Well I am not sure what actually went on today but I have received a few calls from some home inspectors in the last few hour with a request for some clarity to the following questions, so here it goes…
The NEC (NFPA70) does not REFERENCE other standards. The NFPA prohibits that act directly within code language. The Informational Notes add direction but are not enforceable and may reference another standard only within these informational notes and not the standard itself.
Yes, you can use different breakers from different manufacturers in a variety of panels…as long as each panel clearly lists the permitted circuit breakers for use in that specific panel and again are listed for the use. As many of you know the only exception to that are Classified Circuit Breakers that have been evaluated as such for replacement purposes and evaluated as such. You simply can’t just put any Circuit Breaker that will “FIT” in any panelboard you wish…No they are NOT all the same…each manufacturer (and lets not forget I worked for NEMA) has to do independent testing and costly full evaluation with their CB’s in a specific enclosure with their companies panelboard.
For Example - If GE has not tested (event if you think it will work fine) their CB’s on an Eaton panelboard then the CB has not been evaluated for the use on an Eaton Panelboard…period…there is no gray area here!
You can spin it any why you wish…if it goes to court and you say it is OK…and it is not a classified CB…you are going to be liable in the unlikely event there is an issue…just want to clear the air on that.
Another question for some reason today via phone…No, you can’t TAP ahead of the service disconnection means and feed an outside HVAC unit, a home inspector just called me and said they learned today they could…This is not TRUE (unless you are meet 230.82 or are the Utility)…you are only permitted to tap service conductors ahead of the service disconnection means in accordance with the provisions of 230.82, and HVAC is not one of them listed.
If you are going to install a MultiWire branch circuit you can indeed use two single pole circuit breakers, where applicable…BUT they must be tied together with an “identified” handle tie…thats an important part of the allowance.
Hope I answered all the questions that the gentlemen that called me were looking to get clarity on and I posted them here per your request.
Again…remember I am always here to help you guys…you can easily find my number and if you EVER have a question, hear something you might think is incorrect or misleading or sounds fishy…you guys know I am just a call or email away…I told Nick years ago I would NEVER turn down a call from a INACHI Member seeking guidance on electrical issues.
Now I know we have great folks here…and we indeed have some experts and you can love me or hate me as I will even answer electrical questions from those who for some reason dislike me, but I just want you to know, while I don’t do a lot with INACHI anymore…I am still just a call away if you need me as the choice it always yours.
With that said…I hope all that attended the 2015 Inspector Conference had a great time and wish I could have stuck around for the final day (Wed) but I had to get to another meetings back in Texas.