Free practice test · Iowa · 2023 NEC

Iowa journeyman electrician practice test

A free practice test for the Iowa journeyman electrician exam: 30 questions on the 2023 NEC, in the proportions of the official outline. No account needed. You get your score by subject and every answer explained.

How this test works

Part	Questions	Time at the exam's pace
Journeyman Electrician	30	68 minutes

Questions are spread over every subject area of the Iowa 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.

For code lookup speed, try the NEC code practice test. For the format, timing and what to bring, read the Iowa Journeyman Electrician exam guide.

The test

Question 1Write the trade size 1-1/4 as a decimal. A. 1.14 B. 1.4 C. 0.25 D. 1.25

Question 2A wire pull is measured at 8 ft 9 in. Write this length in decimal feet. A. 8.9 ft B. 8.09 ft C. 8.75 ft D. 105 ft

Question 3A spacer must not be more than 0.6 in thick. Four spacers are measured. Which one is over the limit? A. 5/8 in B. 0.595 in C. 19/32 in D. 0.58 in

Question 4An 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 5A branch circuit supplies a 46-A continuous load. THHN copper conductors; the terminals are not marked and the circuit is 100 A or less. No correction or adjustment factors apply. What is the minimum conductor size? A. 6 AWG B. 4 AWG C. 8 AWG D. 3 AWG

Question 6A branch circuit uses 12 AWG copper with 60°C terminals (20 A). No correction or adjustment applies. What is the largest continuous load it may carry under 210.19(A)(1)? A. 20 A B. 16 A C. 25 A D. 12.8 A

Question 7A branch circuit supplies 64 A of continuous and 10 A of noncontinuous load. Copper THWN, terminals rated 75°C, no correction or adjustment. What is the minimum conductor size? A. 4 AWG B. 2 AWG C. 3 AWG D. 6 AWG

Question 8Apply Table 220.55 Note 4. What is the branch-circuit load for one 12-kW household range? A. 12 kW B. 8 kW C. 9.6 kW D. 11 kW

Question 9A 7-kW counter-mounted cooktop and two 4-kW wall ovens in the same kitchen are supplied by one branch circuit. Applying Table 220.55 Note 6 (with Note 1), what is the branch-circuit load? A. 9.2 kW B. 15.0 kW C. 8.0 kW D. 14.0 kW

Question 10Apply Table 220.55 Note 4 (with Note 1). What is the branch-circuit load, in amperes at 240 V, for one 14.6-kW range? Round to 0.1 A. A. 36.7 A B. 60.8 A C. 38.3 A D. 33.3 A

Question 11Apply Table 220.55 Note 4 (with Note 1). A 15.3-kW range in an apartment is connected at 208 V. What is its branch-circuit load in amperes? Round to 0.1 A. A. 38.3 A B. 46.2 A C. 44.2 A D. 73.6 A

Question 12A box with no clamps and no grounding conductors has six 14 AWG conductors entering it and two single-pole switches, each on its own yoke. What is the required volume? A. 16.00 in.³ B. 22.50 in.³ C. 20.00 in.³ D. 12.00 in.³

Question 13Six 12 AWG equipment grounding conductors enter a box. Under 314.16(B)(5), what volume do the EGCs require? A. 2.25 in.³ B. 13.50 in.³ C. 5.63 in.³ D. 3.38 in.³

Question 14Two 14-2 cables with ground enter a ceiling box through cable connectors whose clamping mechanism is outside the box. The box has a luminaire stud. Inside, a 6-in. 14 AWG bare pigtail joins the two grounds to the box. What is the required volume? A. 14.00 in.³ B. 10.00 in.³ C. 12.00 in.³ D. 16.00 in.³

Question 15A 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 16What volume allowance does Table 314.16(B)(1) require for each 12 AWG conductor? A. 2.00 in.³ B. 2.50 in.³ C. 2.25 in.³ D. 1.75 in.³

Question 17A motor-compressor is marked with a rated-load current of 18 A and a branch-circuit selection current of 22 A. What minimum ampacity must its branch-circuit conductors have? A. 22.5 A B. 22 A C. 50 A D. 27.5 A

Question 18A motor-compressor has RLA 30 A and BCSC 33 A. Copper THWN conductors, terminals rated 75°C. What is the minimum branch-circuit conductor size? A. 8 AWG B. 10 AWG C. 6 AWG D. 4 AWG

Question 19Branch-circuit conductors to a motor-compressor are 10 AWG copper with 60°C terminals (30 A). What is the largest value the greater of the compressor's RLA or BCSC can be? A. 37.5 A B. 30 A C. 24 A D. 28 A

Question 20A 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 21A 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 22A pier feeder supplies 8 shore-power receptacles rated 50 A, 125/250 V. Applying the Table 220.120 demand factors, what is the demand load on each ungrounded conductor? A. 400 A B. 320 A C. 324 A D. 360 A

Question 23A 120/240-V marina feeder supplies 36 shore-power receptacles rated 30 A, 125 V, connected evenly between the two ungrounded conductors. Applying the Table 220.120 demand factors, what is the demand load on each ungrounded conductor? A. 324 A B. 648 A C. 378 A D. 540 A

Question 2424 shore-power pedestals each have one 50-A, 125/250-V receptacle and an individual kilowatt-hour submeter for the slip. Apply Table 220.120 and its Note 2. What is the final demand load on each ungrounded conductor of the 120/240-V feeder? A. 840 A B. 1,080 A C. 756 A D. 672 A

Question 25A 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 26An EVSE is rated 24 A. What minimum branch-circuit conductor ampacity does 210.19(A)(1) require, before any correction or adjustment? A. 24 A B. 30 A C. 27.6 A D. 36 A

Question 27An 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 28An EVSE can deliver up to 48 A, but its current setting is adjusted to 30 A with restricted access, as 625.42(B) permits. What is the minimum standard overcurrent device rating for its branch circuit? A. 60 A B. 40 A C. 30 A D. 50 A

Question 29IT equipment on a branch circuit draws 32 A. What minimum conductor ampacity does 645.5(A) require? A. 32 A B. 40 A C. 36.8 A D. 48 A

Question 30A server cabinet is rated 6,240 VA at 208 V, single-phase, and operates continuously (3 hours or more). What is the minimum standard overcurrent device rating for its branch circuit? A. 40 A B. 30 A C. 35 A D. 25 A

Suggested time: 68 minutes

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Last verified November 11, 2026.