FusesCurrent LimitingLow-Voltage, Low Current FusesCircuit BreakersCircuit Breaker RatingsSingle-Pole, Double-Pole, and Three-Pole Circuit BreakersThermal Circuit BreakersMagnetic Circuit BreakersResidual Current DevicesGround Fault Circuit InterruptersClass A GFCIsClass C, D, and E GFCIsUnderstanding Overcurrent Protection