Michigan Electrical Inspector 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. If the cover for an underground pull box used for circuits over 600V is not
locked, bolted, or screwed in place, it must weigh at least:
A. 50 pounds
B. 75 pounds
C. 100 pounds
D. 150 pounds
Answer: C. 100 pounds
2. The maximum allowable voltage drop on a branch circuit is:
A. 2%
B. 3%
C. 5%
D. 10%
Answer: B. 3%
3. Floors of vaults in contact with the earth shall be concrete not less than:
A. 4 inches thick
B. 5 inches thick
C. 6 inches thick
D. 8 inches thick
Answer: C. 6 inches thick
,4. According to the NEC, bare live parts must be guarded by all of the following
methods EXCEPT:
A. Location in a room accessible only to qualified persons
B. Installation in enclosures
C. Elevation above working space
D. Protection by fireproof curtain
Answer: D. Protection by fireproof curtain
5. Equipment associated with an electrical installation may extend into the
working space provided it does not exceed:
A. 3 inches
B. 6 inches
C. 12 inches
D. 18 inches
Answer: B. 6 inches
6. When the NEC uses the phrase “shall be permitted,” it indicates that the
action is:
A. Mandatory
B. Prohibited
C. Optional
D. Conditional only
Answer: C. Optional
7. A 120V, 15- or 20-amp receptacle must be located within ______ of HVAC
equipment:
A. 10 feet
B. 15 feet
C. 20 feet
,D. 25 feet
Answer: D. 25 feet
8. In NEC terminology, which words indicate a mandatory requirement?
A. May
B. Should
C. Shall
D. Can
Answer: C. Shall
9. According to New York City code, an individual branch circuit must be
provided for each:
A. Refrigerator
B. Dishwasher
C. Air conditioner
D. Lighting outlet
Answer: C. Air conditioner
10. The required working space for live parts operating at 300V (exposed on
both sides) is:
A. 3 feet
B. 3.5 feet
C. 4 feet
D. 5 feet
Answer: C. 4 feet
11. The conductor connected to the screw shell of a lampholder must be
identified by:
A. Black insulation
, B. Red insulation
C. White or gray insulation
D. Green insulation
Answer: C. White or gray insulation
12. For balconies, decks, or porches with a usable area of 20 sq ft, the required
number of receptacles is:
A. None
B. One
C. Two
D. Three
Answer: B. One
13. When multiple systems share a raceway, neutrals of other systems must be
identified by:
A. Green insulation
B. Black insulation
C. White with a colored stripe (not green)
D. Bare conductor
Answer: C. White with a colored stripe (not green)
14. The maximum distance between a dedicated appliance outlet and the
appliance is:
A. 3 feet
B. 4 feet
C. 5 feet
D. 6 feet
Answer: D. 6 feet
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. If the cover for an underground pull box used for circuits over 600V is not
locked, bolted, or screwed in place, it must weigh at least:
A. 50 pounds
B. 75 pounds
C. 100 pounds
D. 150 pounds
Answer: C. 100 pounds
2. The maximum allowable voltage drop on a branch circuit is:
A. 2%
B. 3%
C. 5%
D. 10%
Answer: B. 3%
3. Floors of vaults in contact with the earth shall be concrete not less than:
A. 4 inches thick
B. 5 inches thick
C. 6 inches thick
D. 8 inches thick
Answer: C. 6 inches thick
,4. According to the NEC, bare live parts must be guarded by all of the following
methods EXCEPT:
A. Location in a room accessible only to qualified persons
B. Installation in enclosures
C. Elevation above working space
D. Protection by fireproof curtain
Answer: D. Protection by fireproof curtain
5. Equipment associated with an electrical installation may extend into the
working space provided it does not exceed:
A. 3 inches
B. 6 inches
C. 12 inches
D. 18 inches
Answer: B. 6 inches
6. When the NEC uses the phrase “shall be permitted,” it indicates that the
action is:
A. Mandatory
B. Prohibited
C. Optional
D. Conditional only
Answer: C. Optional
7. A 120V, 15- or 20-amp receptacle must be located within ______ of HVAC
equipment:
A. 10 feet
B. 15 feet
C. 20 feet
,D. 25 feet
Answer: D. 25 feet
8. In NEC terminology, which words indicate a mandatory requirement?
A. May
B. Should
C. Shall
D. Can
Answer: C. Shall
9. According to New York City code, an individual branch circuit must be
provided for each:
A. Refrigerator
B. Dishwasher
C. Air conditioner
D. Lighting outlet
Answer: C. Air conditioner
10. The required working space for live parts operating at 300V (exposed on
both sides) is:
A. 3 feet
B. 3.5 feet
C. 4 feet
D. 5 feet
Answer: C. 4 feet
11. The conductor connected to the screw shell of a lampholder must be
identified by:
A. Black insulation
, B. Red insulation
C. White or gray insulation
D. Green insulation
Answer: C. White or gray insulation
12. For balconies, decks, or porches with a usable area of 20 sq ft, the required
number of receptacles is:
A. None
B. One
C. Two
D. Three
Answer: B. One
13. When multiple systems share a raceway, neutrals of other systems must be
identified by:
A. Green insulation
B. Black insulation
C. White with a colored stripe (not green)
D. Bare conductor
Answer: C. White with a colored stripe (not green)
14. The maximum distance between a dedicated appliance outlet and the
appliance is:
A. 3 feet
B. 4 feet
C. 5 feet
D. 6 feet
Answer: D. 6 feet
