NEC Code Questions Practice Test-11

Question 1: What is the smallest aluminium size wire that can be used as service entrance conductors?

• 8 AWG
• 6 AWG
• 10 AWG
• 12 AWG

NEC Reference: NEC 230.31(B)

Question 2: What should be electrical fuse size to protect 10 AWG conductor?

• 30 amperes
• 20 amperes
• 15 amperes
• 25 amperes

NEC Reference: NEC 240.4

Question 3: For equipment's installed in class I location, which of the following type of bonding is required?

• A bonding jumper
• Double ended jumper
• Hardly bonded
• compression type bonding

NEC Reference: NEC 501.30

Question 4: A 230 volts source is connected 240 volts source. what is the minimum NEC recommended voltage for that load?

• 228 volts
• 230 volts
• 225 volts
• 240 volts

Question 5: What is the calculated load for 3 work stations which has 5 feet multi outlets not simultaneously used and 2feet multi outlets which are used simultaneously?

• 1.62 KVA
• 3.6 KVA
• 1.86 KVA
• 2.96 KVA

NEC Reference: NEC 220.14(H)

Question 6: What is the minimum operating rating of short circuit ground fault protective device that can be used for individual motor-compressor?

• 10 A
• 15 A
• 20 A
• 25 A

NEC Reference: NEC 440.22(A)

Question 7: What is the minimum tap conductor ampacity which supply 30 A industrial heating appliances?

• 10 amperes
• 20 amperes
• 15 amperes
• 18 amperes

NEC Reference: NEC 210.19(A)(4)

Question 8: In a single family dwelling unit what is the minimum allowable rating of a 3 wire service conductors?

• 125 amperes
• 100 amperes
• 150 amperes
• 75 amperes

NEC Reference: NEC 230.42(C)

Question 9: one 6 AWG THHN conductor is good for how many KW at 240 volts?

• 15.6 KW
• 7.8 KW
• 12.5 KW
• 6.5 KW

NEC Reference: NEC 310.15(B)(16)