NHIE Electrical Part 3 Questions and
Answers
Do you need a jumper wire if the ground connection is downstream of the water meter? -
Answer-Yes, a jumper wire is required around the water meter.
What are Ufer grounds? - Answer-Long copper wire or rod buried in a concrete footing.
What gauge cop...
How are 240 volt appliances connected to the circuit breaker panel? - Answer✔✔-They use two
breakers connected together.
Does a sub panel increase the service size? - Answer✔✔-No, it only increases the number of
circuits.
What color are hot wires? - Answer✔✔-Black and red.
What color are neutral wires? - Answer✔✔-White.
What color are ground wires? - Answer✔✔-Bare.
What is a typical 120 volt branch circuit composed of? - Answer✔✔-One black wire, one white
wire, and one bare ground wire.
What are some materials that have been used for sheathing? - Answer✔✔-Cloth, paper, rubber,
metal, or plastic.
Do black and white wires carry the same number of amps? - Answer✔✔-Yes, any imbalance
indicates a problem.
When was grounding first introduced in residential wiring? - Answer✔✔-In the late 1950s.
When was knob and tube wiring used until? - Answer✔✔-Approximately 1950.
Did knob and tube wiring use junction boxes? - Answer✔✔-No, connections were made by
twisting, soldering, and taping the joints.
What should a service lateral be in? - Answer✔✔-A rigid conduit.
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