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Electrician Licensing Exam Questions and Answers Study Guide 2026, Exams of Electrical Engineering

Western Governors University (WGU)Electrical Engineering

This study guide is designed to help candidates prepare effectively for the Electrician Licensing Exam. It includes a structured set of exam-style questions with accurate, verified answers covering essential electrical theory, safety standards, and installation practices. The material focuses on key topics such as electrical circuits, wiring systems, code compliance, troubleshooting, grounding, load calculations, and workplace safety regulations. Each question is designed to reinforce understanding and improve practical application of electrical concepts in exam scenarios. Ideal for revision and self-assessment, this guide helps learners identify weak areas, strengthen technical knowledge, and build confidence before the licensing exam. It is a valuable resource for mastering electrician fundamentals and improving exam performance.

Typology: Exams

2025/2026

Available from 04/30/2026

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Electrician's Licensing Exam
Electrician's Licensing Exam
NEC Article ______ efines breakers an fuses. Accor ing to NEC Article 100, a evice that opens an closes a circuit by๐‘‘ ๐‘‘ ๐‘‘ ๐‘‘ ๐‘‘
nonautomatic means automatically closes for a pre etermine overcurrent.๐‘‘ ๐‘‘
Annex _____ of NEC covers con uit fill. Annex C of NEC covers con uit an tubing fill for con uctors an fixture wire๐‘‘ ๐‘‘ ๐‘‘ ๐‘‘ ๐‘‘
fill.
NEMA stan s for National Electrical Manufacturers True - NEMA is the acronym for National Electrical Manufacturers ๐‘‘
Association.
Association
What oes it mean when a receptacle has "NEMA 5-A receptacle with NEMA 5-20R on it has an amperes rating of 20, will take a๐‘‘
20R" on it? NEMA-5-15P or NEMA-5-20P plug, an has a voltage rating of 125.๐‘‘
NEC Tables 310-10 through 310-21 provi e information The sizes of copper an aluminum wire, as well as the coating of wire ๐‘‘ ๐‘‘
that has
on. fewer than three current carrying wires in a cable or con uit or that is burie in๐‘‘ ๐‘‘
the earth.
Which NEC tables(s) cover(s) the fill of metal boxes? The fill of metal boxes appears in NEC Tables 314.6 A an B.๐‘‘
NEC Article _____ a ress EMT. NEC Article 358 covers EMT.๐‘‘๐‘‘
Which NEC articles cover the installation requirements NEC Articles 342, 344, an 358 outline the installation requirements of ๐‘‘
RMC,
for RMC, IMC, an EMT? IMC, an EMT.๐‘‘ ๐‘‘
IN NEC 2008, what oes Table 370.6A cover? Shows in two columns (milimeters an inches), how many wires in tra e size๐‘‘ ๐‘‘ ๐‘‘
you can place in a box.
What NEC table woul you go to to fin tra e size of Chapter 9, Table 4 outlines tra e size of con uit as well as raceway size.๐‘‘ ๐‘‘ ๐‘‘ ๐‘‘ ๐‘‘
con uit an raceway size?๐‘‘ ๐‘‘
NEC Articles _____ an _____ covers metallic an non-NEC Article 386 covers metallic or metal raceway; NEC Article 388 covers ๐‘‘ ๐‘‘
PVC
metallic raceways in buil ings. pipe.๐‘‘
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Electrician's Licensing Exam

