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Federal Pacific NFS4320 Molded Case Circuit Breaker
- 20A
- 3 Pole
- Plug-On
Federal Pacific
NFS4320
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
NFS4320
Quantity
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Federal Pacific NFS4320 - 20A 3 Pole Molded Case Circuit Breaker
Re-Certified
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Description
Built for legacy commercial and industrial applications, the Federal Pacific NFS4320 is a three-pole, 20-amp molded case circuit breaker. It serves as a crucial replacement component for facilities still operating with original FPE infrastructure. This N-Frame breaker utilizes a stab-in mounting mechanism, allowing it to integrate seamlessly into Federal Pacific NFS panelboards.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NFS4320-R |
| Series | NFS |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 600VAC |
| Phase | 3 |
| AIC Rating | 18kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific NFS Panelboards |
| Wire Gauge | 12-10 AWG |
| Max Wire | 10 AWG |
| Min Wire | 12 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 |
| Standards | UL 489, NEMA AB-1 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
Product FAQs
5 answersWhich panelboards accept the Federal Pacific NFS4320 circuit breaker?
This 3-pole breaker is engineered specifically for use in legacy Federal Pacific NFS series panelboards.
What wire gauge range is supported by the NFS4320 terminals?
The factory-installed load side lugs accommodate wire sizes ranging from 12 AWG to 10 AWG.
How does the thermal-magnetic trip mechanism function on this breaker?
The fixed thermal-magnetic unit provides LI protection, meaning it delivers long-time delay for standard overloads and an instantaneous trip response for short circuits.
Can this breaker be used to maintain existing FPE infrastructure?
Yes, this N-frame device provides an exact fit for classic Federal Pacific NFS enclosures, allowing facilities to replace faulty breakers without a complete panelboard overhaul.
How does this N-frame breaker connect to the panel bus?
It utilizes a stab-in mounting mechanism for seamless integration into compatible Federal Pacific NFS panelboards.
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