They have one job: make the connection stiffer! Obviously I don't need them all for wire pass-through. You could probably get acceptable stiffness with 2 box spacers, but I'd still use 3 just to impress the inspector. I really go to town on these.īetter, if you can find it, is 4x4 boxes with all 3/4" openings. This style of conduit nut is tightened by putting a flat blade screwdriver on the tangs, and then hitting the back of the screwdriver with a hammer or the side of your pliers. Then, I install box spacers in every knockout and bang them down hard. What I do is rotate the boxes so that the knockouts line up. It is specifically made for that and gives about 3/8" spacing. What you want there is a Rigid (RMC) Box Spacer. ![]() (2) What kind of connector do I use between the two boxes? I think I need to have a little bit of distance between the two boxes - like maybe a half inch or so - to make sure the mud rings fit nicely.
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