NEC Article ______ ๐‘‘efines breakers an ๐‘‘ fuses. Accor ๐‘‘ing to NEC Article 100, a ๐‘‘evice that opens an ๐‘‘closes a circuit by nonautomatic means automatically closes for a pre ๐‘‘etermine ๐‘‘overcurrent. Annex _____ of NEC covers con ๐‘‘uit fill. Annex C of NEC covers con ๐‘‘uit an ๐‘‘ tubing fill for con ๐‘‘uctors an ๐‘‘fixture wire fill. NEMA stan ๐‘‘s for National Electrical Manufacturers True - NEMA is the acronym for National Electrical Manufacturers Association. Association What ๐‘‘oes it mean when a receptacle has "NEMA 5-A receptacle with NEMA 5-20R on it has an amperes rating of 20, will take a 20R" on it? NEMA-5-15P or NEMA-5-20P plug, an ๐‘‘has a voltage rating of 125. NEC Tables 310-10 through 310-21 provi ๐‘‘e information The sizes of copper an ๐‘‘aluminum wire, as well as the coating of wire that has on. fewer than three current carrying wires in a cable or con ๐‘‘uit or that is burie ๐‘‘in the earth. Which NEC tables(s) cover(s) the fill of metal boxes? The fill of metal boxes appears in NEC Tables 314.6 A an ๐‘‘B. NEC Article _____ a ๐‘‘๐‘‘ress EMT. NEC Article 358 covers EMT. Which NEC articles cover the installation requirements NEC Articles 342, 344, an ๐‘‘358 outline the installation requirements of RMC, for RMC, IMC, an ๐‘‘ EMT? IMC, an ๐‘‘EMT. IN NEC 2008, what ๐‘‘oes Table 370.6A cover? Shows in two columns (milimeters an ๐‘‘ inches), how many wires in tra ๐‘‘e size you can place in a box. What NEC table woul ๐‘‘ you go to to fin ๐‘‘ tra ๐‘‘e size of Chapter 9, Table 4 outlines tra ๐‘‘e size of con ๐‘‘uit as well as raceway size. con ๐‘‘uit an ๐‘‘raceway size? NEC Articles _____ an ๐‘‘ _____ covers metallic an ๐‘‘non-NEC Article 386 covers metallic or metal raceway; NEC Article 388 covers PVC metallic raceways in buil ๐‘‘ings. pipe.

The Panel Boar ๐‘‘ requirements for Application in NEC Article 408 covers panel boar ๐‘‘applications. Construction appear in NEC Article? The smaller kitchen counter requiring a receptacle is A 12in. counter requires a receptacle because it hol ๐‘‘s small appliances. _____ inches. What new co ๐‘‘e is nee ๐‘‘e ๐‘‘ for protection in all Accor ๐‘‘ing to new co ๐‘‘es, ARC fault protection is nee ๐‘‘e ๐‘‘ many a ๐‘‘๐‘‘itional parts habitable spaces? of the house. A 12-foot hallway requires one receptacle to meet True, One is require ๐‘‘, Two are suggeste ๐‘‘. co ๐‘‘e. (True or False) NEC Article 100 is ๐‘‘e ๐‘‘icate ๐‘‘to? Definitions The main groun ๐‘‘ on a service is a(n) _____. Groun ๐‘‘ Ro๐‘‘ What ๐‘‘oes NEC Section 250-28A require? A main bon ๐‘‘ing jumper an ๐‘‘ a system bon ๐‘‘ing jumper. NEC section 250-28A provi ๐‘‘es information on what True material can be use ๐‘‘ for a main bon ๐‘‘ing jumper. (True or False) A bon ๐‘‘ing screw is what color? A bon ๐‘‘ing screw is green. A subpanel requires a bon ๐‘‘ing screw? (True or False) False, A bon ๐‘‘ing screw is unnee ๐‘‘e ๐‘‘in a subpanel. Name the metho ๐‘‘s of sizing bon ๐‘‘ing jumpers outline ๐‘‘ 1. Bon ๐‘‘ing jumper is size ๐‘‘not less than 12.5% of the largest phase con ๐‘‘uctor. in NEC Section 250-28D.

  1. Base ๐‘‘ on the largest ungroun ๐‘‘e ๐‘‘ service con ๐‘‘uctor.
  2. Base ๐‘‘ on the largest sum of the service con ๐‘‘uctors. NEC Table _____ covers groun ๐‘‘ing electro ๐‘‘e con ๐‘‘uctor NEC Table 250. sizing. Which NEC reference i ๐‘‘entifies wire sizing an ๐‘‘ the NEC Tables Annex C1 an ๐‘‘ C2 i ๐‘‘entify both wire sizing an ๐‘‘the temperature a temperature a wire can han ๐‘‘le in amps? wire can han ๐‘‘le in amps. Define a groun ๐‘‘ing system accor ๐‘‘ing to NEC. A goun ๐‘‘ing system is connecte ๐‘‘ to the groun ๐‘‘ or to a con ๐‘‘uctive bo ๐‘‘y that exten ๐‘‘s the groun ๐‘‘connection. What is the topic of NEC Section 250-122? Is ๐‘‘e ๐‘‘icate ๐‘‘ to the sizes of the groun ๐‘‘ing con ๐‘‘uctor What is the NEC ๐‘‘efinition of a circuit breaker? A ๐‘‘evice ๐‘‘esigne ๐‘‘ to trip when an overcurrent is ๐‘‘etecte ๐‘‘. NEC Section 300-13 provi ๐‘‘es information on? Mechanical an ๐‘‘ Electrical continuity con ๐‘‘uctors. What is the subject of NEC Section 250-2D? Bon ๐‘‘ing jumpers ______ are the subject of NEC Section 680-20. Electrical installations at permanently installe ๐‘‘pools. Which NEC Section covers equipment groun ๐‘‘ing NEC Section 250- con ๐‘‘uctors.

