Federal Pacific NJJ232400 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Bolt-On
Quantity
Federal Pacific NJJ232400 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Maintaining older electrical systems requires exact-fit components, and the Federal Pacific NJJ232400 delivers seamless integration into existing FPE distribution panels. This 400-amp, 3-pole bolt-on breaker eliminates the need for retrofit adapters, providing a straightforward solution for facility managers. It offers a 22kAIC rating at 240VAC and utilizes a fixed thermal-magnetic trip mechanism. This unit serves as a substitute for the NJL631400 in commercial and industrial setups.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NJJ232400 |
| Series | NJJ |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 22kA @ 240VAC, 10kA @ 250VDC |
| Frame Type | NJJ |
|---|---|
| Terminal Type | Lugs |
| For Use With | Federal Pacific Distribution Panels, Switchboards |
| Wire Gauge | (2) 3/0 AWG - 250 kcmil |
| Max Wire | 250 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 Side Lugs Included |
| Standards | UL 489, NEMA AB-1 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
Product FAQs
6 answersWhat panels are compatible with the Federal Pacific NJJ232400 circuit breaker?
This bolt-on molded case circuit breaker is designed specifically for legacy Federal Pacific (FPE) distribution panels and switchboards configured for N-Frame components.
What are the acceptable wire sizes for the NJJ232400 lugs?
The terminal lugs accommodate dual conductors ranging from 3/0 AWG to 250 kcmil. Always verify that the wire material and insulation rating align with your specific application and local electrical codes.
Can the trip curve be adjusted on the NJJ232400?
No, this breaker utilizes a fixed thermal and fixed magnetic trip unit. The long-time and instantaneous (LI) trip functions are factory-set and cannot be adjusted in the field.
Is the NJJ232400 suitable for direct current (DC) applications?
Yes, this breaker is rated for use in 250VDC systems with an interrupting capacity of 10kA. Verify that your specific DC panel or switchboard is designed to accept FPE N-Frame bolt-on breakers.
Is the Federal Pacific NJJ232400 still in active production?
Federal Pacific Electric (FPE) is no longer manufacturing new equipment. The NJJ232400 is a legacy component used primarily to maintain and service existing FPE switchboards and distribution panels without requiring a complete system retrofit.
What precautions should be taken when installing this legacy FPE breaker?
Installation must be performed by a qualified electrician. Before bolting the breaker into an existing Federal Pacific panel, thoroughly inspect the bus connections and mounting hardware for signs of wear, pitting, or thermal damage to ensure a secure and safe connection.
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