Federal Pacific NA245 Miniature Circuit Breaker

No, the NA245 features a proprietary Stab-Lok connection and is exclusively compatible with Federal Pacific Electric (FPE) Stab-Lok load centers. It will not fit in panels from other manufacturers.

The NA245 is a full-size thick breaker measuring 1 inch per pole, requiring 2 inches of total panel space for this 2-pole unit. The NC245 is a thin or half-size breaker measuring 1/2 inch per pole, designed to save space in crowded Stab-Lok panels.

No, the NA245 is a plug-on breaker that utilizes the FPE Stab-Lok connection system. It pushes directly into the busbar and does not use a bolt-on mechanism, unlike the Federal Pacific NB series.

The breaker lugs accept 14 to 2 AWG wire. For a 45-amp circuit, electricians typically use 8 AWG or 6 AWG copper wire, depending on the insulation temperature rating, circuit length, and local NEC requirements.

The thermal component provides a delayed trip (Long-Time) to prevent nuisance tripping from temporary overloads, while the magnetic component provides an immediate trip (Instantaneous) to quickly clear severe short circuits.

No, the NA245 is rated for a maximum of 120/240VAC with a 10kAIC interrupting capacity. It is suitable only for standard residential or light commercial single-phase systems.

Original FPE Stab-Lok breakers have a documented history of high failure rates, often failing to trip during overcurrent or short-circuit events. Due to these safety hazards, many electricians recommend upgrading the entire panel or installing modern ETL-listed replacement breakers.

Connecticut Electric produces the UBI series, which are newly manufactured, ETL-listed aftermarket replacements designed to safely fit existing Federal Pacific Stab-Lok load centers.