INTERNACHI: ELECTRICAL EXAM
QUESTIONS AND ANSWERS
The following item is safe to insert into an electrical panel: _________. - Correct
Answers -None!
A live wire is sometimes called a(n) __________. - Correct Answers -ungrounded
conductor
If a service disconnect is not present at a panelboard, the panelboard is sometimes
called a _____________. - Correct Answers -"sub-panel"
Branch circuit conductors are the ____________. - Correct Answers -"wires to the
outlets"
W = E x __________. - Correct Answers -"I" (Intensity, AMPS)
For a 14-gauge copper wire, the maximum overcurrent protection rating is _____ amps.
- Correct Answers -"15"
For a 10-gauge copper wire, the maximum overcurrent protection rating is _____ amps.
- Correct Answers -"30"
Voltage is equal to ________. - Correct Answers -W/I
according to 250.56 of the NEC. If a water pipe is used for the ground and the
supplemental is a ground rod, how many additional rods should be added? - Correct
Answers -1 additoinal rod
Rods made of stainless steel and copper, or zinc-coated steel, shall be at least _____ in
diameter? - Correct Answers -5/8-inch
Grounding electordes of a pipe and conduit must be at least ____ - Correct Answers -
3/4-inch (metric 21)
In regards to special listed rods and listed rods, they may not be less than _____ in
diameter? - Correct Answers -1/2-inch
If pipe or conduit is used as a grounding electrode, it must also be no less than ____ in
length, and no smaller than trade size or ____ - Correct Answers -8 feet in length and
no smaller than 3/4-inch
, If a rod must be driven at an angle, what degree may the rod not exceed? - Correct
Answers -45 degrees off the vertical.
If a rod is buried in a trench, how deep must the trench be? - Correct Answers -At least
30 inches deep
NEC 310.15(b)(7) gives a table for sizing of conductors - Correct Answers -Service or
Feeder Rating (in amps)
100
110
125
150
200
250
400
Conductor (AWG or kcmil):
Aluminum or Copper-Clad Aluminum
#2
#1
1/0
2/0
4/0
300
600
Copper
#4
#3
#2
#1
2/0
4/0
400
List the 5 precautions for inspectors regarding Electrical inspections - Correct Answers -
1.Assess your risk tolerance.
2. Wear PPE
3. Check your surroundings
4. Use the appropriate tools.
According InterNACHI's Standards of Practice, inspectors are required to:
...test all ground-fault circuit interrupter receptacles and circuit breakers observed and
deemed to be GFCIs using a GFCI tester, where possible...
Make sure your tester is working properly before your inspection appointment. An
infrared camera is also an tool for helping to detect hot spots during the electrical
inspection.
QUESTIONS AND ANSWERS
The following item is safe to insert into an electrical panel: _________. - Correct
Answers -None!
A live wire is sometimes called a(n) __________. - Correct Answers -ungrounded
conductor
If a service disconnect is not present at a panelboard, the panelboard is sometimes
called a _____________. - Correct Answers -"sub-panel"
Branch circuit conductors are the ____________. - Correct Answers -"wires to the
outlets"
W = E x __________. - Correct Answers -"I" (Intensity, AMPS)
For a 14-gauge copper wire, the maximum overcurrent protection rating is _____ amps.
- Correct Answers -"15"
For a 10-gauge copper wire, the maximum overcurrent protection rating is _____ amps.
- Correct Answers -"30"
Voltage is equal to ________. - Correct Answers -W/I
according to 250.56 of the NEC. If a water pipe is used for the ground and the
supplemental is a ground rod, how many additional rods should be added? - Correct
Answers -1 additoinal rod
Rods made of stainless steel and copper, or zinc-coated steel, shall be at least _____ in
diameter? - Correct Answers -5/8-inch
Grounding electordes of a pipe and conduit must be at least ____ - Correct Answers -
3/4-inch (metric 21)
In regards to special listed rods and listed rods, they may not be less than _____ in
diameter? - Correct Answers -1/2-inch
If pipe or conduit is used as a grounding electrode, it must also be no less than ____ in
length, and no smaller than trade size or ____ - Correct Answers -8 feet in length and
no smaller than 3/4-inch
, If a rod must be driven at an angle, what degree may the rod not exceed? - Correct
Answers -45 degrees off the vertical.
If a rod is buried in a trench, how deep must the trench be? - Correct Answers -At least
30 inches deep
NEC 310.15(b)(7) gives a table for sizing of conductors - Correct Answers -Service or
Feeder Rating (in amps)
100
110
125
150
200
250
400
Conductor (AWG or kcmil):
Aluminum or Copper-Clad Aluminum
#2
#1
1/0
2/0
4/0
300
600
Copper
#4
#3
#2
#1
2/0
4/0
400
List the 5 precautions for inspectors regarding Electrical inspections - Correct Answers -
1.Assess your risk tolerance.
2. Wear PPE
3. Check your surroundings
4. Use the appropriate tools.
According InterNACHI's Standards of Practice, inspectors are required to:
...test all ground-fault circuit interrupter receptacles and circuit breakers observed and
deemed to be GFCIs using a GFCI tester, where possible...
Make sure your tester is working properly before your inspection appointment. An
infrared camera is also an tool for helping to detect hot spots during the electrical
inspection.
