Electrical Inspection/ Electrical {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. What the the implications of over sized breakers. - Correct Answer:
Oversized breakers will allow wires to overheat without tripping.
2. What does the term "double tap" means? - Correct Answer: 2 wires are
connected to a single terminal
3. The red & black wires of multi-wire circuits should be on separate bus bars.
True or False - Correct Answer: True
4. List 4 common problems found only with fuses. - Correct Answer: Fuses
bypassed
Fuses loose
Fuse holders loose or broken
Fuses for multi-wire circuit not linked
5. List 4 common problems only with breakers. - Correct Answer: Multi-
wire circuits not linked
Too many breakers
, Wrong breaker in panel
Loose breaker
6. List 7 common problems found with wires in panels. - Correct Answer:
Sheathing not removed
Overheating
Loose connections
Damaged
Not well secured
Wires crossing bus bars
Abandoned wires in the panel
7. What is a split receptacle? - Correct Answer: A split receptacle has the
top part of the outlet on one circuit and the bottom part on a different
circuit.
8. What is meant by linking in multi-wire branch circuit? - Correct Answer:
Linking means that the fuses or breakers for multi-wire branch circuits have
to be shut off in pairs.
9. Explain why fused neutrals are a bad idea. - Correct Answer: 1. There
are dangerous because only the fuse on the neutral side blows.
2. The circuit may not work, but there may be voltage throughout the entire
circuit.
10.How should the feeder wires to a sub-panel from the main panel ideally be
protected?
a) No fusing necessary
, b) The main house fuses or breakers will protect the wire.
c) Fuses should be provided at the subpanel.
d) Fuses should be provided at the main panel. - Correct Answer: d)
Fuses should be provided at the main panel.
11.Should the neutral and the ground wires be bonded together at the sub-
panel? - Correct Answer: No. Because electricity may flow through the
ground wire under normal circumstances. The ground wire should be
reserved for emergency situations.
12.What is the implication of a panel that is too small for the service? -
Correct Answer: panel may overheat.
13.List 16 conditions that may be found in all panels.
Correct Answer: A) Obsolete & fused neutrals
B) Damaged panel or components
C) Loose panel
D) Inappropriate support materials
E) loose or missing door
F) openings in panel
G) panel too small
H) overheating
I) rust or water in panel
J) circuits not labeled
K) Crowded
L) poor access
M) installed upside down
N) not suitable for aluminum wiring
, O) poor location
P) outdoor panel not weather-tight
14.Which of the following should be included in a home inspection?
(pick2)
a) low voltage system
b) operation of all smoke detectors
c) polarity of some receptacles
d) grounding of all exterior outlets
e) operation of all GFCIs - Correct Answer: c) polarity of some
receptacles
f) operation of all GFCIs
15.List 5 different branch wire materials you might see. - Correct Answer: -
Copper
-Aluminum
-Copper clad aluminum
-Solder
-dripped copper
16.Describe 3 different cable types you might see. - Correct Answer: -
NM,Romex, Loomex
-UF or NMWU
-BX (AC-90), armored cable
-Knob & tube
17.What is the difference between insulation and sheathing? - Correct
Answer: Insulation is around the individual wires.
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. What the the implications of over sized breakers. - Correct Answer:
Oversized breakers will allow wires to overheat without tripping.
2. What does the term "double tap" means? - Correct Answer: 2 wires are
connected to a single terminal
3. The red & black wires of multi-wire circuits should be on separate bus bars.
True or False - Correct Answer: True
4. List 4 common problems found only with fuses. - Correct Answer: Fuses
bypassed
Fuses loose
Fuse holders loose or broken
Fuses for multi-wire circuit not linked
5. List 4 common problems only with breakers. - Correct Answer: Multi-
wire circuits not linked
Too many breakers
, Wrong breaker in panel
Loose breaker
6. List 7 common problems found with wires in panels. - Correct Answer:
Sheathing not removed
Overheating
Loose connections
Damaged
Not well secured
Wires crossing bus bars
Abandoned wires in the panel
7. What is a split receptacle? - Correct Answer: A split receptacle has the
top part of the outlet on one circuit and the bottom part on a different
circuit.
8. What is meant by linking in multi-wire branch circuit? - Correct Answer:
Linking means that the fuses or breakers for multi-wire branch circuits have
to be shut off in pairs.
9. Explain why fused neutrals are a bad idea. - Correct Answer: 1. There
are dangerous because only the fuse on the neutral side blows.
2. The circuit may not work, but there may be voltage throughout the entire
circuit.
10.How should the feeder wires to a sub-panel from the main panel ideally be
protected?
a) No fusing necessary
, b) The main house fuses or breakers will protect the wire.
c) Fuses should be provided at the subpanel.
d) Fuses should be provided at the main panel. - Correct Answer: d)
Fuses should be provided at the main panel.
11.Should the neutral and the ground wires be bonded together at the sub-
panel? - Correct Answer: No. Because electricity may flow through the
ground wire under normal circumstances. The ground wire should be
reserved for emergency situations.
12.What is the implication of a panel that is too small for the service? -
Correct Answer: panel may overheat.
13.List 16 conditions that may be found in all panels.
Correct Answer: A) Obsolete & fused neutrals
B) Damaged panel or components
C) Loose panel
D) Inappropriate support materials
E) loose or missing door
F) openings in panel
G) panel too small
H) overheating
I) rust or water in panel
J) circuits not labeled
K) Crowded
L) poor access
M) installed upside down
N) not suitable for aluminum wiring
, O) poor location
P) outdoor panel not weather-tight
14.Which of the following should be included in a home inspection?
(pick2)
a) low voltage system
b) operation of all smoke detectors
c) polarity of some receptacles
d) grounding of all exterior outlets
e) operation of all GFCIs - Correct Answer: c) polarity of some
receptacles
f) operation of all GFCIs
15.List 5 different branch wire materials you might see. - Correct Answer: -
Copper
-Aluminum
-Copper clad aluminum
-Solder
-dripped copper
16.Describe 3 different cable types you might see. - Correct Answer: -
NM,Romex, Loomex
-UF or NMWU
-BX (AC-90), armored cable
-Knob & tube
17.What is the difference between insulation and sheathing? - Correct
Answer: Insulation is around the individual wires.
