NEC Code Questions Practice Test-6

Question 1: What is the minimum size of aluminium conductor used for surge protective devices?

• 12 AWG
• 14 AWG
• 10 AWG
• 8 AWG

Question 2: Which of the following is the standard fuse rating of an electrical fuse as per NEC?

• 45
• 50
• 55
• 60

Question 3: Without applying any de-rating factor for conductor current carrying capacity, how many conductors can run parallel in raceway or cable?

• 4
• 3
• 5
• 6

NEC Reference: NEC 310.15(B)(3)(a)

Question 4: A 120 volts panel has a rating of 50A. What is its maximum over current device rating?

• 50 A
• 62.5 A
• 57.5 A
• 75 A

Question 5: Which of the following is maximum operating voltage of a low voltage lighting system?

• 30 volts
• 25 volts
• 40 volts
• 35 volts

NEC Reference: NEC 411.2

Question 6: The standby power shall be available not more than ……………..

• 30 seconds
• 75 seconds
• 1 minute
• 2 minute

NEC Reference: NEC 701.11

Question 7: In class I division 2 location, unless it is specified the cross sectional area of the conductors permitted in a seal shall not exceed …………. percentage of a cross sectional area of RMC

• 25
• 30
• 40
• 50

NEC Reference: NEC 501.15(C)(6)

Question 8: Branch circuits for heating and air conditioning equipment located in the elevators shall not exceed which of the following voltage?

• 600 volts
• 480 volts
• 240 volts
• 900 volts

NEC Reference: NEC 620.3(C)

Question 9: What is the minimum volume allowance required per a No 14 AWG conductor?

• 1.50 in³
• 1.75 in³
• 2.0 in³
• 2.5 in³

NEC Reference: NEC 314.16(B)

Question 10: Mutli-wire branch circuits shall not be permitted in class I division I locations.

• True
• False

NEC Reference: NEC 501.40