Free Michigan Journeyman Electrician Test Questions
Four sample questions in the depth the Michigan Journeyman Electrician exam demands. Each one shows the controlling NEC article, the setup, and why the wrong answers look right. The real exam is 80 questions in 2 hours 30 minutes, open book on the 2023 NEC.
Last reviewed June 2026
Work these the way you will work the real thing. Read the question, decide which code section controls, then compute. Do not open the book until you have a hypothesis. When you want your gaps ranked instead of guessed, take the free Michigan diagnostic. 15 questions, no signup, your weakest NEC chapters ranked.
Question 1 of 4Branch circuits · 210.20
What is the maximum continuous load, in amperes, permitted on a 20A branch circuit?
A.12 A
B.16 Acorrect
C.20 A
D.24 A
Why B
Continuous load is limited to 80% of the overcurrent device rating. 20 × 0.80 = 16 A. The same rule drives 12 A on a 15A circuit and 24 A on a 30A circuit.
NEC 210.20(A)
Why the other answers look right
A:12 A is the continuous limit on a 15A circuit, not a 20A circuit.
C:20 A is the device rating, not the continuous limit. The 80% rule applies.
D:24 A is the continuous limit on a 30A circuit.
Question 2 of 4Grounding · Table 250.66
Service entrance conductors are 3/0 AWG copper. What is the minimum size copper grounding electrode conductor required?
A.8 AWG
B.6 AWG
C.4 AWGcorrect
D.2 AWG
Why C
Table 250.66 sizes the grounding electrode conductor from the largest ungrounded service conductor. Copper service conductors of 2/0 or 3/0 call for a 4 AWG copper GEC.
NEC 250.66, Table 250.66
Why the other answers look right
A:8 AWG applies when the service conductors are 2 AWG or smaller.
B:6 AWG applies to 1 AWG or 1/0 service conductors.
D:2 AWG is the next row up, for service conductors over 3/0 through 350 kcmil.
Question 3 of 4Box fill · 314.16
Six 14 AWG insulated conductors terminate in a box that contains no clamps, no devices, and no equipment grounding conductors. What minimum box volume is required?
A.10.0 cu in
B.12.0 cu incorrect
C.13.5 cu in
D.18.0 cu in
Why B
Table 314.16(B) assigns each 14 AWG conductor a 2.00 cu in volume allowance. Six conductors × 2.00 = 12.0 cu in. With no clamps, devices, or grounds in the box, nothing else counts.
NEC 314.16(B), Table 314.16(B)
Why the other answers look right
A:10.0 cu in only covers five 14 AWG conductors. There are six.
C:13.5 cu in uses the 2.25 cu in allowance for 12 AWG. These conductors are 14 AWG.
D:18.0 cu in would mean counting items the question says are not in the box.
Question 4 of 4Voltage drop · Chapter 9 Table 8
A single-phase 240V circuit runs 100 ft on 12 AWG copper (6,530 cmil) carrying 16 A. Using Vd = (2 × K × I × L) / cmil with K = 12.9, what is the approximate round-trip voltage drop?
A.About 3.2 V
B.About 6.3 Vcorrect
C.About 9.5 V
D.About 12.6 V
Why B
Vd = (2 × 12.9 × 16 × 100) / 6,530 = 6.3 V. That is about 2.6% on a 240V circuit, inside the 3% branch-circuit target the NEC suggests in an informational note. The cmil value comes from Chapter 9 Table 8.
NEC 210.19 informational note, Chapter 9 Table 8
Why the other answers look right
A:3.2 V drops the doubling factor and only counts one leg of the run.
C:9.5 V would take roughly a 150 ft run at this load, not 100 ft.
D:12.6 V doubles the correct answer. Check the setup, not the arithmetic.
What good Michigan test questions have in common
The Michigan exam is open book, so a question that only checks whether you memorized a number is training the wrong skill. The four samples above each force a decision first: which article controls, which table applies, which inputs go in the formula. On the real exam the trap answer usually comes from a neighboring rule, a neighboring table row, or a dropped factor. That is why every question here explains the wrong answers, not just the right one.
The full bank works the same way. Every question cites its 2023 NEC article, and the practice engine surfaces more questions from the chapters where you miss. Timed runs in the Michigan practice test format then rehearse pacing, and the calculations practice page drills the math types one at a time.
Michigan prep checks before you pay
If you searched for Michigan journeyman electrician practice test, Michigan electrician exam prep online, Michigan journeyman exam simulator, or Michigan electrician exam questions, do not judge the page by question count alone. Those searches all ask the same thing: does this prep match the LARA and PSI journeyman exam, or is it a generic NEC quiz with Michigan in the title?
Format
80 questions in 2 hours 30 minutes, with 75% to pass.
Reference rule
Open book on the 2023 NEC, with bound references and factory tabs only.
Study target
Fast 2023 NEC lookup, calculation setup, grounding, motors, fill, and Michigan Part 8 awareness.
First step
Diagnostic first, then practice ordered by the NEC chapters behind your misses.
It still says the Michigan journeyman exam is 70% or based on an old NEC edition.
It sells copied PSI questions instead of original questions with NEC article references.
It pushes a huge quiz bank before showing which chapter is actually weak.
15 questions across the NEC chapters the Michigan exam tests. No signup. You leave with your weakest chapters in priority order, so your next study block is the right one.
