NEC Code Questions Practice Test-7

Question 1: When two different size conductor wires are connected in series, the maximum fuse rating should be used is one that protects ................

• smallest size wire
• Largest size wire
• combination of both smallest size wire and largest size wire

Question 2: What percentage of rated ampacity is allowed for each conductor when eight current carrying conductors are equipped in flexible cords?

• 80
• 70
• 60
• 50

NEC Reference: NEC 400.5(A)(3)

Question 3: The conductor amapcity is 150 amperes. What is the maximum allowed conductor ampacity of each conductor if 5 of those conductors are placed in flexible cord?

• 120 amperes
• 135 amperes
• 140 ampere
• 105 amperes

NEC Reference: NEC 400.5(A)(3)

Question 4: Upto what minimum height the underground conductors must be given mechanical protection if they carried up a pole?

• 8 feet
• 12 feet
• 16 feet
• 6 feet

NEC Reference: NEC 300.5(C)(1)

Question 5: What is the maximum demand for eight wall-mounted ovens, house hold electric ranges and other house hold cooking appliances rated at over 1 ¾ KW each?

• 17 KW
• 23 KW
• 28 KW
• 32 KW

NEC Reference: NEC 220.55

Question 6: What is minimum ampere rating of a heavy duty lighting track?

• 15
• 20
• 25
• 30

NEC Reference: NEC 410.153

Question 7: Which of the following is the ampacity of 4 AWG SE cable?

• 70 A
• 65 A
• 80 A
• 85 A

NEC Reference: NEC 338.10(B)

Question 8: Equipment grounding conductors can be considered as current carrying conductors in some cases?

• False
• True

NEC Reference: NEC 310.15(B)(5)

Question 9: What is the demand factor in percentage for a non-dwelling unit with a receptacle load of 15 kVA?

• 75 %
• 50 %
• 80 %
• 60 %

NEC Reference: NEC 220.44

Question 10: At one end of the feeder the voltmeter reads 240 volts. What is minimum reading voltage in volt-meter at the outlet of lighting loads?

• 232.8 volts
• 240 volts
• 235 volts
• 228 volts

NEC Reference: NEC 215.2(A)(4)