Circuit Breaker Fuse
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What is the function of a fuse or circuit breaker? A ground wire?
What is the function of a fuse or circuit breaker?
What is the function of a ground wire?
Explain
A fuse or breaker is a safety device designed to limit the amount of current that can flow in a circuit. Its size is based on the size of the wire conducting the current. ie 15 amp #14 wire, 20 amp #12 wire. If you get a short circuit in and appliance or accidentally short a hot wire to ground then the breaker will open. Also if you overload a circuit beyond the wire's capacity to safely conduct the current, then the breaker will open before the wire heats up to a dangerous level. The ground wire is a safety device designed to short accidentally applied voltage to the electrical service ground and blow the breaker instead of having the exposed metal parts of the appliance or switch at line voltage (ie 120 volts)
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