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. When calculating the total load for a mobile home park before demand factors
are taken into consideration, each individual mobile home lot shall be calculated
at a MIN. of ____.
A. 20,000 VA
B. 15,000 VA
C. 24,000 VA

D. 16,000 VA - Correct Answer: D. 16,000 VA


2. A single grounding electrode consisting of a ground rod, pipe, or plate that does
not have a resistance to ground of 25 ohms or less, shall be supplemented by one
additional electrode. Which of the following listed is/are approved for this
purpose?
A. a concrete encased electrode
B. a ground ring
C. the metal frame of the building

D. all of these - Correct Answer: D. all of these

,3. It shall be permissible to compute the feeder and service loads for dwellings
using the optimal method of calculations for dwellings instead of the general
method of calculations for dwellings, if the dwelling unit is supplied with a single-
phase, 120/240 volt service and the load is at LEAST ____ or greater.
A. 100 amperes
B. 125 amperes
C. 200 amperes

D. 150 amperes - Correct Answer: A. 100 amperes


4. In the critical care (Category 1) spaces of a health care facility, each patient bed
location shall be provided with a MIN. of ____ "hospital grade" receptacles.
A. fourteen
B. twelve
C. ten

D. eight - Correct Answer: A. fourteen


5. Nonmetallic surface extensions shall be permitted to be run in any direction
from an existing outlet, but NOT within ____ of the floor level.
A. 1 ft.
B. 1.5 ft.
C. 2 ft.

D. 2 in. - Correct Answer: D. 2 in.


6. The NEC permits a building to have more than one service when:

,I. the load requirements f the building are at least in excess of 800 amperes
II. the building is separated by firewalls with a four hour rating
A. I only
B. II only
C. either 1 or II

D. neither I nor II - Correct Answer: D. neither I nor II


7. In the garage of a dwelling unit, a 125 volt, single phase, 15 ampere receptacle
installed in the ceiling provided for the garage door opener must be ____.
I. a single receptacle
II. GFCI protected for personnel
A. I only
B. II only
C. either I or II

D. neither I nor II - Correct Answer: B. II only


8. Underground installed service conductors that are not encased in concrete and
buried 18 in. or more below grade level, shall have their location identified by a
warning ribbon placed at LEAST ____ above the underground installation.
A. 6 in.
B. 8 in.
C. 12 in.

D. 18 in. - Correct Answer: C. 12 in.

, 9. Outlets supplying permanently installed swimming pool pump motors from
single phase, 15- or 20-ampere, 120- or 240-volt branch circuits, shall be provided
with Class A GFCI protection ____.
A. where installed outdoors
B. when cord-and-plug connected
C. when direct (hard wired) connected

D. where any of the above conditions exist - Correct Answer: D. where any of
the above conditions exist


10. The branch circuit conductors supplying a 240 volt, single phase, 15 kW rated
fixed electric space heater provided with a 10 ampere blower motor are required
to have an ampacity of at LEAST ____.
A. 63 amperes
B. 78 amperes
C. 91 amperes

D. 109 amperes - Correct Answer: C. 91 amperes


11. A commercial kitchen is to contain the following listed cooking related
equipment:
* one - 14 kW range
* one - 5 kW water heater
* one - .75 kW mixer
* one - 2.5 kW dishwasher
* one - 2 kW booster heater
* one - 2 kW broiler