Free practice test · 2023 NEC

Free journeyman electrician practice test

Take a free 30-question journeyman electrician practice test here, with no account: code questions and calculations on the 2023 NEC, scored when you finish, with your result by subject and every answer explained with the section to look up.

How this test works

Part	Questions	Time at the exam's pace
Code and calculation questions	30	72 minutes

Questions are spread over every subject area of the Oklahoma Journeyman Electrician outline in proportion to the number of questions each area has on the exam. The time is the exam's own minutes per question applied to this test, and the real exam passes at 70 percent. Keep your 2023 NEC open, as you will on the exam.

This version is on the 2023 NEC. If your state tests the 2026 NEC, take the 2026 NEC version. See which edition your state tests.

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The test

Question 1An electrician cuts 6 pieces of conduit, each 2 ft 8 in long. What is the total length of the pieces, in feet? A. 16.8 ft B. 12.48 ft C. 12 ft D. 16 ft

Question 2A sizing step calls for 125 percent of a 32 A load. What is the result? A. 4,000 A B. 40 A C. 8 A D. 25.6 A

Question 3A connected load of 18,000 VA has a demand factor of 35 percent applied to it. What is the demand load? A. 11,700 VA B. 630,000 VA C. 630 VA D. 6,300 VA

Question 4A single non-motor appliance rated 12 A, with no overcurrent device rating marked, is on its own branch circuit. What is the largest overcurrent device 422.11(E) permits? A. 15 A B. 18 A C. 20 A D. 10 A

Question 5A single non-motor appliance rated 28 A is marked "maximum overcurrent device 30 A". What is the largest overcurrent device permitted? A. 30 A B. 40 A C. 35 A D. 20 A

Question 6A single non-motor appliance rated 18 A has no marked overcurrent device rating. Use the 422.11(E)(3) allowance for the next higher standard rating where 150 percent is not a standard size. What is the largest device permitted? A. 25 A B. 20 A C. 35 A D. 30 A

Question 7A rooftop unit's compressor is marked RLA 62 A and BCSC 70 A. Copper THWN conductors, 75°C terminals. What is the minimum branch-circuit conductor size? A. 4 AWG B. 2 AWG C. 3 AWG D. 2/0 AWG

Question 8A hermetic motor-compressor has a rated-load current of 18 A and no branch-circuit selection current marked. Applying 440.22(A) with no exceptions, what is the largest standard short-circuit and ground-fault protective device permitted? A. 30 A B. 35 A C. 25 A D. 40 A

Question 9A motor-compressor nameplate shows RLA 22 A and BCSC 25 A. Applying 440.22(A) with no exceptions, what is the largest standard short-circuit and ground-fault protective device permitted? A. 45 A B. 35 A C. 40 A D. 30 A

Question 10A 60-A branch-circuit breaker, not listed for 100 percent operation, supplies only continuous load. What is the largest continuous load it may supply? A. 60 A B. 48 A C. 75 A D. 45 A

Question 11A 20-ft feeder tap in raceway is taken from a feeder protected at 400 A and ends in a single breaker (240.21(B)(2)). Copper THWN, 75°C terminals. What is the minimum tap conductor size? A. 8 AWG B. 600 kcmil C. 2/0 AWG D. 1/0 AWG

Question 12A field-installed tap 6 ft long leaves the enclosure where it is made and runs in raceway to a panelboard (240.21(B)(1)). The feeder is protected at 200 A; the tap ends in a 30-A breaker; the calculated load is 24 A. What minimum ampacity must the tap conductors have? A. 20 A B. 30 A C. 24 A D. 66.7 A

Question 13An 800-A feeder is run as two parallel sets, each set in its own metal conduit, with a wire-type copper EGC in each conduit. What is the minimum size of the EGC in each conduit? A. 1/0 AWG B. 3 AWG C. 3/0 AWG aluminum D. 2/0 AWG

Question 14A motor branch circuit is protected by a 70-A inverse time breaker sized under 430.52. The motor full-load current from Table 430.250 is 27 A. What is the minimum size of the copper EGC? A. 10 AWG B. 6 AWG aluminum C. 8 AWG D. 6 AWG

