Free Electrician Exam Practice Test 2020 NEC

Take this 25-question free Electrician exam, & see where you stand! These electrician exam practice questions are similar to the 2020 NEC test questions found on the actual electrician exam. Each test is a random selection from thousands of potential questions, so memorizing answers is not the path to passing your exam!

The electrician exam is a code reference exam. You are tested on your 2020 NEC code knowledge and ability to locate test answers quickly.

Remember: The answer is irrelevant. The process of locating the answer in the codebook will ensure you pass your exam.  If you understand how to find answers in your codebook, you should be able to get 100% of these questions correct.

We teach you how to navigate your codebook – master the code, master the exam!

Use the 2020 (NEC) National Electrical Code) to solve these electrical certification exam practice questions.

Welcome to your free 2020 NEC Quiz

1. 
What is the minimum size copper equipment grounding conductor (EGC) required for a circuit protected by a 20-ampere circuit breaker?

2. 
Which of the following is a standard ampere rating for an inverse time circuit breaker?

3. 
The minimum clear width of the working space in front of electrical equipment must be the width of the equipment or a minimum of:

4. 
When connecting a grounding electrode conductor (GEC) to a concrete-encased electrode (Ufer ground), the GEC is not required to be larger than what size copper wire?

5. 
What is the minimum burial depth required for a direct-buried residential Type UF cable (rated 120V) that is not protected by a GFCI?

6. 
What is the required free space volume allowance for a single 14 AWG conductor in a junction box?

7. 
For a dwelling unit, what is the minimum required clearance for overhead service-drop conductors (not exceeding 1,000 volts) passing above a residential driveway?

8. 
What is the minimum size copper conductor permitted for general wiring up to 2000 volts?

9. 
In a dwelling unit bathroom, at least one receptacle outlet must be installed within how far of the outside edge of each sink basin?

10. 
Branch circuit conductors supplying a single continuous-duty motor must have an ampacity of not less than what percentage of the motor’s full-load current rating?

11. 
At a permanently installed swimming pool, at least one 125-volt, 15- or 20-ampere receptacle must be located not less than how far from the inside wall of the pool?

12. 
In a dwelling unit bedroom, receptacles must be installed so that no point measured horizontally along the floor line in any wall space is more than how far from a receptacle outlet?

13. 
Nonmetallic-sheathed cable (Type NM) must be secured in place at intervals not exceeding:

14. 
When calculating the general lighting load for a dwelling unit, what is the required unit load per square foot?

15. 
What is the minimum required overhead clearance for service-drop conductors passing over a public street, alley, or parking area subject to truck traffic?

16. 
What is the ampacity of a 10 AWG THHN copper conductor before any derating factors are applied? (Assume a 90°C rating)

17. 
When replacing an existing non-grounding type (two-prong) receptacle where no equipment grounding conductor exists in the box, which of the following is permitted?

18. 
What is the minimum required length for a driven ground rod?

19. 
When exactly two conductors are installed in a conduit, what is the maximum allowable percentage of conduit fill?

20. 
When installing a surface-mounted, completely enclosed incandescent luminaire in a clothes closet, what is the minimum clearance required between the luminaire and the nearest point of the storage space?

Prove you are human