NEC Code Questions Practice Test-19

Question 1: What is the maximum 3 phase load that can be connected on a 220 ft 8 THWN , 480 volts conductor without exceeding the NEC recommended voltage drop?

• 40 KVA
• 45 KVA
• 48 KVA
• 44 KVA

NEC Reference: NEC 14.4

Question 2: What is the minimum general lighting load required for a 1500 square feet ware house as permitted by NEC?

• 375 VA
• 1500 VA
• 585 VA
• 1245 VA

Question 3: A 240 volts single phase room air-conditioner rating not more than ............. can be consider as a single motor unit?

• 30 amperes
• 40 amperes
• 50 amperes
• 60 amperes

NEC Reference: NEC 440.62(A)(2)

Question 4: If a replacement motor compressor draws 48 amperes , what s the minimum rating of disconnect means?

• 46 amperes
• 40 amperes
• 50 amperes
• 44 amperes

NEC Reference: NEC 440.12(A)(1)

Question 5: The single phase switches can be used to control the motors when they are rated at ......... horse power or less.

• 1/2
• 1/4
• 3/4
• 1

Question 6: What should be the maximum percentage cross sectional area of a conduit that should be occupied when three or more THW conductors are placed in a conduit?

• 40 %
• 25 %
• 30 %
• 45 %

Question 7: What is the resistance offered by electric heater rated 1800 watts at 120 volts?

• 8 ohms
• 15 ohms
• 6 ohms
• 12 ohms

Question 8: Intrinsically safe conductors are identified by ..............

• red
• black
• blue
• brown

NEC Reference: NEC 504.80(C)

Question 9: Which of the following is the smallest conductor permitted for pool equipment is :

• 8 AWG
• 12 AWG
• 10 AWG
• 6 AWG

NEC Reference: NEC 680.26(B)