Question

 What is used to open&close a circuit?

Answer A switch opens or closes a circuit. The switch is a piece of wire. When the switch is open, there isn't a loop (circuit) and electrical energy won't move through the circuit.
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Top Q&A For: What is used to open&close a circuit

How to Determine when to Use Arc Fault Circuit Interrupters (Af Circuit Breakers)?

AFCI or "Arc Fault Circuit Interrupters" are the latest in electrical safety devices for dwellings. AFCI standards were introduced in the 1999 NEC (National Electrical Code) and are required in new... Read More »
http://www.wikihow.com/Determine-when-to-Use-Arc-Fault-Circuit-Interrupters-%28Af-Circu...

How many circuit breakers are in a circuit breaker panel?

The number of circuit breakers in a circuit breaker panel is determined by the expected need of all appliances and outlets in the house. It is recommended that more breakers be installed than you'... Read More »
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What is wrong if you shut off the electricity at the circuit box and had to shut off a few to find the right circuit to change a fixture and now your pool lights and kitchen ceiling fan do not work?

Sometimes when you shut down a circuit breaker it doesn't go all the way back to the on position. Try shutting them off again, making sure they go fully to the off position then flip them on making... Read More »
http://wiki.answers.com/Q/What_is_wrong_if_you_shut_off_the_electricity_at_the_circuit_...

You plug a vacuum cleaner into a 110-V outlet with nothing else on the circuit If the 15-A circuit breaker is tripped. what is the maximum possible resistance of the vacuum's motor?


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