Michigan Electrical Inspector (National Electrical Code)
Competency Study Guide
Comprehensive Resource To Help You Ace 2026-2027 Exams
Includes Frequently Tested Questions With ELABORATED
100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. To guard live parts over 50V but less than 600V, equipment is permitted to be
- Correct Answer: located on a balcony accessible only to qualified persons
located in a room only accessible to
qualified persons
elevated 8 ft or more above floor or other working surface
2. Overhead feeder conductors (≤300V to ground) shall have a minimum vertical
clearance over residential property and driveways of:
A. 10 ft
B. 12 ft
C. 15 ft
D. 18 ft
Answer: B. 12 ft
2. Where rear access is required to work on de-energized parts on the back of
enclosed equipment, the minimum horizontal working space shall be:
A. 24 inches
B. 30 inches
C. 36 inches
,D. 48 inches
Answer: C. 36 inches
3. The maximum length of 18 AWG fixture wire tapped to a 20-amp branch
circuit is:
A. 25 ft
B. 40 ft
C. 50 ft
D. 75 ft
Answer: C. 50 ft
4. A power-operated service disconnecting means shall be capable of manual
operation in the event of:
A. Overload
B. Short circuit
C. Ground fault
D. Power supply failure
Answer: D. Power supply failure
5. Conductors are considered outside a building when buried under at least:
A. 1 inch of concrete
B. 2 inches of concrete
C. 3 inches of concrete
D. 4 inches of concrete
Answer: B. 2 inches of concrete
6. For straight pulls, the minimum length of a box shall be ______ times the
trade size of the largest raceway:
A. 6
,B. 7
C. 8
D. 10
Answer: C. 8
7. At least one receptacle outlet shall be installed within ______ of the top of a
show window for each 12 linear feet:
A. 12 inches
B. 15 inches
C. 18 inches
D. 24 inches
Answer: C. 18 inches
8. Ground-fault protection of equipment is required for solidly grounded wye
systems (150V–600V) for service disconnects rated:
A. 800A or more
B. 1000A or more
C. 1200A or more
D. 1500A or more
Answer: B. 1000A or more
9. Floor receptacles shall not count toward required wall receptacles unless
located within ______ of the wall:
A. 12 inches
B. 15 inches
C. 18 inches
D. 24 inches
Answer: C. 18 inches
, 10. Exposed live parts of motors and controllers operating at ______ or more
shall be guarded:
A. 30V
B. 50V
C. 75V
D. 100V
Answer: B. 50V
11. Lighting track shall not be installed less than ______ above the finished floor
unless protected:
A. 4 ft
B. 5 ft
C. 6 ft
D. 7 ft
Answer: B. 5 ft
12. Each general care patient bed location shall have a minimum of ______
receptacles:
A. 2
B. 3
C. 4
D. 6
Answer: C. 4
13. Which appliance in a dwelling unit is permitted to have a 24-inch cord with
attachment plug?
A. Refrigerator
B. Dishwasher
C. Range hood/microwave combination
Competency Study Guide
Comprehensive Resource To Help You Ace 2026-2027 Exams
Includes Frequently Tested Questions With ELABORATED
100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. To guard live parts over 50V but less than 600V, equipment is permitted to be
- Correct Answer: located on a balcony accessible only to qualified persons
located in a room only accessible to
qualified persons
elevated 8 ft or more above floor or other working surface
2. Overhead feeder conductors (≤300V to ground) shall have a minimum vertical
clearance over residential property and driveways of:
A. 10 ft
B. 12 ft
C. 15 ft
D. 18 ft
Answer: B. 12 ft
2. Where rear access is required to work on de-energized parts on the back of
enclosed equipment, the minimum horizontal working space shall be:
A. 24 inches
B. 30 inches
C. 36 inches
,D. 48 inches
Answer: C. 36 inches
3. The maximum length of 18 AWG fixture wire tapped to a 20-amp branch
circuit is:
A. 25 ft
B. 40 ft
C. 50 ft
D. 75 ft
Answer: C. 50 ft
4. A power-operated service disconnecting means shall be capable of manual
operation in the event of:
A. Overload
B. Short circuit
C. Ground fault
D. Power supply failure
Answer: D. Power supply failure
5. Conductors are considered outside a building when buried under at least:
A. 1 inch of concrete
B. 2 inches of concrete
C. 3 inches of concrete
D. 4 inches of concrete
Answer: B. 2 inches of concrete
6. For straight pulls, the minimum length of a box shall be ______ times the
trade size of the largest raceway:
A. 6
,B. 7
C. 8
D. 10
Answer: C. 8
7. At least one receptacle outlet shall be installed within ______ of the top of a
show window for each 12 linear feet:
A. 12 inches
B. 15 inches
C. 18 inches
D. 24 inches
Answer: C. 18 inches
8. Ground-fault protection of equipment is required for solidly grounded wye
systems (150V–600V) for service disconnects rated:
A. 800A or more
B. 1000A or more
C. 1200A or more
D. 1500A or more
Answer: B. 1000A or more
9. Floor receptacles shall not count toward required wall receptacles unless
located within ______ of the wall:
A. 12 inches
B. 15 inches
C. 18 inches
D. 24 inches
Answer: C. 18 inches
, 10. Exposed live parts of motors and controllers operating at ______ or more
shall be guarded:
A. 30V
B. 50V
C. 75V
D. 100V
Answer: B. 50V
11. Lighting track shall not be installed less than ______ above the finished floor
unless protected:
A. 4 ft
B. 5 ft
C. 6 ft
D. 7 ft
Answer: B. 5 ft
12. Each general care patient bed location shall have a minimum of ______
receptacles:
A. 2
B. 3
C. 4
D. 6
Answer: C. 4
13. Which appliance in a dwelling unit is permitted to have a 24-inch cord with
attachment plug?
A. Refrigerator
B. Dishwasher
C. Range hood/microwave combination
