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- The size of the electric service is dictated by the smallest of the following three
items.
- Rating of the service cable
- Size of the main disconnect
- Rating of the panel Example: If the cable is rated 100 amps, the disconnect is 150 amps and the panel is
rated 150 amps, then the size of the electric service is 100 amps (the smallest of the
three qualifying items).
- Learn more about electrical
systems.
How does a ground fault circuit interruptor (GFCI)
work?
- A GFCI senses the balance of current in the circuit. As
long as the same amount of current that leaves the circuit breaker or supply buss returns
to the neutral, the GFCI will remain closed. If there is any current leakage in the
circuit for any reason, the GFCI will sense the difference and open the circuit. A typical
GFCI will open if there is .5 miliampere of current loss. (A miliampere is 1/1000 of an
amp.) Electricity moves at the speed of light (186,000 mps). This allows approximately
1/40,000 of a second for the GFCI to react.
- Learn more about electrical
systems.
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Inspector
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