ELECTRICAL NEC LEVEL 4 MIDTERM
AND FINAL EXAM 2026 WITH 170
QUESTIONS AND VERIFIED CORRECT
ANSWERS | ALREADY GRADED A+ |
ELECTRICAL NEC LEVEL 4 EXAM 2026
In most cases, feeder conductor size is adjusted when _____. - ANSWER-there are
more than three current-carrying conductors in the raceway
The rules governing the design of circuits supplying power to boats is covered in
_____. - ANSWER-NEC Article 555
When calculating the service requirement for a particular building, the first step is
to _____. - ANSWER-determine the floor area of the building
If a store lighting load is 14,000VA (continuous), which of the following must be
used for the circuit calculation? - ANSWER-17,500VA
1.25 x 14,000VA = 17,500VA
A commercial kitchen with more than six pieces of kitchen equipment is subject to
a demand factor of _____. - ANSWER-65%
,Which of the following lighting loads would be used in a residence that is 1,650
ft2? - ANSWER-4,950VA
1,650 x 3VA per square foot = 4,950VA
The demand lighting load for a 20,000 ft2 motel with no dining room or ballroom
is _____. - ANSWER-18,000VA
Demand lighting load = 2VA/ft2 x 20,000VA = 40,000VA
First 20,000 VA x 50% = 10,000VANext 20,000 VA x 40% = 8,000 VA Total
Load = 18,000VA
Refer to Figure 1. What is the total load of a feeder serving four 230V motors rated
5hp, 15hp, 20hp, and 40hp? - ANSWER-241.2A
125% of the largest motor's FLA from NEC Table 430.250:
40hp = 1.25 x 104A = 130A
Add this amperage to the other loads: 15.2A + 42A + 54A + 130A = 241.2A
When the overcurrent protection for a conductor is located on the load end rather
than the supply side of a conductor it is considered to be a(n) _____. - ANSWER-
tap conductor
An optional method for determining feeder to schools is covered in _____. -
ANSWER-NEC Section 220.86
What is the demand factor allowed by the NEC® for calculating the neutral
conductor size for an electric range load? - ANSWER-70%
What is the adjusted ampacity for each of six No. 4/0 THHN copper current-
carrying conductors in a single conduit? (Given: the ampacity of 4/0 THHN is
260A.) - ANSWER-208A
, 260A x 80% = 208A
Low-voltage equipment that is typically in contact with patients must be moisture-
resistant and operate on _____. - ANSWER-10V or less
Health care facilities are often supplied by two or more distribution points; this is
known as a(n) _____. - ANSWER-spot network
Individual branch circuits are not required for portable X-ray equipment requiring
no more than _____. - ANSWER-60A
The minimum ampacity for a feeder supplying ten 30A shore power receptacles in
a marina is _____. - ANSWER-120A
10 x 30A x 120V = 36,000VA
36,000VA x 0.8 = 28,800VA
28,000VA ÷ 240V = 120A
The smallest size locking and grounding type receptacle that may be used to
provide shore power for boats is _____ - ANSWER-30A
Refer to Figure 1. What is the total load a feeder serving four 2hp motors, three
5hp motors, one 15hp motor, and one 25hp motor? All motors are 208V. -
ANSWER-219.8A
Use of the 100' tap rule is limited to installation in high-bay manufacturing
buildings with wall heights over _____. - ANSWER-35 feet
AND FINAL EXAM 2026 WITH 170
QUESTIONS AND VERIFIED CORRECT
ANSWERS | ALREADY GRADED A+ |
ELECTRICAL NEC LEVEL 4 EXAM 2026
In most cases, feeder conductor size is adjusted when _____. - ANSWER-there are
more than three current-carrying conductors in the raceway
The rules governing the design of circuits supplying power to boats is covered in
_____. - ANSWER-NEC Article 555
When calculating the service requirement for a particular building, the first step is
to _____. - ANSWER-determine the floor area of the building
If a store lighting load is 14,000VA (continuous), which of the following must be
used for the circuit calculation? - ANSWER-17,500VA
1.25 x 14,000VA = 17,500VA
A commercial kitchen with more than six pieces of kitchen equipment is subject to
a demand factor of _____. - ANSWER-65%
,Which of the following lighting loads would be used in a residence that is 1,650
ft2? - ANSWER-4,950VA
1,650 x 3VA per square foot = 4,950VA
The demand lighting load for a 20,000 ft2 motel with no dining room or ballroom
is _____. - ANSWER-18,000VA
Demand lighting load = 2VA/ft2 x 20,000VA = 40,000VA
First 20,000 VA x 50% = 10,000VANext 20,000 VA x 40% = 8,000 VA Total
Load = 18,000VA
Refer to Figure 1. What is the total load of a feeder serving four 230V motors rated
5hp, 15hp, 20hp, and 40hp? - ANSWER-241.2A
125% of the largest motor's FLA from NEC Table 430.250:
40hp = 1.25 x 104A = 130A
Add this amperage to the other loads: 15.2A + 42A + 54A + 130A = 241.2A
When the overcurrent protection for a conductor is located on the load end rather
than the supply side of a conductor it is considered to be a(n) _____. - ANSWER-
tap conductor
An optional method for determining feeder to schools is covered in _____. -
ANSWER-NEC Section 220.86
What is the demand factor allowed by the NEC® for calculating the neutral
conductor size for an electric range load? - ANSWER-70%
What is the adjusted ampacity for each of six No. 4/0 THHN copper current-
carrying conductors in a single conduit? (Given: the ampacity of 4/0 THHN is
260A.) - ANSWER-208A
, 260A x 80% = 208A
Low-voltage equipment that is typically in contact with patients must be moisture-
resistant and operate on _____. - ANSWER-10V or less
Health care facilities are often supplied by two or more distribution points; this is
known as a(n) _____. - ANSWER-spot network
Individual branch circuits are not required for portable X-ray equipment requiring
no more than _____. - ANSWER-60A
The minimum ampacity for a feeder supplying ten 30A shore power receptacles in
a marina is _____. - ANSWER-120A
10 x 30A x 120V = 36,000VA
36,000VA x 0.8 = 28,800VA
28,000VA ÷ 240V = 120A
The smallest size locking and grounding type receptacle that may be used to
provide shore power for boats is _____ - ANSWER-30A
Refer to Figure 1. What is the total load a feeder serving four 2hp motors, three
5hp motors, one 15hp motor, and one 25hp motor? All motors are 208V. -
ANSWER-219.8A
Use of the 100' tap rule is limited to installation in high-bay manufacturing
buildings with wall heights over _____. - ANSWER-35 feet
