NHIE Electrical Part 2 Questions and
Answers
What is Alternating Current (AC)? - Answer-Used in homes
What is Voltage? - Answer-Potential energy of electrical system
What is the voltage of modern homes? - Answer-120/240 volts
What is Current? - Answer-Measurement of flow of electricity
What i...
At what current will a GFCI trip? - Answer✔✔-5 milliamps
What should be done with worn or frayed overhead service wires? - Answer✔✔-Replace them
What is the minimum depth for underground (Lateral) service wires under normal landscaped
areas? - Answer✔✔-24 inches
What is the minimum depth for underground (Lateral) service wires under driveways or parking
areas? - Answer✔✔-36 inches
What is the minimum service required by HUD/FHA and all newer built homes? - Answer✔✔-
100 amp service
When might a 60 amp service need to be upgraded? - Answer✔✔-If someone adds a central air
conditioner, electric dryer, etc.
Why do utility companies seal service boxes? - Answer✔✔-Safety and to prevent electricity
theft.
Can an inspector open a service box? - Answer✔✔-No.
Should the two main fuses be the same size? - Answer✔✔-Yes.
What can make a system ground ineffective? - Answer✔✔-Loose connections, corrosion,
splices, downstream of water meter, plastic pipe.
How can a ground attached downstream of a water meter be improved? - Answer✔✔-Attach
upstream or add a jumper wire.
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