Michigan Electrical Inspector {National Electrical Code} Competency Study Guide Comprehensive Resource To Help You Ace Exams Includes Frequently Tested Questions With ELABORATED 100% Correct COMPLETE SOLUTIONS Guaranteed Pass First Attemp

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. Where outside, aluminum or copper-clad aluminum grounding electrode
conductors shall not be terminated within ____in. of Earth.
A. 12 in.
B. 18 in.
C. 24 in.

D. 36 in. - Correct Answer: B. 18 in.


2. When used by personnel during construction, remodeling, maintenance repair,
or demolition of a building, GFCI (ground fault circuit interrupter) protection is
required for all 125 volt _____?
A. 15 ampere receptacles
B. 15, and 20 ampere receptacles
C. 15, 20, and 30 ampere receptacles

D. Loads - Correct Answer: C. 15, 20 and 30 ampere receptacles

,3. In an unfinished basement, the smallest NM wire attached to the bottom of
the edge of a floor joist is?
A. 2- #6 AWG
B. 3- #6 AWG
C. 3- #8 AWG

D. A & C - Correct Answer: D. A & C 2- #6 AWG and 3-#8 AWG


4. For a flexible power supply cord, what is the minimum size conductor that can
be used?
A. 16 AWG
B. 14 AWG
C. 12 AWG

D. 10 AWG - Correct Answer: A. 16 AWG


5. A neutral conductor is terminated under a screw terminal in the neutral
ground bus of a service panel. The number of other conductors that can be
terminated with this conductor, under the same terminal, is?
A. Zero
B. One, of any wire type
C. One, if it is the equipment grounding conductor of the circuit.

D. Two wires of any type - Correct Answer: A. Zero


6. What is the highest voltage-amperes permitted for a class-1 power limited
circuit?

,A. 100 volt-amperes
B. 250 volt-amperes
C. 500 volt-amperes

D. 1,000 volt-amperes - Correct Answer: D. 1,000 volt-amperes


7. What is the minimum distance a concealed or visible bored hole can be from
the edge of a wood member?
A. 3/4 inch
B. 1 inch
C. 1 1/4 inches

D. 1 1/2 inches - Correct Answer: C.


8. Ballasts, transformers, and electric power shall be permitted to be located in
attics and soffits. What are the dimensions required for an access door,
passageway, and permanent walkway? - Correct Answer: Access door- 36
inches x 22 1/2 inches
Passageway- 13 feet high by 2 feet wide
Walkway- 12 inches


9. Surge arrestors are grounded a the arrestor grounding terminal, and if the
arrestor grounding conductor is run in a metal enclosure, the ____ end(s) of
the enclosure.
A. One
B. The supply
C. The load

, D. Both ends - Correct Answer: D. Both Ends


10.The minimum depth for any underwater lighting fixture is 18 inches below
water unless listed otherwise.
A. True

B. False - Correct Answer: A. True


11.For electrically operated in-sink waste disposers, what is the minimum and
maximum length allowed for the electrical cable?
A. 12-24 inches
B. 16-28 inches
C. 18-36 inches

D. 24-48 inches - Correct Answer: C. 18-36 inches


12.An outlet for servicing a rooftop electrical air conditioning unit shall be within
___ft. from air conditioning unit.
A. 10
B. 15
C. 20

D. 25 - Correct Answer: D. 25


13.What is the minimum required cubic inch space for a #14 conductor in a box?
A. 1.50 in cubed
B. 1.75 in cubed