NEC Questions Practice Test-1
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Free Online Practice Test NEC code Questions
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Question 1 of 10
1. Question
How many maximum number of receptacles that can be located on a 15 ampere branch circuit operating at 120 volts?
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P = 120 * 15 = 1800
Number of receptacles = 1800 / 180 = 10 receptacles -
Question 2 of 10
2. Question
In a panel board a two-pole circuit breaker is considered to be ……………….
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Refer : NEC 408.54
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Question 3 of 10
3. Question
What is the minimum size service disconnecting means for a single family dwelling unit with an initial load of 10 KVA or more?
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Refer: NEC 230.79
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Question 4 of 10
4. Question
At which of the following percentage the demand factor for six house hold electric cloth dryers is calculated?
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Refer: NEC 220.54
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Question 5 of 10
5. Question
What is the unit load in volt ampere per square foot for stores?
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Refer : NEC table 220.12
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Question 6 of 10
6. Question
What is the maximum instantaneous voltage that a low voltage lighting system cannot exceed under any load conditions?
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Refer : NEC 411.2
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Question 7 of 10
7. Question
A 25 amperes branch circuit connected with a cord-and-plug-connected appliance. What is the maximum ampere rating permitted for the appliance?
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Refer : NEC 210.23(A)(1)
Cord and plug connected equipment shall not exceed 80 percent of branch circuit rating
25 * 0.8 = 20 amperes -
Question 8 of 10
8. Question
When two loads on branch circuit operate simultaneously the larger load can be omitted for branch circuit load calculations.
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Question 9 of 10
9. Question
As per NEC central heating equipment can be supplied by a multi-wire branch circuit?
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Question 10 of 10
10. Question
The circuit breakers enclosures must be mounted in horizontal position.
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