Michigan Journeyman test
Questions With Complete
Solutions
1. What is the minimum size copper grounding electrode conductor required for a
200-amp residential service?
A. No. 8 AWG
B. No. 4 AWG
C. No. 6 AWG
D. No. 2 AWG
✅ Answer: C. No. 6 AWG
Explanation: NEC 250.66 — A 200A service requires a minimum No. 6 AWG copper
grounding electrode conductor when connected to a ground rod.
2. What is the maximum number of conductors allowed in a ¾-inch EMT containing
#12 THHN wires before derating must be applied?
A. 6
B. 9
C. 10
D. 16
✅ Answer: C. 10
Explanation: NEC Chapter 9, Table 1 and Table 5 — More than 3 current-carrying
conductors require derating.
3. What is the standard voltage drop recommendation for branch circuits?
A. 3%
B. 5%
C. 2%
,D. 10%
✅ Answer: A. 3%
Explanation: NEC Informational Note — Recommended maximum 3% voltage drop
on branch circuits, 5% total on feeders and branch combined.
4. Minimum burial depth for PVC conduit under a residential driveway is:
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
✅ Answer: D. 24 inches
Explanation: NEC Table 300.5 — PVC under driveways requires 24" cover.
5. The minimum working space in front of a 480V panelboard is:
A. 2 feet
B. 3 feet
C. 3.5 feet
D. 4 feet
✅ Answer: B. 3 feet
Explanation: NEC 110.26(A)(1) — Minimum depth of working space for 0–600V
equipment is 3 ft.
6. What color insulation is required for the grounded conductor in a 120/240V
single-phase system?
A. Green
B. White or gray
C. Red
D. Black
✅ Answer: B. White or gray
,Explanation: NEC 200.6 — Grounded conductors must be white or gray.
7. Receptacles in bathrooms must be protected by:
A. AFCI only
B. GFCI only
C. Both AFCI and GFCI
D. No protection required
✅ Answer: B. GFCI only
Explanation: NEC 210.8(A)(1) — Bathrooms require GFCI protection.
8. What is the maximum overcurrent device for #12 copper wire?
A. 15 amps
B. 20 amps
C. 25 amps
D. 30 amps
✅ Answer: B. 20 amps
Explanation: NEC 240.4(D)(5) — #12 AWG copper is limited to 20A maximum.
9. When installing NM-B cable in an attic, how far must it be kept from the edge of a
scuttle hole or attic entry?
A. 3 inches
B. 6 inches
C. 12 inches
D. 24 inches
✅ Answer: C. 12 inches
Explanation: NEC 334.23 — NM cable within 6 ft of an attic scuttle must be
protected.
, 10. The minimum ampacity of a feeder for a 100A subpanel with continuous load of
80A is:
A. 80A
B. 100A
C. 125A
D. 150A
✅ Answer: C. 125A
Explanation: NEC 210.19(A)(1) — Continuous loads must be rated at 125% of the
load.
11. In Michigan, a Journeyman Electrician license requires at least how many hours
of practical experience?
A. 4,000
B. 6,000
C. 8,000
D. 10,000
✅ Answer: C. 8,000
Explanation: Michigan Electrical Code — 8,000 hours (4 years) of experience
required.
12. A disconnect for an air conditioner must be located:
A. Anywhere on the property
B. Within sight and readily accessible from the unit
C. Inside the dwelling
D. 50 ft away
✅ Answer: B. Within sight and readily accessible from the unit
Explanation: NEC 440.14 — The disconnecting means must be within sight and
readily accessible.
Questions With Complete
Solutions
1. What is the minimum size copper grounding electrode conductor required for a
200-amp residential service?
A. No. 8 AWG
B. No. 4 AWG
C. No. 6 AWG
D. No. 2 AWG
✅ Answer: C. No. 6 AWG
Explanation: NEC 250.66 — A 200A service requires a minimum No. 6 AWG copper
grounding electrode conductor when connected to a ground rod.
2. What is the maximum number of conductors allowed in a ¾-inch EMT containing
#12 THHN wires before derating must be applied?
A. 6
B. 9
C. 10
D. 16
✅ Answer: C. 10
Explanation: NEC Chapter 9, Table 1 and Table 5 — More than 3 current-carrying
conductors require derating.
3. What is the standard voltage drop recommendation for branch circuits?
A. 3%
B. 5%
C. 2%
,D. 10%
✅ Answer: A. 3%
Explanation: NEC Informational Note — Recommended maximum 3% voltage drop
on branch circuits, 5% total on feeders and branch combined.
4. Minimum burial depth for PVC conduit under a residential driveway is:
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
✅ Answer: D. 24 inches
Explanation: NEC Table 300.5 — PVC under driveways requires 24" cover.
5. The minimum working space in front of a 480V panelboard is:
A. 2 feet
B. 3 feet
C. 3.5 feet
D. 4 feet
✅ Answer: B. 3 feet
Explanation: NEC 110.26(A)(1) — Minimum depth of working space for 0–600V
equipment is 3 ft.
6. What color insulation is required for the grounded conductor in a 120/240V
single-phase system?
A. Green
B. White or gray
C. Red
D. Black
✅ Answer: B. White or gray
,Explanation: NEC 200.6 — Grounded conductors must be white or gray.
7. Receptacles in bathrooms must be protected by:
A. AFCI only
B. GFCI only
C. Both AFCI and GFCI
D. No protection required
✅ Answer: B. GFCI only
Explanation: NEC 210.8(A)(1) — Bathrooms require GFCI protection.
8. What is the maximum overcurrent device for #12 copper wire?
A. 15 amps
B. 20 amps
C. 25 amps
D. 30 amps
✅ Answer: B. 20 amps
Explanation: NEC 240.4(D)(5) — #12 AWG copper is limited to 20A maximum.
9. When installing NM-B cable in an attic, how far must it be kept from the edge of a
scuttle hole or attic entry?
A. 3 inches
B. 6 inches
C. 12 inches
D. 24 inches
✅ Answer: C. 12 inches
Explanation: NEC 334.23 — NM cable within 6 ft of an attic scuttle must be
protected.
, 10. The minimum ampacity of a feeder for a 100A subpanel with continuous load of
80A is:
A. 80A
B. 100A
C. 125A
D. 150A
✅ Answer: C. 125A
Explanation: NEC 210.19(A)(1) — Continuous loads must be rated at 125% of the
load.
11. In Michigan, a Journeyman Electrician license requires at least how many hours
of practical experience?
A. 4,000
B. 6,000
C. 8,000
D. 10,000
✅ Answer: C. 8,000
Explanation: Michigan Electrical Code — 8,000 hours (4 years) of experience
required.
12. A disconnect for an air conditioner must be located:
A. Anywhere on the property
B. Within sight and readily accessible from the unit
C. Inside the dwelling
D. 50 ft away
✅ Answer: B. Within sight and readily accessible from the unit
Explanation: NEC 440.14 — The disconnecting means must be within sight and
readily accessible.
