NEC Code Questions Practice Test-16

Question 1: What is the maximum voltage drop in branch conductor recommended by NEC ?

• 2 %
• 3 %
• 5 %
• 6 %

Question 2: what is the minimum general lightening load required for 3500 square foot ware house as permitted by NEC ?

• 700 VA
• 3500 VA
• 7000 VA
• 4500 VA

NEC Reference: NEC 220.12

Question 3: If a 20 ampere AC snap switch is used to disconnect a 1.5 HP motor what must be the maximum full load current of a motor?

• 16 amperes
• 20 amperes
• 15 amperes
• 17 amperes

NEC Reference: NEC 430.109(C)(2)

Question 4: What is the maximum continuous load that can be connected to 240 volts 20 ampere branch circuit?

• 16 amperes
• 20 amperes
• 14 amperes
• 10 amperes

NEC Reference: NEC 210.20

Question 5: In a single family dwelling unit when four or more appliances are fastened in a place and connected to the same feeder then ....... percent demand factor can be applied in calculating total demand load.

• 75
• 85
• 83
• 90

Question 6: What is the the minimum size copper wire that can be used for outside overhead wiring, if the wire carries more than 600 volts?

• No. 6 AWG
• No. 8 AWG
• No. 10 AWG
• No. 12 AWG

NEC Reference: NEC 225.6(A)(2)

Question 7: What is the maximum allowable voltage between two adjacent snap switches are receptacles placed in a enclosure?

• 300 volts
• 240 volts
• 480 volts
• 120 volts

NEC Reference: NEC 404.8(B)

Question 8: Which of the following is the smallest size fixture wire allowed?

• No . 18 AWG
• No . 12 AWG
• No . 14 AWG
• No . 20 AWG

NEC Reference: NEC 410.54(B)