohmsD. 500,000 ohms

38. Supports of AC cable should have intervals not exceeding:A. 1000 mmB. 1200 mmC. 1400 mmD. 1500 mm

39. All energized part of electrical equipment operating at __________ or more shall be guarded accidental contacts by approved enclosure.A. 30 voltsB. 40 voltsC. 50 voltsD. 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 highB. 800 mm wide x 2200 mm highC. 600 mm wide x 2000 mm highD. 600 mm wide x 2200 mm high

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 ohmsB. 300,000 ohmsC. 350,000 ohmsD. 400,000 ohms

42. What is the minimum insulation resistance for voltages above 600 V?A. 1,500,000 ohms per kV ratingB. 1,000,000 ohms per kV ratingC. 2,000,000 ohms per kV ratingD. 2,500,000 ohms per kV rating

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43. What color identifies the grounded conductor of a branch circuit?A. GreenB. BlackC. BlueD. 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. GreenB. Natural grayC. Striped greenD. 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%

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 entryB. Service racewayC. Service lateralD. Service drop

47. Cables for 220 kV lines are invariablyA. Compressed oil or compressed gasB. Mice insulatedC. Rubber insulatedD. Plastic insulated

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48. What is the demand load of the service for two 3 kW cooktops and two 5 kW ovens?A. 12 kWB. 11 kWC. 15 kWD. 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 AB. 18 AC. 20.5 AD. 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. MIB. RHWC. THWD. THHN

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Philippine Electrical Code