Junction Box Do & Dont

[Spudland_Dave]

Is it ok to have a single large JB with a bunch of circuits in it? Or are you limited to 1 JB to 1 circuit?

What I'm thinkin is while I think I got most of my electrical all set for that one panel, I'd like to future proof things as well. So I was thinkin of running 3 or 4 runs of 3/4" Conduit from the panel up into a large JB in the attic before I insulate & seal it up. At 16, 12ga conductors per conduit, thats MORE then enough expansion...that will be always accessible if needed.

 

[Aceman]

You're fine.

 

[Lotek]

Get a bigger box than you think you will need, mount a couple of terminal strips in the bottom for the neutral and ground wires, label everything. btdt.

 

[Stuart in MN]

The junction box needs to be accessible, so when you say you're going to seal up the attic will there still be an access door or hatch? Also, the box needs to be sized properly for the number of junctions inside it.

 

[Spudland_Dave]

Get a bigger box than you think you will need, mount a couple of terminal strips in the bottom for the neutral and ground wires, label everything. btdt.

You got pics of those terminal strips?

 

[Spudland_Dave]

The junction box needs to be accessible, so when you say you're going to seal up the attic will there still be an access door or hatch? Also, the box needs to be sized properly for the number of junctions inside it.

Yes I will have access doors to get into the unfinished areas. Its really going to be a Finished attic space (Attic trusses) in terms of the room designed up there, but the area outside of the "room" will not be finished at all. Just insulated. I will be putting access panels so I can get to either side...

 

[Maine]

The only concern is box fill, I would get a 6x6x6 box or use a 4x4 box for each conduit.