Questions tagged [nec]

For questions about the National Electrical Code, NFPA 70. Just about all US jurisdictions that have adopted an electrical code use the NEC, often with a handful of local or state level amendments.

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Can electrical conduit cross over a gas line?

I'm running conduit to my shop for a subpanel. The conduit coming out of my house crosses over my gas line (see pic). Is this allowed? I just put the conduit in and wondered if this will get ...
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32 views

NM cable routing to panel backboard / side of the service panel. Take 2. Any NEC 2017/2020 concerns?

Going off of my previous question, I wanted to get a confirmation the below is compliant with NEC2017/2020 for connecting NM cable to a main panel. I have used a length of 12/2 NM cable to show how I ...
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51 views

How do I connect surface wireway to a breaker box?

I am running Legrand/Wiremold 4000 series for a garage shop. The instructions for the panel connector (4086A) consist of a tiny picture that implies all I need to do is cut a large square hole in my ...
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75 views

Does ground bar block my knockouts?

Can I use the knockouts right next to my ground bar, or does it permanently block them? I'm wondering if I am allowed to run conductors across/over the ground bar and if I can put EMT connectors in ...
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40 views

Can both a 240V power supply and a 120V power supply, coming from a sauna heater's single power unit, go to the same outbuilding?

So the situation is as follows: I've found an electric sauna heater I want to use in the detached, outdoor sauna I'm building. The outdoor sauna is 55' away from the house, so I'm planning to bury PVC ...
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49 views

NEC 2020 Compliant feed to an outbuilding

I am doing something similar to Running Service to Outbuilding. I tried asking for clarification there, but couldn't figure out how to. Sorry to start a new Q. If there is a better way, I'd appreciate ...
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138 views

Independent circuits on a common trip CB

Is it permissible under the 2014 NEC to feed two independent 120VAC branch circuits from a common trip (aka double pole) circuit breaker? The circuits do not share a neutral wire, and are ordinary ...
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1answer
60 views

can an indoor Transfer Switch be used on the other side of the wall as an outdoor service entrance and main panel?

Can an indoor Transfer Switch be used on the other side of the wall as an outdoor service entrance and main panel? The concept is: The outdoor service entrance is wired through the wall to the SE ...
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75 views

run data cable for outlet inside box?

I'd like to run a data communication cable through all of the outlets, light fixtures and switches in a house. (I already have the walls open for other reasons.) Think something like a hardwired X10, ...