Westinghouse NB31200F Circuit Breaker
- 3 Pole
- Bolt-On
Quantity
Westinghouse NB31200F 3 Pole Circuit Breaker
Re-Certified
Quantity
Description
NB31200F - Westinghouse Bolt-On Circuit Breaker
Westinghouse NB series three pole 1200 ampere bolt-on molded case circuit breaker with maximum voltage rating of 600V trip type thermal magnetic and high interrupting rating of 30 kiloampere at 480V functions long-time and instantaneous.
Specifications
| Brand | Westinghouse |
|---|---|
| Part Number | NB31200F-R |
| Series | NB |
| Poles | 3 |
| Mounting Style | Bolt-On |
Product FAQs
5 answersAre Eaton and Cutler-Hammer NB31200F breakers interchangeable with the Westinghouse model?
Yes. Eaton acquired the Westinghouse circuit breaker division and continued producing the NB series. Eaton, Cutler-Hammer, and Westinghouse breakers with the NB31200F catalog number share the same physical dimensions and electrical characteristics, making them direct replacements.
How is the NB31200F secured within a panelboard?
This is a bolt-on molded case circuit breaker. The line-side terminals must be mechanically bolted directly to the panelboard or switchboard bus, ensuring a secure, high-capacity connection suitable for 1200-amp applications.
What specific protection does the LI thermal-magnetic trip unit provide?
The LI designation indicates long-time and instantaneous trip functions. The thermal component provides a long-time delay to prevent nuisance tripping during temporary overloads, while the magnetic component provides instantaneous tripping to clear severe short circuits immediately.
Will the NB31200F fit in any 1200-amp panelboard?
No. This breaker is specifically designed for the Westinghouse, Cutler-Hammer, or Eaton NB frame footprint. You must verify that your switchboard or panelboard is configured to accept NB series bolt-on breakers before installation.
Can this breaker be applied on systems with an available fault current exceeding 30kA at 480V?
No. The maximum interrupting capacity is 30kAIC at 480V. Installing this breaker in a system where the available fault current exceeds its rated capacity is a severe safety hazard and violates National Electrical Code (NEC) requirements.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 18 reviews.
- MMMike M.Verified BuyerReviewingFederal Pacific NB100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/2/26100amp federal pacific breaker
So far the breaker works as expected
Just good to know some of these old federal are still available.
Thank you
- SGscott g.Verified BuyerReviewingFederal Pacific NB111020 - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/26/26Hard to find breakers
Had a project at a school built in the 1960’s and thought we were up a creek when confronted with ancient FPE commercial panels. Luckily we found what we needed with Suoerbreakers.
- BFBarry F.Verified BuyerReviewingFederal Pacific NB100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars6/13/26Hard to find circuit breaker
Item was as described.
- WWWilliam W.Verified BuyerReviewingFederal Pacific NB100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars3/9/26Exactly what I needed.
Awesome! Packaging and delivery were good. Bolted in and worked perfectly!!)
- GHGary H.Verified BuyerReviewingFederal Pacific NB125 - 125A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars3/3/26Federal Pacific NB125 2 Pole Circuit Breaker
Federal Pacific NB125 2 Pole Circuit Breaker
Great product and excellent price and warranty.