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Connecticut Electric UBIF020N 20 Amp Circuit Breaker for Level 1 EV Charging

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9.1
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The Connecticut Electric UBIF020N is a 20A, 1-pole, plug-in replacement breaker for Federal Pacific Stab-Lok NC panels. The circuit breaker is ETL listed to UL 489, it offers 10,000 AIC protection and reliable performance for 120V circuits. Ideal for 15A and 16A Level 1 EV charger installations using a NEMA 5-15 outlet.

The Connecticut Electric UBIF020N 20 Amp Circuit Breaker is a plug-in replacement specifically designed for use in Federal Pacific Stab-Lok panels that accept NC-style thin breakers. If you’re installing a 15A or 16A Level 1 EV charger or setting up circuits for 3.8kW chargers, this breaker is an excellent choice.

As a certified EV charger installer, I’ve worked with older Federal Pacific load centers, and I’m always cautious about using reliable, modern breakers in these systems. The UBIF020N fits perfectly in these panels, offering a plug-in design that makes installation quick and easy. There’s no need for panel upgrades or any extra mounting hardware or modifications, and the breaker securely snaps into place, ensuring a stable connection that minimizes the risk of voltage drops or electrical faults.

This breaker features a 10,000 AIC interrupting capacity, which is essential when handling EV charger circuits that may experience fault conditions. The 20A rating is more than enough to support the 15A or 16A EV charger delivering up to 3.84 kW, and the ETL listing to UL 489 assures you that it meets safety standards for both the US and Canada. Whether you’re working on a retrofit or a new installation of a 3.84 kW EV charger, the UBIF020N provides peace of mind with its durability and performance.

I’ve personally tested it with the Lectron 120V Level 1 J1772 EV Charger, using a NEMA 5-15 outlet, and found it performed flawlessly. Even with the NEMA 5-15 plug-in EV charger running at full load for an extended period of charging 40+ hours, the dedicated EV circuit breaker didn’t trip, overheat, or show any signs of voltage drops.

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Lectron Electric Vehicle Charger 16 Amp - Level 1 EV Charger (110V) with 21ft Extension Cord & Nema 5-15 Plug Compatible with All J1772 EVs
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The Lectron 16 Amp Level 1 EV Charger offers convenient 110V charging with a 21ft extension cord and NEMA 5-15 plug. Compatible with all J1772-equipped electric vehicles, this reliable charger provides a cost-effective solution for home use, ensuring smooth, hassle-free charging with safety and versatility for daily needs.

I wired this breaker to protect the Level 1 EV charging circuit and support a NEMA 5-15R outlet for the 120V 15A Lectron Level 1 J1772 EV Charger. The circuit was installed using 12 AWG solid copper THHN wire (L1, N & G)  in a ½-inch conduit, with grounding run to the panel’s bonded ground/neutral busbar, as shown in the wiring diagram below:The electrical wiring diagram titled "16A EV Charger Wiring Diagram with UBIF020N Breaker" shows how to install a 15/16A Level 1 EV charger using a 20A Stab-Lok breaker in a Federal Pacific panel, following the US National Electrical Code (NEC). It starts with utility power entering the panel through L1 (black), L2 (red), and Neutral (white) wires connected to the main lugs. A warning highlights that these lugs are always energized. Inside the panel, the main breaker controls power to the system. The neutral and ground busbars are visible, with a bonding connection that ensures safe grounding throughout the panel. The dedicated EV charger circuit uses a 20A 1-pole UBIF020N breaker (labeled CB1), which complies with the NEC 80% rule for continuous loads. This allows safe operation of 15A and 16A EV chargers. The EV charger wiring uses 12 AWG copper rated for 90°C. A black hot wire (L1) runs from the breaker, a white neutral wire connects to the busbar, and a green ground wire connects to the ground bar. These run in a ½-inch PVC conduit to a yellow NEMA 5-15 outlet. The grounding system includes a conductor from the ground busbar to an external ground rod. This ensures safe current dissipation during fault conditions. The circuit ends at a NEMA 5-15 outlet, where a Level 1 EV charger rated for 3.8kW (15/16A at 120V) is plugged in. The diagram includes icons for safety notes, installation tips, and the “Electric Vehicle Geek” logo.

During testing, the entire circuit, including the breaker, remained cool and stable through several test runs, which included 40+ hours of trickle charging sessions in a warm environment. There were no signs of stress, overheating, or breaker trips, further confirming the breaker’s reliability in handling Level 1 charging applications.

I’ve used this breaker in multiple installations, including low-power circuits for Level 1 EV chargers like the Lectron 120V 15A charger, and it consistently delivers solid performance. The UBIF020N is an ideal solution for those needing to replace older breakers in Federal Pacific Stab-Lok panels and ensures that your electrical system is up to code, safe, and reliable for all your EV charging needs.

9.1Expert Score
If you’re upgrading an old Federal Pacific panel to accommodate a 15A or 16A Level 1 EV charger or small EV charging accessory such as a smart meter, the Connecticut Electric UBIF020N is a high-quality, modern 20A breaker that guarantees safe and reliable operation without the hassle of modifying your existing load center.
Features
9
Real World Usage
9.5
Materials
9
Durability
9
Craftsmanship
9
Design
9
Monetary Value
9
Product Value
9
Brand Reputation
8.5
Expert Valuation
9.5
PROS
  • Easy plug-in installation
  • Compatible with Federal Pacific Stab-Lok panels
  • ETL listed to UL 489 (US & Canada)
  • Reliable performance under load
  • 10,000 AIC fault protection
  • Fits without modification
  • Ideal for 15A and 16A Level 1 EV chargers
CONS
  • Only rated for 120V circuits
  • Not suitable for high-amperage EV chargers
  • Limited to older panels that accept NC-style thin breakers
  • Thin body may feel flimsy to some installers

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