NM connector clamps for 4-11/16 box
#1
Member
Thread Starter

I'm rough wiring my kitchen and I have to add another NM cable to a switch box so fill calculations dictate that I upgrade the box to a 4-11/16 square box. The problem is the boxes only have two huge knockouts on each side and my existing cables must come in the top - all four.
What kind of clamps can I get to let the four 12ga cables enter the two top huge knockout holes?
Thanks guys!
What kind of clamps can I get to let the four 12ga cables enter the two top huge knockout holes?
Thanks guys!
#2
What's the depth of that box of yours? I use lots of 4-11/16 boxes here at home just for the "room".. . none of them has just 2 huge KOs like you're describing. I'd say look at another supplier. The Raco 257 for example has 3x 1/2 (or 3/4) KOs on each side. No problem with regular NM clamps there.
#3
4-11/16" boxes comes with many different knockout configurations.
If you have a 4" square (1900) box already in use.... you can add an extension ring to enlarge the working area.
If you have a 4" square (1900) box already in use.... you can add an extension ring to enlarge the working area.

#6
Member
Thread Starter
This is the box 4-11/16 in. Square Welded Box, 2-1/8 in. Deep with 1 in. KO's (25-Pack)-258 - The Home Depot
2-1/8" deep
Only has the two monster knockouts.
I guess I need one like PJmax pictured and a clamp that accepts 2 wires in one hole. Agreed?
2-1/8" deep
Only has the two monster knockouts.
I guess I need one like PJmax pictured and a clamp that accepts 2 wires in one hole. Agreed?
#7
The do make those larger boxes with smaller ko's. They did have them at the depot but they aren't showing online now.
You can get them at an electrical supply house.
You can get them at an electrical supply house.
#9
Forum question: every time I go to post in either Chrome or FF I have to log-in.
#10
We have brought the log issue to the admins. Issue is with the latest upgrade of the forum site and there appears to be no fix until next upgrade which will be this fall. Sorry for the inconvenience. I REALLY hate it too.
