Is there enough room in your 2 gang box to properly splice 2 of those fat cables? I doubt it.
I think I'd be pulling that 2 gang box and redoing this. It's too small for that wiring
They have to be in some type of conduit, so that ain't gonna work either unless you want to tear the wall apart. What is feeding the two gang now that you have to come out of it?
Because the wire is going to be stiffer than a wedding **** and there won't be much room to get it bent around and into the box on top of the knockout may not be big enough for a UF cable. UF is flat and wide.
It is. I thought it was a handy box, but in the new pics it looks like a plastic two gang. I don't think it's that big of a deal even if it had to be drilled. When I thought it was a handy box and #6 SER, it would have been in a 3/4 romex connector. But, now it's been shown to be #4 and that would have to be a 1" KO if it were a metal box.
You won't be able to fish that unless it's in some type of conduit like flex and you can't get a flex connector in that plastic box. The SER cable you have a picture of could be fished, but can't be used underground so the XHHW you want to use will have to be individual conductors, thus, it needs to be in conduit.
An extension box would make it much easier in all ways but still might not be easy enough.
What?
I fixed it while you were posting. I meant underground.
Ok. Pay attention. The XHHW cable you posted a picture of is part of a cable assembly known as SER cable. That does not have to be in conduit so it could be fished without conduit. Unfortunately, it cannot be used underground so you would have to use individual XHHW conductors for that part. Those have to be in some type of conduit. So, how are you going to pull those from the garage to the LB, then get them into the existing box? Hint: you need to transition from the individual conductors to the SER cable and you can't splice in an LB. To do that, you will need a box 6X the diameter of the conduit you use. 2" conduitX6= a 12" box which could be used instead of an LB but it's going to look like ****.
It will fit in 1" but I don't know if a two gang Bell box extension with a 1" KO exists. I've used many one gang extensions when I couldn't fit 10 pounds of **** in an eight pound box and those always had 1/2" hubs but I didn't need those so I didn't care. I do know that there's no way they were deep enough for a 1" hub, but there might also be deeper versions but I'm not going to look. Google is a friend.
I honestly don't know about that one. I would think that at a minimum, the jacket of the SER would have to make it into the new box. Then there's the listing on top of everything else.
No. It's not an extension box.