What is the service ๐‘‘rop ๐‘‘istance, in feet, of a 200-amp 12ft. service crossing resi ๐‘‘ential property? The require ๐‘‘ clearance for a 400-amp service ๐‘‘rop 18ft. across a major roa ๐‘‘way is? Describe the information covere ๐‘‘ in NEC Article 230.9 Covers clearances on buil ๐‘‘ings. (A) Accor ๐‘‘ing to NEC 230.9(A), an unsheathe ๐‘‘service 3ft. con ๐‘‘uctor must be _____ft. from a win ๐‘‘ow that opens. Which NEC Article covers groun ๐‘‘ing? NEC Article 250 System an ๐‘‘ circuit groun ๐‘‘ing involves taking alternating True current to groun ๐‘‘? (True or False) The process of equipment _____ exposes current-Groun ๐‘‘ing carrying parts to a groun ๐‘‘ing system. Small power tools are protecte ๐‘‘ in what two ways? 1.Insulate ๐‘‘Housings.

  1. Groun ๐‘‘prong on plugs. When bon ๐‘‘ing a plumbing system to the electrical False, run groun ๐‘‘wire from panel to copper water pipe then jump the water system, it is not necessary to jump the water meter as meter using groun ๐‘‘ing clamps. this connection is built into the meter. (True or False) Explain the proper way to groun ๐‘‘ a subpanel in the To groun ๐‘‘ a subpanel in the same buil ๐‘‘ing, run a four-wire system from main same buil ๐‘‘ing. panel to subpanel. Discuss the proper way to groun ๐‘‘ a subpanel in To groun ๐‘‘ a subpanel in the another buil ๐‘‘ing, run bare copper wire from another buil ๐‘‘ing. subpanel to groun ๐‘‘ ro ๐‘‘ insi ๐‘‘e or outsi ๐‘‘e. Something that is ______ is connecte ๐‘‘ to groun ๐‘‘or to a Groun ๐‘‘e ๐‘‘ con ๐‘‘uctive bo ๐‘‘y that exten ๐‘‘s the groun ๐‘‘ing connection. Describe a groun ๐‘‘ing con ๐‘‘uctor. A groun ๐‘‘e ๐‘‘ con ๐‘‘uctor is a system or circuit that is intentionally groun ๐‘‘e ๐‘‘. Define the term groun ๐‘‘ing con ๐‘‘uctor. A groun ๐‘‘ing con ๐‘‘uctor is a con ๐‘‘uctor or circuit of a wiring system to a groun ๐‘‘ing electro ๐‘‘e (groun ๐‘‘ ro ๐‘‘). A(n) _____ is the fun ๐‘‘amental particle of electricity. Electron Voltage can be fatal to a person. (True or False) False, Current is fatal to people not Voltage What ๐‘‘etermines the severity of an electrical shock? Voltage level, amount of protective clothing, an ๐‘‘moisture on skin or outerwear all impact a groun ๐‘‘connection. Groun ๐‘‘ing re ๐‘‘uces the voltage that might cause a fatal True electrical shock by allowing excess current to flow to the groun ๐‘‘. (True or False)

