Cable clamp for 1/2 inch knockout and 10/3 romex?

mikegp

Having trouble locating what I need. I tried hd online chat and the guy was clueless. It's difficult to even search for this. I need a cable clamp for my inlet box with a 1/2 inch knockout. The 3/8 hole was too small. I thought of just dremeling it to be a little bigger, but don't know if that could cause a problem later on with a sharp edge touching the sheathing. Thanks for any help.

joecaption

http://www.homedepot.com/h_d1/N-5yc1...&storeId=10051

Is thiis what you looking for?
You can use a step drill if the hole in the panel needs to be made bigger.

frenchelectrican

For the half inch fittings the actual KO opening size is 7/8 inches so that is very common item and with standard NM connector as one of the guys left a link.,

The 10-3 NM will fit in there for only single cable

But if you used the 10-3 UF cable forget it you will need larger NM clamp for that cable. ( due it will be flat and pretty wide )

Merci,
Marc

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The answer will be based on NEC ( National Electrical code ) or CEC ( Cananda Electrical code ) or ECF ( Electrique Code France )

mikegp

That looks like it will work from the pic, but I have 3/8 ones here and the hole is tiny. I guess I'll just go check at the store. Thanks.

Jim Port

Is there a clamp already in the box?

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Answers based on the National Electrical Code. Local amendments may apply. Check with your local building officials.

mikegp

Inlet box just has a knockout. No clamps included.

mikegp

I just dremeled it out and it looks like it'll be fine. No sharp edges or anything. I appreciate the help.

rrolleston

It's required that you use a clamp to prevent the wire from getting pulled our or rubbing on sharp edges.

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Please ask me about my special discount for people that shut up and stay out of my way! With Electricity there is the right way to do it and the dead way. Just because it works does not make it safe.

J. V.

You might have 3/8ths cable end, but they don't make 3/8 electrical male end connectors. 1/2" is the smallest trade size available/allowed.
You should use a trade size 3/4" connector or bigger for a 10/3 cable.
The 3/8 hole is a starter hole for a knock out or to drill it out.

Sounds good to me.

mikegp

I don't think I made clear what I was talking about. The knockout is 1/2 an inch, but the clamp has a smaller hole for the cable to go through before it can be tightened down. Hope that makes sense. Otherwise I'll post a pic.