Federal Pacific NJJ221600 Molded Case Circuit Breaker
- 600A
- 2 Pole
- Bolt-On
Quantity
Federal Pacific NJJ221600 - 600A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
The NJJ221600 is a legacy molded case circuit breaker manufactured by Federal Pacific for commercial and industrial applications. As part of the N-frame family, it delivers 600A of reliable thermal-magnetic protection for heavy-duty electrical systems. Designed for exact compatibility, this unit installs into Federal Pacific distribution panels and switchboards. It provides a seamless bolt-on fit, allowing facility managers to maintain existing infrastructure. Rated at 22 kAIC at 240VAC.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NJJ221600 |
| Series | NJJ |
| Amperage | 600A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 22kA @ 240VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific Distribution Panels, Switchboards |
| Wire Gauge | (2) 3/0 AWG - 500 kcmil |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 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 |
|---|---|
| Accessories | Load Lugs |
| Standards | UL 489, NEMA AB-1 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
Product FAQs
6 answersWhich panelboards accept the Federal Pacific NJJ221600 circuit breaker?
This N-Frame breaker is designed for installation in legacy Federal Pacific (FPE) distribution panels and switchboards configured for bolt-on molded case circuit breakers. Verify your busbar configuration matches the N-Frame footprint before installation.
What is the lug capacity for the NJJ221600 breaker?
The terminal lugs accommodate two conductors per pole, accepting wire sizes from 3/0 AWG up to 500 kcmil. This dual-wire capacity allows for parallel conductor runs, which is standard practice for managing 600A loads.
Is the NJJ221600 suitable for direct current (DC) systems?
Yes, in addition to its standard AC ratings, this breaker is rated for 250V DC applications with a 10kA interrupting capacity. It can be utilized in compatible DC distribution panels or switchboards.
Are the trip settings on the NJJ221600 adjustable?
No, this breaker features fixed thermal and fixed magnetic trip elements. It provides standard long-time and instantaneous (LI) protection without the ability to adjust the trip curve in the field.
Is the Federal Pacific NJJ221600 still in active production?
Federal Pacific Electric (FPE) is a legacy brand and no longer manufactures new circuit breakers. The NJJ221600 is sourced to maintain and service existing FPE switchboards without requiring a complete system retrofit.
What type of protection does the LI trip function provide on this breaker?
The LI designation indicates thermal-magnetic protection with Long-Time (L) and Instantaneous (I) functions. The thermal element protects against sustained overloads, while the magnetic element trips immediately during short-circuit fault conditions.
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