A GFCI circuit breaker, also known as a GFCI breaker, is a type of circuit breaker that provides Ground Fault Circuit Interrupter (GFCI) protection. It is often used as a replacement for standard circuit breakers and protects all receptacles on that individual circuit.
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In a three-pole, 4-wires configuration, the following 30A-125//250V (NEMA 14-30) receptacle is wired and protected using 30A – 240V GFCI breaker. The following wiring diagram shows a hot water tub spa or whirlpool spa wired and protected through a 2-pole GFCI circuit breaker using a three-wire system (two hot wires, one neutral, and one ground).
Similar to the wiring diagram for a 1-pole GFCI circuit breaker, the built-in white wire on the back of the two-pole GFCI must be connected to the neutral bar in the main panel. The 2-pole GFCI should be installed in the two hot slots in the main panel. This configuration allows HOT 1 and HOT 2 to provide the 240V input supply to the GFCI.
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