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Federal Pacific NES2120B Molded Case Circuit Breaker
- 20A
- 1 Pole
- Plug-On
Federal Pacific
NES2120B
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
NES2120B
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Federal Pacific NES2120B - 20A 1 Pole Molded Case Circuit Breaker
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Description
Part of the legacy N-Frame family, the NES2120B is a 20-amp, single-pole molded case circuit breaker by Federal Pacific. It is tailored for commercial facilities that require exact replacement parts to keep aging electrical systems operational. Designed to plug into Federal Pacific NE-S frame panelboards, it eliminates the need for retrofit adapters. This reverse-feed capable unit can be replaced by the standard NES2120.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NES2120B-R |
| Series | NES |
| Amperage | 20A |
| 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 NE-S Frame Panelboards |
| 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, Undervoltage Release, Auxiliary Switch, Bell Alarm, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489, NEMA AB-1 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Reverse Feed |
Product FAQs
6 answersWhich panelboards accept the Federal Pacific NES2120B?
This breaker is specifically engineered for use in legacy Federal Pacific NE-S frame panelboards. It mounts directly into existing enclosures without requiring aftermarket retrofit adapters.
Can I use a standard NES2120 in place of the NES2120B?
Yes, the NES2120B is a reverse-feed capable unit that can typically be replaced by the standard Federal Pacific NES2120 molded case circuit breaker.
What does the LI trip function code indicate on this breaker?
The LI designation means the thermal-magnetic trip unit provides both Long-Time overload protection and Instantaneous short-circuit protection. Both the thermal and magnetic trip elements are fixed and non-adjustable.
Does the NES2120B require bolted connections to the busbar?
No, this N-Frame breaker features a plug-in connection type. It is designed to stab directly into the busbar of compatible NE-S frame panelboards for a secure installation.
What wire sizes are accepted by the terminals on the NES2120B?
The load-side lugs on this breaker are designed to accommodate wire gauges ranging from 14 AWG to 10 AWG.
Is the NES2120B rated for direct current (DC) systems?
Yes, this breaker can be applied in DC systems. It carries an interrupting rating of 5kA at 125VDC, in addition to its standard alternating current ratings.
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