Federal Pacific / AmericanNEF431100
Federal Pacific NEG631100 Molded Case Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Federal Pacific
NEG631100
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
NEG631100
Quantity
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Federal Pacific NEG631100 - 100A 3 Pole Molded Case Circuit Breaker
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Description
Maintaining legacy infrastructure is simplified with this 100-amp, three-phase molded case breaker from Federal Pacific. It serves as a seamless substitute for NEF431100 units, bolting securely into N-frame compatible FPE panelboards and switchboards. The non-interchangeable thermal-magnetic trip unit ensures consistent LI protection, handling fault currents up to 18kA at 240V or 14kA at 480V without requiring panel modifications.Specifications
| Brand | Federal Pacific |
|---|---|
| Series | NEG |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC |
| Frame Type | NEG |
|---|---|
| Terminal Type | Lugs |
| For Use With | Federal Pacific Panelboards, Federal Pacific Switchboards |
| Wire Gauge | 14-1/0 AWG |
| Max Wire | 1/0 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, Auxiliary Switch, Undervoltage Release, Bell Alarm |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip, Reverse Feed |
Product FAQs
6 answersWhat equipment is the Federal Pacific NEG631100 circuit breaker designed to fit?
This molded case circuit breaker is designed for use in legacy Federal Pacific panelboards and switchboards that accept N-Frame breakers.
What does the LI trip function on the NEG631100 indicate?
The LI designation means this thermal magnetic breaker includes both Long-Time and Instantaneous trip functions. The long-time thermal element protects against sustained overloads, while the instantaneous magnetic element provides immediate tripping during severe short circuits. Both settings are fixed on this model.
What wire sizes are compatible with the lugs on the NEG631100?
The factory lugs accept wire gauges ranging from 14 AWG up to 1/0 AWG. Ensure you torque the connections to the manufacturer specifications during installation to prevent overheating.
How does the NEG631100 mount into the panel?
It features a bolt-on connection type, meaning it must be physically bolted to the busbars in a compatible Federal Pacific panelboard or switchboard. This provides a secure, vibration-resistant connection compared to plug-on designs.
Are there any safety considerations when replacing a legacy Federal Pacific breaker like the NEG631100?
When installing replacement breakers in legacy Federal Pacific equipment, always verify the busbars are free of pitting or corrosion. Because FPE is a legacy brand, ensure the panel itself has been inspected by a licensed electrician for overall safety and integrity before adding or replacing breakers.
Is the Federal Pacific NEG631100 still manufactured today?
Federal Pacific Electric is a legacy brand and the original NEG631100 is no longer in active production. Replacements are typically sourced to maintain existing switchboards and panelboards without requiring a full system retrofit.
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