Replacing circuit breakers in your electrical service panel however not sure which ones to use? usually you would just go come the panel and look up the specified breakers the manufacturer has actually listed. Maybe you’re do the efforts to conserve money or can’t find the component you’re feather for and now you’re searching for options. Here is the dirty truth around interchanging circuit breakers.

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Specified, UL divide / interchangeable Circuit Breakers

Specified breakers average the manufacturer has actually tested the breakers in the panel and listed them come be supplied in that panel. You have actually probably i found it “UL Classified” and also interchangeable circuit breakers about the market. These are breakers that have been tested in panels the they space approved for, comparable to manufacturer stated breakers. Essentially, they space a different brand indigenous the dashboard manufacturer however are tho in their electrical organization panel.

There’s a tiny controversy around UL Classified and also interchangeable breakers. Part manufacturers have no problem with share breakers while rather do. Manufacturers like Square D warns versus the usage of Classified and interchangeable breakers. They website the National electric Code (NEC) section 110-3(b), which says that using breakers not listed or labeled is a password violation. Their argument is for public safety drawing evidence native past accidents due to the usage of classified breakers in your panel. The images below are damages to a Square D load facility from using a share breaker.



Source: - Square D letter to electrical Inspectors.

Square D insists the this is a password violation i m sorry will an outcome in their warranty void. They went together far regarding say the you may shed your license. However, Eaton and the Underwriters activities (UL) would certainly disagree.

Public safety is a factor, i beg your pardon is why a 3rd party, like the UL, lists perfect manufacturer instead of breakers (UL Classified). These breakers accomplish UL and also NEC code regulations. UL has declared that world must adhere to every manufacturer gave instructions. Moreover, UL likewise stated the Classified breakers can be offered for their approved panels. (Source: UL Marking and also Application overview Panelboards). On the note of vouch void, manufacturers cannot void your warranty if the replacement part has proven come be safe by a third-party, for circumstances UL (Magnusson-Moss guarantee Act).

Compatibility Chart

There room charts that show what circuit breakers are interchangeable. Because that instance, the chart listed below shows an example of a cross recommendation of type CL 1″ breakers that might be interchangeable interchangeable for dashboard installations. Girlfriend can examine under the panel pillar for compatible Eaton UL divide breakers.

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In short, the manufacturer’s specification is constantly a good an initial choice. Otherwise, simply replace the same form of currently breakers in the box. Manufacturers would want to specify their very own breakers for use in their panelboards for apparent financial reasons. However, remember girlfriend have alternatives with UL share breakers favor the chart above. Some electricians use Classified breakers for obvious reasons, whether because that price, availability, or convenience. But which ever before circuit breakers you walk with, make sure to install them safely.