_____ an ๐‘‘ ______ are two types of electrical faults. Groun ๐‘‘ an ๐‘‘Arc are two types of electrical faults. On a 400-amp services, how many groun ๐‘‘ ro ๐‘‘s are 2 groun ๐‘‘ ro ๐‘‘s 6 ft apart. require ๐‘‘? The stan ๐‘‘ar ๐‘‘ length for IMC is? Two outsi ๐‘‘e groun ๐‘‘ wire are nee ๐‘‘e ๐‘‘on a 400 amp. NEC allows electricians to groun ๐‘‘ gas pipes to existing, True, when those water pipes are groun ๐‘‘e ๐‘‘. groun ๐‘‘e ๐‘‘water pipes. (True or False) When is buil ๐‘‘ing steel permitte ๐‘‘ in an electro When only the steel is connecte ๐‘‘ to earth groun ๐‘‘. groun ๐‘‘ing system? _____ ๐‘‘etermines what size groun ๐‘‘ wire use ๐‘‘ on a The size of the largest con ๐‘‘uctor ๐‘‘etermines what size groun ๐‘‘ wire use ๐‘‘on a service. service. A groun ๐‘‘ing con ๐‘‘uctor is what color? A groun ๐‘‘ing con ๐‘‘uctor is green. What is meant by the term isolate ๐‘‘ groun ๐‘‘e ๐‘‘ An isolate ๐‘‘ groun ๐‘‘e ๐‘‘ reciprocal is a separate groun ๐‘‘ from a ๐‘‘evice ๐‘‘irectly to reciprocal? a panel. Explain the process of ca ๐‘‘ wel ๐‘‘ing? Exothermic wel ๐‘‘ing involves the fusion of metal materials or copper to rebar. Electricians may use rebar as a groun ๐‘‘ing means. (True True, Electricians may use rebar as a groun ๐‘‘ing means. or False) Electricians must use a(n) _____ to properly connect A Direct burial clamp is nee ๐‘‘e ๐‘‘to properly connect number 4 copper to a number 4 copper to a groun ๐‘‘ ro ๐‘‘. groun ๐‘‘ ro ๐‘‘. Using NEC Section 250-8, i ๐‘‘entify five metho ๐‘‘s of 1. Liste ๐‘‘Pressures Connectors making connections. 2. Terminal Bars

  1. Pressure Connectors Liste ๐‘‘ As Groun ๐‘‘ an ๐‘‘ Bon ๐‘‘ing Equipment 4. Exothermic Wel ๐‘‘ing
  2. Machine screw-type fasteners that engage not less than two threa ๐‘‘s or are screwe ๐‘‘with nuts Un ๐‘‘ergroun ๐‘‘ service is simpler to troubleshoot an ๐‘‘ Relative to un ๐‘‘ergroun ๐‘‘ service, overhea ๐‘‘electrical service is simpler to repair than overhea ๐‘‘ service? (True or False) troubleshoot an ๐‘‘ repair an ๐‘‘is the easier option when running electricity across roa ๐‘‘ways, waterways, an ๐‘‘right-of-ways. In NEC, Table _____ provi ๐‘‘es the sizing of groun ๐‘‘ing NEC 250.66 provi ๐‘‘es the sizing of groun ๐‘‘ing electro ๐‘‘e con ๐‘‘uctors electro ๐‘‘e con ๐‘‘uctors. Describe the process for bon ๐‘‘ing three 200-amp To make a proper groun ๐‘‘ing system using three 200-amp ๐‘‘isconnects, use a ๐‘‘ isconnects to make a proper groun ๐‘‘ing system. groun ๐‘‘wire of sufficient size to go from panel to panel with a lug, screw, or groun ๐‘‘ bar, if provi ๐‘‘e ๐‘‘. In terms of AWG, what is the minimum groun ๐‘‘ing The smallest groun ๐‘‘ing con ๐‘‘uctor permitte ๐‘‘is 6 awg or larger. con ๐‘‘uctor size permitte ๐‘‘? The way to groun ๐‘‘ a transformer in a commercial False, The way to groun ๐‘‘ a transformer in a commercial buil ๐‘‘ing is to place a buil ๐‘‘ing is to place a groun ๐‘‘ing ro ๐‘‘ insi ๐‘‘e the buil ๐‘‘ing? groun ๐‘‘ing ro ๐‘‘ outsi ๐‘‘e or beneath the buil ๐‘‘ing. (True or False)