Connecticut Electric UBIF220N 20 Amp Circuit Breaker for Level 2 EV Charging

The Connecticut Electric UBIF220N 20 Amp Circuit Breaker is a plug-in replacement specifically designed for Federal Pacific Stab-Lok panels that accept NA-style thick breakers. It’s an excellent option for 240V Level 2 EV chargers – especially 16A models, or when using amperage-adjusted Level 2 EV chargers set to 16A in panels with limited capacity. If you need a safe, code-compliant way to install a 16A Level 2 EV charger without upgrading or replacing an old Federal Pacific Stab-Lok panel, this breaker gets the job done.

As an EV charger installer, I frequently retrofit older Federal Pacific load centers which pose a challenge when installing EV chargers. When working with Level 2 chargers, it’s essential to use modern, reliable, and compatible breakers like the UBIF220N. It fits securely into Stab-Lok panels without requiring modifications or extra hardware. The plug-in design ensures a solid connection that reduces the risk of voltage drops or EV charging faults.

With a 10,000 AIC interrupting capacity, the UBIF220N is built to safely handle fault conditions on EV circuits. The 20A rating is ideal for supporting continuous loads from 240V 16A Level 2 chargers. And since the circuit breaker is ETL listed to UL 489 standards for both the U.S. and Canada, it meets all necessary safety requirements for residential EV installations.

I tested this breaker with the SEGUMA 240V 16A Level 1/2 EV Charger, plugged into a NEMA 6-20 outlet. I wired the circuit using 12 AWG copper THHN in a ½-inch PVC conduit and grounded it to the panel’s bonded neutral/ground busbar.

The system performed flawlessly with a 3.8Kw EV charger across multiple charging sessions, with no 20A EV charger breaker tripping, overheating, or voltage instability – even under continuous 16A loads for an extended period. If you’re upgrading an older panel for EV charging or installing a 16A adjusted Level 2 charger, the UBIF220N offers a dependable and code-compliant solution that won’t require expensive service upgrades.