A drop-in replacement for legacy Federal Pacific systems, the NEJ222225 is a 225A molded case circuit breaker built for commercial applications. This two-pole breaker installs into existing Federal Pacific panelboards using a secure bolt-on connection. It serves as an exact substitute for the UBIFPE225N, ensuring a precise fit. Rated at 10 kAIC at 240VAC, it features a non-interchangeable trip unit with fixed thermal-magnetic functions and load-side lugs.
What panels accept the Federal Pacific NEJ222225 breaker?
This N-Frame breaker is designed specifically for legacy Federal Pacific Electric (FPE) commercial panelboards and switchboards configured for bolt-on molded case circuit breakers. It is not compatible with residential Stab-Lok panels.
How is the NEJ222225 installed into the electrical panel?
This is a bolt-on circuit breaker, meaning the line-side connections must be securely bolted directly to the panelboard busbars. Installation requires the panel to be completely de-energized and should only be performed by a qualified electrician.
What does the LI trip function indicate on this NEJ frame breaker?
The LI designation means the breaker uses a thermal-magnetic trip unit equipped with Long-Time (L) and Instantaneous (I) protection. The thermal element provides the long-time delay for overload protection, while the magnetic element provides instantaneous tripping during short circuits.
Is the Federal Pacific NEJ222225 still in active production?
No. Federal Pacific Electric (FPE) went out of business decades ago, making original NEJ frame breakers obsolete. They are now sourced through specialized electrical distributors to help facilities maintain and service existing legacy switchgear.
Are commercial FPE breakers like the NEJ series safe to use?
The well-known safety controversies surrounding Federal Pacific primarily involve their residential Stab-Lok load centers and breakers. Commercial molded case breakers like the NEJ frame do not share that same defect history. However, due to their age, they must be properly evaluated and installed by a licensed professional.
What are the wire size requirements for the load lugs?
The standard lugs on this 225A breaker accept conductors ranging from 4 AWG to 300 kcmil. Always verify that your wire material and insulation rating align with the local electrical code for a 225-amp circuit, and torque the lugs to the manufacturer specifications.
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