NHIE Electrical Exam Questions with
100% Correct Answers Updated 2024-
2025
What does code say about bends in NM conduit? - Answer- No sharp bends; max 5x
cable diameter.
What must you do if you run more than 2 wires through the same fireblocked wood
framing hole? - Answer- Wires must be derated.
What is UF wire? - Answer- Underground feeder cable.
What are the rules when using UF cable on the interior of a home? - Answer- Same as
NM wiring.
When must UF cable be protected? - Answer- Cable emerging from the ground must be
protected from within 18" below grade to 8' above grade where exposed.
What does SE cable mean? - Answer- Service entrance cable. Typically meant for
service entrance cable.
When SE cable is used inside the home, what rules apply? - Answer- Same rules as
NM cable.
What is AC or "BX" cable? - Answer- Armored cable.
What are the rules for AC (BX) cable? - Answer- - Dry locations only.
- Anti-short bushings (redheads) required.
What does MC cable stand for? - Answer- Metal clad.
What are the rules for MC cable installation? - Answer- - Supports 6' or less apart and
less than 12" from box.
- Secure to boxes & cabinets w/ fittings listed for MC.
Any openings to conduit systems must remain what? - Answer- Must remain accessible.
No __________ ___________ ___________ w/ metal raceways. - Answer- Common
plastic boxes.
No splices in small or radius conduit raceways. - Answer- FYI.
, What is the max degree of turn between pull stations in raceways? - Answer- 360
degrees max.
Is an underground raceway considered a wet or dry location? - Answer- Wet location.
Is the interior of above ground raceways considered wet or dry locations? - Answer-
Wet locations.
When talking about per percentage of conduit/tubing that wiring can fill up, what is the
max allowed when 2 or more conductors is used? - Answer- Max of 40% filled.
What are the most common types of raceway conduit? - Answer- - Electrical Metal
Tubing (EMT) (thinwall)
- Flexible Metal Conduit (FMC) (greenfield/flex)
- Liquidtight Flexible Metal Conduit (LFMC) (Sealtight)
- Rigid PVC (Sched 80 only)
What is the min service amperage for a single family dwelling? - Answer- 100A
All other services, min 60A.
How many services allowed per dwelling? - Answer- One
All underground raceways must be sealed when what? - Answer- When they enter the
main panel.
What is a warning ribbon and where should it be? - Answer- It is an identifier for the
service lateral.
It must be buried 12" or more above service conductors.
What wires are allowed on the service mast? - Answer- Only conductors. No CATV or
phone lines.
No unsupported couplings above the roof. - Answer- FYI
Conduit hubs must be identified for use w/ service equipment. - Answer- FYI
What kind of pipe is required for service entrance/laterals? - Answer- Must be metal
pipe; plumbing pipe or fittings are prohibited.
How far out from the service box must the conduit be secured? - Answer- 3'
Is the meter base alone considered service equipment? - Answer- No. Not by itself.
Where should the service disconnect be? - Answer- Readily accessible. Must be inside
or outside nearest point of entrance of service conductors.
100% Correct Answers Updated 2024-
2025
What does code say about bends in NM conduit? - Answer- No sharp bends; max 5x
cable diameter.
What must you do if you run more than 2 wires through the same fireblocked wood
framing hole? - Answer- Wires must be derated.
What is UF wire? - Answer- Underground feeder cable.
What are the rules when using UF cable on the interior of a home? - Answer- Same as
NM wiring.
When must UF cable be protected? - Answer- Cable emerging from the ground must be
protected from within 18" below grade to 8' above grade where exposed.
What does SE cable mean? - Answer- Service entrance cable. Typically meant for
service entrance cable.
When SE cable is used inside the home, what rules apply? - Answer- Same rules as
NM cable.
What is AC or "BX" cable? - Answer- Armored cable.
What are the rules for AC (BX) cable? - Answer- - Dry locations only.
- Anti-short bushings (redheads) required.
What does MC cable stand for? - Answer- Metal clad.
What are the rules for MC cable installation? - Answer- - Supports 6' or less apart and
less than 12" from box.
- Secure to boxes & cabinets w/ fittings listed for MC.
Any openings to conduit systems must remain what? - Answer- Must remain accessible.
No __________ ___________ ___________ w/ metal raceways. - Answer- Common
plastic boxes.
No splices in small or radius conduit raceways. - Answer- FYI.
, What is the max degree of turn between pull stations in raceways? - Answer- 360
degrees max.
Is an underground raceway considered a wet or dry location? - Answer- Wet location.
Is the interior of above ground raceways considered wet or dry locations? - Answer-
Wet locations.
When talking about per percentage of conduit/tubing that wiring can fill up, what is the
max allowed when 2 or more conductors is used? - Answer- Max of 40% filled.
What are the most common types of raceway conduit? - Answer- - Electrical Metal
Tubing (EMT) (thinwall)
- Flexible Metal Conduit (FMC) (greenfield/flex)
- Liquidtight Flexible Metal Conduit (LFMC) (Sealtight)
- Rigid PVC (Sched 80 only)
What is the min service amperage for a single family dwelling? - Answer- 100A
All other services, min 60A.
How many services allowed per dwelling? - Answer- One
All underground raceways must be sealed when what? - Answer- When they enter the
main panel.
What is a warning ribbon and where should it be? - Answer- It is an identifier for the
service lateral.
It must be buried 12" or more above service conductors.
What wires are allowed on the service mast? - Answer- Only conductors. No CATV or
phone lines.
No unsupported couplings above the roof. - Answer- FYI
Conduit hubs must be identified for use w/ service equipment. - Answer- FYI
What kind of pipe is required for service entrance/laterals? - Answer- Must be metal
pipe; plumbing pipe or fittings are prohibited.
How far out from the service box must the conduit be secured? - Answer- 3'
Is the meter base alone considered service equipment? - Answer- No. Not by itself.
Where should the service disconnect be? - Answer- Readily accessible. Must be inside
or outside nearest point of entrance of service conductors.
