@erik_squires said:
Generally speaking, @jea48 is right about not mixing breakers.
Technically speaking, if you are mixing breaker brands the breaker has to be "listed" as being tested with the other maker’s panel. I believe this has to do with the maximum interrupt current of the individual vs. main breakers. In any event...
First, per NEC, all circuit breakers shall be Listed.
Quote:
NEC 110.3(B)
Installation and Use. Equipment that is listed, labeled, or both shall be installed and used in accordance with any instructions included in the listing or labeling.
End of quote.
The section is talking about the manufacturer of the electrical panel. Not because a different manufacturer breaker is Listed. The different manufacturer’s breaker is not approved for use in the panel by the manufacturer of the panel.
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Even if you do get a "listed" breaker, when you go to sell the inspector probably won’t bother to check if it’s listed or not and will flag it as something to be corrected. Just not worth the hassle or potential $10 in savings.
True, are any of them home inspectors retired licensed electrical inspectors or retired licensed electricians? The extent of their electrical knowledge is to use a plug-in circuit tester to check for an Open Ground at wall outlets. And GFCI outlets required in the house per Code.
As for installing a different manufacturer’s circuit breaker in another’s manufacturers electrical panel that has been in the NEC for years. I know first hand, on a few instances the electrical inspector seen the violation. Not I ,well maybe I did, but usually the breaker was installed by a different electrical contractor/electrician previously.
Problem is doing electrical work in old buildings in a city where a remodel is taking place. The General Contractor pulls a permit... All subs pull permits. The general contractor can’t call for an inspection until the subs call for an inspection, (if a sub’s work needs inspection before the general contractor’s inspection.)
Problem for the Electrical contractor/Electrician? Usually at the final electrical inspection. The electrical inspector will say something like "did you add any new circuits?" LOL, he knows you did... "Show me the panel." Usually the circuit breaker manufacturer’s name is on the face of the breaker. Problem? The electrical panel manufacturer went out of business years ago. There are no NOS stock breakers. There definitely are not any Tandem breakers. They didn’t exist back then.
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