How many conductors do GFCI breakers require?

GFCI breakers require two conductors: a hot conductor and a neutral conductor. The purpose of a GFCI (Ground Fault Circuit Interrupter) breaker is to protect against electrical shocks by detecting imbalances in the electrical current flowing through these conductors. When an imbalance occurs, indicating that current is leaking to ground, the GFCI breaker trips, cutting off the electrical supply.

Having two conductors allows the GFCI to monitor the return path of the current, which is essential for its function. It compares the current flowing to the device (through the hot conductor) with the current returning (through the neutral conductor). If the two currents are not equal, the GFCI can quickly disconnect the circuit. Thus, the requirement for two conductors is critical for the safety and efficacy of GFCI protection in residential and commercial electrical systems.

Other options, such as one, three, or four conductors, do not fulfill the standard operational needs of a GFCI breaker, which is why the correct answer is two conductors.