Federal Pacific Electric NB320 U Circuit Breaker

The Federal Pacific Electric NB320 U is a 20-amp, three-pole, 240-volt circuit breaker designed to interrupt current in overcurrent events on 240V systems. This NB320 U model provides protective disconnect for three hot conductors, helping prevent damage from overloads or short circuits and reducing electrical hazards associated with overcurrent conditions. With a 20A rating, normal operating currents should stay below the trip threshold, ensuring continuous service for properly sized branch circuits. The three-pole configuration makes it suitable for 240V applications that require simultaneous disconnection of all three live conductors, such as certain 240V equipment or multi-wire branch circuits. The NB320 U designation identifies the specific Federal Pacific Electric breaker family and rating, enabling technicians to match the device to installations that call for this model. In practice, selecting the NB320 U ensures you have a dedicated protective device for a 240V, three-conductor circuit at the 20-amp level, supporting safe operation and fault isolation in electrical distribution.