NEC Code Questions Practice Test-8

Question 1: What is the minimum fixture wire size that shall be permitted?

• 12 AWG
• 14 AWG
• 16 AWG
• 18 AWG

NEC Reference: NEC 402.6

Question 2: What size of over current protection device is required for a 24 ampere continuous load where the ambient temperature is 75 ⁰C?

• 30 amperes
• 24 amperes
• 28 ampers
• 26 amperes

NEC Reference: NEC 210.20(A)

Question 3: In multiple parallel circuit paths, the current will always take the path of ...............

• least resistance
• high resistance
• high voltage
• low voltage

Question 4: As mentioned in NEC, a multifamily dwelling unit is the one that contains …………….

• Two or more dwelling units
• Three or more dwelling units
• More than one dwelling unit
• More than two dwelling units

Question 5: What size service conductors are required for a dwelling load with a calculated load is 190 A. The service disconnect breaker is rated at 200 A?

• 1/0 AWG
• 2/0 AWG
• 3/0 AWG
• 4/0 AWG

NEC Reference: NEC 310.15(B)(16)

Question 6: A 400 breaker protects a set of 450 kcmil feeder conductors. A feeder fed from 450 kcmil feeder that supply disconnects with 25 A over current device. What is the minimum size conductor for these tap?

• 8 AWG
• 6 AWG
• 4 AWG
• 16 AWG

NEC Reference: NEC 310.15(B)(16)

Question 7: Which is the minimum size copper conductor is required for the grounding electrode conductor (GEC) connected to a ground rod

• 6 AWG
• 8 AWG
• 4 AWG
• 16 AWG

NEC Reference: NEC 250.166(A)

Question 8: What is the maximum size over current device is required for a 4200 W, 240 V electric water heater connected in a building.

• 25 A
• 30 A
• 35 A
• 40 A

NEC Reference: NEC 26.25

Question 9: What is the maximum allowable conductor fill for 4in * 4 in wireway?

• 16 sq in
• 8 sq in
• 3.2 sq in
• 4.8 sq in

NEC Reference: NEC 376.22(A)

Question 10: How many 10 AWG RHH conductors can be installed in trade size ¾ EMT?

• 3 conductors
• 5 conductors
• 6 conductors
• 8 conductors