Question 15A 30-hp, 460-V, 3-phase squirrel-cage motor (not Design B energy-efficient) is protected by an instantaneous-trip breaker set at 320 A. Table FLC is 40 A. Under 250.122(D)(2), what is the minimum size of the copper EGC? A. 3 AWG B. 10 AWG C. 6 AWG aluminum D. 8 AWG

Question 168 AWG THWN copper conductors are installed in a cold storage area where the ambient is 18°C. What is their corrected ampacity? Round to 0.1 A. A. 55.5 A B. 50.0 A C. 45.0 A D. 54.0 A

Question 17A 70 A load is supplied with THWN copper conductors and 75°C terminations through a boiler room with a 45°C ambient. What is the smallest conductor whose corrected ampacity is at least 70 A? A. 6 AWG B. 4 AWG C. 1 AWG D. 3 AWG

Question 18What is the 90°C ampacity in Table 310.16 of 250 kcmil THHN copper? A. 255 A B. 290 A C. 215 A D. 230 A

Question 19A 2-gang box with no internal clamps holds two receptacles, each on its own yoke. Eight 12 AWG insulated conductors and seven 12 AWG equipment grounding conductors enter the box. What is the required volume? A. 30.94 in.³ B. 29.25 in.³ C. 42.75 in.³ D. 26.44 in.³

Question 20Six 14 AWG conductors enter a box and are spliced together. What volume do the conductors require (conductors only)? A. 13.50 in.³ B. 10.50 in.³ C. 6.00 in.³ D. 12.00 in.³

Question 21A junction box has four 12 AWG conductors and two 14 AWG conductors entering it, all spliced inside. There are no clamps, devices or grounds. What is the total conductor volume? A. 13.50 in.³ B. 13.00 in.³ C. 12.00 in.³ D. 9.00 in.³

Question 22A mobile home measures 64 × 14 ft (outside) and has two small-appliance circuits and a laundry circuit. What is the lighting, small-appliance and laundry load in amperes per leg under 550.18(A)? Round only the final answer, to 0.1 A. A. 30.0 A B. 9.3 A C. 17.3 A D. 18.6 A

Question 23A 60 × 12 ft (outside) mobile home has three 20-A small-appliance circuits and a laundry circuit. What is the net volt-ampere value of 550.18(A)(5) before it is divided by 240 V? A. 8,160 VA B. 4,806 VA C. 4,281 VA D. 2,856 VA

Question 24A mobile home measures 72 × 14 ft outside and 70 × 13 ft inside. It has two small-appliance circuits and a laundry circuit. What is the 550.18(A) lighting, small-appliance and laundry load per leg? Round only the final answer, to 0.1 A. A. 19.1 A B. 18.7 A C. 31.4 A D. 16.9 A

Question 25An EVSE is rated 10 kW at 240 V, single-phase. What is the minimum standard overcurrent device rating for its branch circuit? A. 60 A B. 45 A C. 70 A D. 110 A

Question 26A sign branch circuit supplies an LED sign (no neon tubing). What branch-circuit rating meets both the minimum of 600.5(A) and the maximum of 600.5(C)? A. 15 A or 20 A B. 20 A or 30 A C. Any rating of 20 A or more D. 20 A only

Question 27A single-tenant store accessible to pedestrians has two customer entrances and one rear entrance used only for deliveries. Apply 600.5(A) Exception No. 1. How many sign outlets are required? A. 2 B. 3 C. 1 D. 0

Question 28Four arc welders on one feeder have individual 630.11(A) currents of 50, 40, 30, 20 A. What is the minimum feeder ampacity? A. 140.0 A B. 117.0 A C. 84.0 A D. 129.5 A

Question 29A 230-V, 3-phase hermetic motor-compressor is marked RLA 25 A and BCSC 26.5 A. Using only the rated-load/BCSC part of 440.12(A)(2) (ignore the locked-rotor check), what equivalent horsepower must the disconnect have? A. 7½ hp B. 15 hp C. 10 hp D. 20 hp

Question 30A motor control circuit tapped from the load side of the motor branch-circuit device uses 16 AWG copper conductors that stay inside the control enclosure. They are protected by the motor branch-circuit device under 430.72(B)(2). What is the maximum rating of that device? A. 10 A B. 25 A C. 100 A D. 40 A

Suggested time: 72 minutes

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Last verified November 11, 2026.