NEC Code Practice Tests

National Electrical Code practice questions — articles, tables, and code requirements.

43tests·401questions·Free · No signup·NEC 2023

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Wiring MethodsBranch CircuitsMotors

Grouding and Bonding (NEC 250)

Intermediate

Free online test on Grounding and bonding ( National Electrical Code - 250)

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Wiring MethodsBranch CircuitsMotors

Branch Circuits (NEC 210)

Intermediate

Free online practice test on NEC code Questions (Branch Circuits)

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Overcurrent Protection Practice Test-1

Intermediate

Free Online Practice Test o Over current Protection (NEC Questions)

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Service Entrance , Branch circuits and feeder conductors-2

Intermediate

Service Entrance , Branch circuit conductors and Feeder conductor theory and practice test -2

11Q17 min70%pass

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Wiring MethodsBranch CircuitsMotors

Dwelling Unit Calculations Practice Quiz - 1

Intermediate

Free Online Practice Test on Single Family Dwelling Unit calculations - 1

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Wiring MethodsBranch CircuitsMotors

Motor circuit calculations (NEC 400)

Intermediate

Free online nec code practice test ( Motor Circuit Calculations )

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Wiring MethodsBranch CircuitsMotors

NEC 500 hazardous locations

Intermediate

Free online theory quiz test on hazardous locations (NEC 500)

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Wiring MethodsBranch CircuitsMotors

Flexible Cords and Fixture wires ( NEC 400)

Intermediate

Free online practice test on Flexible cords and Fixture Wires (NEC CODE 450) Objective Questions.

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Wiring MethodsBranch CircuitsMotors

Wiring Methods (NEC 300) Practice Test

Intermediate

Free Online Practice Test on NEC(300) Wiring Methods

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Wiring MethodsBranch CircuitsMotors

Cabinet-enclosuse-cutout boxes

Intermediate

Free practice NEC Code question and answers on Cabinets, enclosures, cutlet boxes.

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Wiring MethodsBranch CircuitsMotors

NEC (310) Conductors General Wiring

Intermediate

Free online practice NEC Code Questions on NEC (310) Conductors General Wiring

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Wiring MethodsBranch CircuitsMotors

NEC Code Questions Practice Test-1

Intermediate

Free Online Practice Test NEC code Questions

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NEC Code Questions Practice Test-2

Intermediate

Free Online Practice on NEC code Questions - 2

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Wiring MethodsBranch CircuitsMotors

NEC Code Questions Practice Test-3

Intermediate

Free Online Practice Test on NEC Code Objective Questions

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Wiring MethodsBranch CircuitsMotors

NEC Code Questions Practice Test-4

Intermediate

Free NEC code Questions Practice test-4

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Wiring MethodsBranch CircuitsMotors

NEC Code Questions Practice Test-5

Intermediate

Free Online Practice Test on NEC Code Questions-5

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NEC Code Questions Practice Test-6

Intermediate

Free NEC code Questions Practice Test-6

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Wiring MethodsBranch CircuitsMotors

NEC Code Questions Practice Test-7

Intermediate

Free online Practice Test on NEC Code questions - 7

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NEC Code Questions Practice Test-8

Intermediate

Free NEC Code Questions Practice Quiz-8

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NEC Code Questions Practice Test-9

Intermediate

Free Online Practice Quiz NEC Code Questions-9

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Wiring MethodsBranch CircuitsMotors

NEC Code Questions Practice Test-10

Intermediate

Free online Practice Test on NEC Code Questions-10

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Wiring MethodsBranch CircuitsMotors

Motor Circuit Calculations-2 (NEC 430)

Intermediate

Free Online NEC Code Questions : Motor Circuit Calculations (NEC 430)

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Wiring MethodsBranch CircuitsMotors

Equipment for General Use Questions-1

Intermediate

Free NEC 400: Equipment For General Use Practice Questions-1

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Wiring MethodsBranch CircuitsMotors

Commercial load Calculations (NEC Code Questions)

Intermediate

Free NEC Code Questions and Answers ( Commercial Load Calculations)

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Voltage Drop Calculations (NEC Code Questions)

Intermediate

Free online practice test on Conductor Voltage Drop calculations.

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Wiring MethodsBranch CircuitsMotors

commercial load calculations-2

Intermediate

Free Practice test on NEC code questions:: commercial load calculations - 2

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Wiring MethodsBranch CircuitsMotors

Motor Circuit Calculations -3 (NEC Code Questions)

Intermediate

Online Practice Test on Motor Circuit Calculations

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Wiring MethodsBranch CircuitsMotors

Panel and Switch Board- NEC Code Questions

Intermediate

Practice Questions on Panel and Switch Boards - NEC Code Questions

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Wiring MethodsBranch CircuitsMotors

Single family dwelling unit Practice Questions

Intermediate

NEC Code Questions : Single family dwelling unit calculations

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Wiring MethodsBranch CircuitsMotors

Branch circuit Practice Questions

Intermediate

Take a Practice test on Branch Circuit Practice quiz questions - 1

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Service conductor practice test questions-1

Intermediate

Take a Practice test on Service conductor Practice quiz questions - 1

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Over current Protection Practice Test Questions-2

Intermediate

Take a Practice test on Over current Protection quiz questions - 2

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NEC Code Questions Practice Test-11

Intermediate

Take a Practice test on NEC Code Practice quiz questions - 11

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Wiring MethodsBranch CircuitsMotors

NEC Code Questions Practice Test-12

Intermediate

Take a Practice test on NEC Code Practice quiz questions - 12

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Wiring MethodsBranch CircuitsMotors

NEC Code Questions Practice Test-13

Intermediate

Take a Practice test on NEC Code Practice quiz questions - 13

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Wiring MethodsBranch CircuitsMotors

NEC Code Questions Practice Test-14

Intermediate

Take a Practice test on NEC Code Practice quiz questions - 14

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Wiring MethodsBranch CircuitsMotors

NEC Code Questions Practice Test-16

Intermediate

Take a Practice test on NEC Code Practice quiz questions - 16

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Wiring MethodsBranch CircuitsMotors

NEC Code Questions Practice Test-17

Intermediate

Take a Practice test on NEC Code Practice quiz questions - 17

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Wiring MethodsBranch CircuitsMotors

NEC Code Questions Practice Test-18

Intermediate

Take a Practice test on NEC Code Practice quiz questions - 18

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Wiring MethodsBranch CircuitsMotors

NEC Code Questions Practice Test-19

Intermediate

Take a Practice test on NEC Code Practice quiz questions - 19

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Wiring MethodsBranch CircuitsMotors

NEC Code Questions Practice Test-20

Intermediate

Take a Practice test on NEC Code Practice quiz questions - 20

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Hazardous Locations practice test questions-1

Intermediate

Take a Practice test on Hazardous locations Practice quiz questions - 1

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Wiring MethodsBranch CircuitsMotors

NEC Code Questions Practice Test-15

Intermediate

Take a Practice test on NEC Code Practice quiz questions - 15

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Study Guides

Written guides for the topics covered in these tests — read first, then test yourself.

NEC 250 — Grounding & Bonding

Equipment grounding conductor sizing per Table 250.122.

NEC 310 — Conductors

Ampacity tables, temperature corrections, and adjustment factors.

NEC 408/409 — Switchboards

Series ratings, working space, and dedicated equipment space.

About NEC Practice Tests

The National Electrical Code (NEC) is the foundation of electrical safety standards. Our practice tests help you master:

NEC articles and code structure
Code tables and interpretations
Grounding and bonding requirements
Wiring methods and protection
Special occupancies and equipment

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Last updated April 2026 · NEC 2023 Edition