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Federal Pacific 2115B NES - 15A 1 Pole Molded Case Circuit Breaker
- 15A
- 1 Pole
- Plug-On
Federal Pacific
2115B
NES - 15A 1 Pole Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
2115B
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Federal Pacific NES2115B - 15A 1 Pole Molded Case Circuit Breaker
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Description
Delivering 14kAIC interrupt capacity at 120VAC, the 2115B is a robust N-frame molded case breaker designed for older electrical systems. It mounts into vintage Federal Pacific Stab-Lok load centers to restore branch circuit functionality without panel modifications. As a legacy NES series component, it features non-interchangeable fixed thermal-magnetic trip elements and accepts 14-10 AWG wire. For modern upgrades, this exact-fit unit can be substituted with the UBIF015N replacement model.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | 2115B |
| Series | NES |
| Amperage | 15A |
| Poles | 1 |
| Mounting Style | Plug-On |
| Voltage | 120VAC, 125VDC |
| Phase | 1 |
| AIC Rating | 14kA @ 120VAC, 5kA @ 125VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific Stab-Lok Load Centers |
| Wire Gauge | 14-10 AWG |
| Max Wire | 10 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489, NEMA AB 1 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
Product FAQs
8 answersWhat panelboards are compatible with the NES2115B circuit breaker?
This legacy N-Frame breaker is designed to plug directly into vintage Federal Pacific Stab-Lok load centers and NE-S frame panelboards without requiring any structural modifications to the enclosure.
Are there modern aftermarket replacements available for the 2115B?
Yes. While the NES2115B is often cross-referenced with the standard NES2115, modern exact-fit substitutes are available. The Connecticut Electric UBIF015N is a widely accepted aftermarket replacement for 15A single-pole Stab-Lok applications.
Can the NES2115B be utilized in direct current applications?
Yes. Alongside its standard alternating current applications, this breaker is rated for 125VDC systems, where it delivers a 5kA interrupting capacity.
How is the trip unit configured on this specific NES series breaker?
It is equipped with a non-interchangeable thermal-magnetic trip unit. The Long-Time and Instantaneous (LI) trip functions are factory-set with fixed thermal and fixed magnetic parameters, meaning they cannot be field-adjusted.
What are the wire size limits for the load side terminals?
The integrated load side lugs are designed to accommodate wire gauges ranging from a minimum of 14 AWG up to a maximum of 10 AWG. Ensure proper torque specifications are followed during installation to maintain a secure connection.
What safety precautions should be taken when servicing Federal Pacific Stab-Lok panels?
Legacy Federal Pacific equipment is obsolete. A licensed electrician must thoroughly inspect the panel's busbar for pitting, corrosion, or arc damage before installing a replacement breaker to ensure the system remains safe for continued operation.
Does the NES2115B require bolted connections to the busbar?
No. This is a plug-on breaker that snaps directly onto the busbar of compatible Stab-Lok or NE-S frame load centers, eliminating the need for bolted bus connections.
What is the maximum fault current this breaker can safely interrupt on AC systems?
The NES2115B carries a 14kAIC rating at 120VAC. Electricians must verify that the available fault current at the panel does not exceed 14,000 amps to maintain compliance with UL 489 standards.
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