Connecticut Electric UBIF240N 40 Amp Circuit Breaker for Level 2 EV Charging
The Connecticut Electric UBIF240N 40A two-pole circuit breaker is ETL-listed for safe, code-compliant replacement in Federal Pacific Stab-Lok NA panels—ideal for protecting 240V 32A Level 2 EV chargers.
The Connecticut Electric UBIF240N 40 Amp, 120/240 VAC, 2-Pole circuit breaker directly replaces Federal Pacific Stab-Lok panels that accept NA-style (thick) breakers. It’s an ideal option for homeowners or electricians looking to safely replace older breakers in their load centers to install 32A EV chargers – or amperage-adjusted Level 2 EV chargers to 32A. With its ETL Listing to UL Standard 489, this breaker is certified for use in both the U.S. and Canada, ensuring it meets the highest safety standards.
As an EV charger installer, I’ve worked on numerous retrofit EV charger installation projects involving Federal Pacific panels. The biggest challenge with these panels is finding reliable and code-compliant breakers that fit properly. The Connecticut Electric UBIF240N solves this problem, fitting seamlessly into Federal Pacific Stab-Lok panels that accept NA-style (thick) breakers without requiring any modifications or panel upgrades. Its plug-in design provides a solid connection, ensuring no issues with EV charger voltage drops or EV charging electrical faults.
With a 10,000 AIC interrupting capacity, the Connecticut Electric UBIF240N is built to handle fault conditions, offering robust protection for the EV charging circuit. Its 40 Amp rating is ideal for supporting continuous 240V 32A Level 2 EV chargers delivering 7.7 kW of power, where NEC 80% rules require a 40A breaker to safely supply a 32A continuous load.
We tested the circuit breaker on a JuiceBox 32 Amp EV Charger connected to the Federal Pacific Stab-Lok panel.
The JuiceBox 32 Amp EV charger circuit was plugged into a NEMA 14-50 outlet which was wired using 8 AWG copper THHN in ¾-inch PVC conduit, and the outlet was grounded to the panel’s bonded neutral/ground busbar as shown in the wiring diagram below:
The Connecticut Electric UBIF240N breaker handled the 32A EV charger continuously load effortlessly, showing no signs of dedicated EV charger circuit breaker tripping, overheating, or voltage instability, even during extended charging sessions.
This setup is an excellent example of how to safely and effectively integrate a 240V 32A Level 2 EV charger into an older Federal Pacific load center without requiring a costly panel replacement. The NA-style thick body fits securely into the Federal Pacific Stab-Lok panel, and the installation process is quick and straightforward.
If you’re retrofitting an older Federal Pacific panel that accepts NA-style (thick) breakers – or replacing a worn-out breaker for a 32A EV charger – the Connecticut Electric UBIF240N 40A circuit breaker is a dependable, code-compliant solution that won’t disappoint.
Recommended 32A Level 2 EV Chargers for UBIF240N Breaker
Here’s a list of top-rated 32A Level 2 EV chargers that pair well with the Connecticut Electric UBIF240N breaker, ensuring safe, efficient, and NEC-compliant charging at 240V.
You can also use this circuit breaker to install Level 2 EV chargers that can be adjusted to 32 amps, making it ideal for limited-capacity panels. 32A Adjusted Level 2 EV Chargers – Full List.
There are no reviews yet.