2021 Edition

Electrician Practice Test

Take a free Electrician Practice Test to see what kind of questions are on actual electrician license exams.  Most states require an electrician to pass an exam to receive a journeyman or master electrician license.   State exams cover such areas as Electrical Theory, Trade Knowledge, Grounding and Bonding, Wiring Methods and Installation, Overcurrent Protection, Load Calculations, etc. This practice test is broken into two sections (Journeyman and Master) and is based on the 2020 NEC.

To prepare for your actual Electrician Exam, these two practice exams by Ray Holder (Master Electrician and Certified Electrical Trade Instructor) have 300 questions with fully explained answers:

With Tests.com, you have the option to purchase a practice test kit based on the 2014, 2017 or 2020 NEC Codes. Check with your local code official to determine which code applies to your location.

Journeyman Electrician

1. Where insulated power and lighting conductors are installed in raceways, an ampacity adjustment must be applied where _____.

 I. there are more than three (3) current-current carrying conductors in the same raceway         
II. an ambient temperature other than 86°F is encountered
2. According to the Code, flexible metal conduit (FMC) enclosing circuit conductors is not approved for use as a type of an equipment grounding conductor in lengths exceeding _____.
3. Where a single 125-volt, single-phase, 20-ampere receptacle outlet located in an attached garage of a dwelling unit is provided for a central vacuum assembly, the receptacle outlet is required to have _____.
4. Where Type NM cable is used as the wiring method for "home runs" for power and lighting branch circuits in a dwelling, the minimum size copper required is _____.
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5. When single-phase, 125-volt, 15- or 20-ampere receptacles are housed in a device box located outdoors in a wet location, the receptacles shall have an enclosure that is listed as _____ whether or not the attachment plug cap is inserted.
6. For one-family dwellings supplied by a single-phase, 120/240-volt system, and having a 200-ampere rated inverse time circuit breaker for the main disconnecting means, what minimum size THWN aluminum conductors are permitted for use as ungrounded service-entrance conductors? Given: No adjustment or correction factors are required.
7. If a 1¾ in. deep, single-gang, Type FS device box houses a duplex receptacle, how many insulated size 12 AWG conductors are permitted to be enclosed in the FS box?
8. The required 15- or 20-ampere receptacle outlet for a peninsular countertop or work surface in the kitchen of a dwelling must be located not further than _____from the outer edge of the peninsular countertop.
9. In compliance with the rules established by the NEC®, all 120-volt, single-phase, 15- and 20-ampere branch circuits supplying outlet or devices in specific areas or rooms of a dwelling unit shall be provided with arc-fault circuit-interrupter protection. Where Type NM cable is used as the wiring method for "home runs" in the dwelling, the maximum length of the cable from the overcurrent device to the first outlet shall not exceed _____ for size 14 AWG NM cable and _____ for size 12 AWG NM cable.
10. The Code mandates a clearly labeled emergency disconnect is to be provided at each service for one- and two-family dwelling units. The emergency disconnect is permitted to be installed _____.

Master Electrician

11. In compliance with the Code, liquidtight flexible metal conduit (LFMC) enclosing power and lighting circuit conductors is not considered an effective ground-fault current path where the length of the LFMC exceeds _____.
12. For a 3-phase, continuous duty, induction-type motor, Table 430.250 is not used to determine the _____ for the motor.
13. As specified in the Code, where are you required to make the connection between the equipment grounding conductor and the grounded neutral conductor at a 208Y/120-volt, 3-phase, 4-wire service?
14. Given: A hot tub is to located in the common area of a multifamily dwelling unit; a clearly labeled emergency shutoff or control switch for the purpose of stopping the motor(s) of the water recirculation and jet system is required to be installed for the users at a readily accessible location and NOT more than _____ from the hot tub.
15. The disconnecting means for air-conditioning or refrigeration equipment shall NOT be located _____.
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16. The required support distance for exposed vertical rigid metal conduit (RMC) risers from industrial machinery or fixed equipment, where the RMC is made up with threaded couplings, the conduit is supported and securely fastened at the top and bottom of the riser, and no other means of intermediate is readily available is ___.
17. When installing an emergency back-up generator with an output of 22 kW, single-phase, 120/240-volts for a farm house, the ampacity of phase conductors from the generator terminals to the first overcurrent protective device shall not be less than ____ of the nameplate current rating of the generator where the design of the generator does not prevent overloading.
18. For freestanding type, cord-and plug connected office furnishings, which of the following is NOT permitted?
19. According to the Code, flexible metal conduit (FMC) enclosing circuit conductors is not approved for use as a type of an equipment grounding conductor in trade sizes larger than _____.
20. What is the MINIMUM size wire-type copper equipment grounding conductor required for a 20-ampere rated branch circuit installed in PVC conduit that supplies a swimming pool pump motor?

Master Electrician Practice Exam

Construction Trades Practice Tests

Electrician Practice

Master Electrician Practice Exam

Quality starts with who wrote the material.
Our practice exam writer
Ray Holder
Certified Electrical Trade Instructor & Electrician License Exam Expert

Ray Holder Journeyman Electrician Practice Exam

Ray has worked in the electrical industry for over 45 years as an apprentice, journeyman, master, field engineer, estimator, business manager, contractor, inspector, consultant and instructor.

He holds a Bachelor of Science degree in Occupational Education and a lifetime Vocational Education teaching certificate from the Texas Education Agency.

Ray is a certified instructor of electrical trades. His classes are presented in a simplified, easy-to-understand format for electricians. Ray is currently the Director of Education for Electrical Seminars, Inc.

He is an active member of the International Association of Electrical Inspectors and a retired member of the International Brotherhood of Electrical Workers