Federal Pacific NFS320 Molded Case Circuit Breaker
- 20A
- 3 Pole
- Plug-On
Federal Pacific
NFS320
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
NFS320
Quantity
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Federal Pacific NFS320 - 20A 3 Pole Molded Case Circuit Breaker
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Description
Built for commercial and industrial applications, the Federal Pacific NFS320 is a 20A molded case circuit breaker from the legacy N-Frame series. It utilizes a thermal-magnetic trip unit to deliver reliable overcurrent protection. Engineered for discontinued Federal Pacific NFS panelboards, this three-pole breaker provides a seamless stab-in mounting solution. It acts as an exact substitute for the FPE20-3. Rated at 18kAIC at 240VAC, this HACR-rated breaker handles standard loads safely.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NFS320-R |
| Series | NFS |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 18kA @ 240VAC |
| Frame Type | NFS |
|---|---|
| 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
8 answersWhich panelboards are compatible with the NFS320 circuit breaker?
This breaker is designed exclusively for legacy Federal Pacific NFS panelboards. It uses a plug-in connection to integrate directly into these specific enclosures.
Is the NFS320 a 2-pole or 3-pole circuit breaker?
The NFS320 is a 3-pole circuit breaker designed for 3-phase systems. The number 3 in the catalog number indicates its 3-pole configuration, resolving any confusion from conflicting documentation.
How is the NFS320 installed into the panelboard?
It utilizes a plug-in mounting mechanism that allows it to connect directly to the busbar of compatible Federal Pacific NFS panelboards without requiring additional mounting hardware.
What wire sizes do the lugs on the NFS320 accept?
The factory-installed load lugs on this breaker accommodate wiring ranging from 12 AWG to 10 AWG. Ensure you use the correct wire gauge to maintain a safe and compliant connection.
Are Federal Pacific NFS320 breakers still being manufactured?
No, Federal Pacific Electric is no longer in business. The NFS320 is a legacy component used to maintain existing electrical infrastructure without requiring a complete panelboard upgrade.
What type of protection does the LI trip unit provide?
The fixed thermal magnetic trip unit includes long-time (L) and instantaneous (I) functions. The long-time function protects against sustained overloads, while the instantaneous function protects against sudden short circuits.
What does the 18kAIC rating on the NFS320 indicate?
This rating means the breaker can safely interrupt a maximum fault current of 18,000 amps at 240V. You must verify that the available fault current at your panel does not exceed this limit to ensure safe operation.
Is the NFS320 part of the FPE Stab-Lok residential line?
No. The NFS320 is an N-Frame molded case circuit breaker built for commercial panelboards. It does not use the residential Stab-Lok design that is frequently associated with safety hazards.
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