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Old 05-29-2014, 05:44 PM   #1
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4 square box with round mudring for junction at wall light


Hi. I need to join some cables at a wall sconce/light location and want to use a 4 inch or 4-11/16 box with a round mudring. If the sconce/wall light canopy will cover the mudring is it against code not to put drywall over the mudring?

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Old 05-29-2014, 06:44 PM   #2
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4 square box with round mudring for junction at wall light


That's what mudrings are made for.

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Old 05-29-2014, 09:14 PM   #3
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4 square box with round mudring for junction at wall light


314.21 Repairing Noncombustible Surfaces. Noncombus-
tible surfaces that are broken or incomplete around boxes
employing a flush-type cover or faceplate shall be repaired
so there will be no gaps or open spaces greater than 3 mm
(1⁄8 in.) at the edge of the box.
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Old 05-29-2014, 09:23 PM   #4
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4 square box with round mudring for junction at wall light


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Originally Posted by Techy View Post
314.21 Repairing Noncombustible Surfaces. Noncombus-
tible surfaces that are broken or incomplete around boxes
employing a flush-type cover or faceplate shall be repaired
so there will be no gaps or open spaces greater than 3 mm
(1⁄8 in.) at the edge of the box.
???? The OP is simply asking if drywall or other finished material is required... I say NO.
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Old 05-29-2014, 09:52 PM   #5
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4 square box with round mudring for junction at wall light


The box will be in the wall and mounted to a stud. The mudring will be flush with the drywall as usually done. The drywall is already up and I have a square hole there already. I was wondering if I had to add drywall up tight to the round area of the mudring.
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Old 05-29-2014, 09:58 PM   #6
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4 square box with round mudring for junction at wall light


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Old 05-29-2014, 10:08 PM   #7
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4 square box with round mudring for junction at wall light


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The box will be in the wall and mounted to a stud. The mudring will be flush with the drywall as usually done. The drywall is already up and I have a square hole there already. I was wondering if I had to add drywall up tight to the round area of the mudring.
AH, that changes everything. Yes, it must be have no larger than 1/8th gap.
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Old 05-30-2014, 12:26 AM   #8
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4 square box with round mudring for junction at wall light


Ok. I'll have to do something different. Is there a square box that is made for mounting fixtures that is higher capacity. The circle mounting strap I have lines up with the holes on a four square two gang switchbox like I posted a picture of below, but the holes are 6-32 and I think they have to be 8-32. Can I tap them out to 8-32 or is that a violation for modifying a box?
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Old 05-30-2014, 06:25 AM   #9
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4 square box with round mudring for junction at wall light


Those boxes are rarely used (at least I rarely see them). Post a picture of your fixture strap because I don't think any fixture strap is made for the box you posted.
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Old 05-30-2014, 06:48 AM   #10
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4 square box with round mudring for junction at wall light


Wall mounted fixtures are allowed to use the 6-32 screws if they weigh less than 6 pounds and are less than certain dimensions.

If drywall is installed it must be patched to fit the box opening.
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Old 05-30-2014, 01:23 PM   #11
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4 square box with round mudring for junction at wall light


The fixture strap is just like the one in the picture below. The fixture weighs 2 pounds. Two of the screws in the box line up with two in the strap, but if you guys think it's a bad idea, I'll use the square to circle mudring and patch the drywall.
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Old 05-30-2014, 01:36 PM   #12
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4 square box with round mudring for junction at wall light


Install a single gang plaster ring and patch around it. That will be easier to keep the mud out of the box.
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Old 06-03-2014, 02:25 PM   #13
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4 square box with round mudring for junction at wall light


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Those boxes are rarely used (at least I rarely see them). Post a picture of your fixture strap because I don't think any fixture strap is made for the box you posted.
Here is what I was thinking with this box and another masonry style box. Would this be acceptable?
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4 square box with round mudring for junction at wall light-100_2345.jpg   4 square box with round mudring for junction at wall light-100_2346.jpg   4 square box with round mudring for junction at wall light-100_2343.jpg  
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Old 06-03-2014, 03:48 PM   #14
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4 square box with round mudring for junction at wall light


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Here is what I was thinking with this box and another masonry style box. Would this be acceptable?
You had the right answer in your first post. In IL 4" square metal boxes are the norm due to EMT requirements. Mud rings on front. Your mounting plate is meant to see a round box or round mud ring. Why fight it?

Buy a bag of 20 minute powered drywall compound. Mix up a bit and fill in the gaps around the mud ring to existing drywall. Since this stuff chemically hardens it'll be rock hard in 60-90 minutes.... Also since your escutcheon plate sounds large you don't even need a perfect paintable finish to the patch. Wipe away any excess mud from drywall with a wet sponge before it hardens.
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Old 06-03-2014, 07:15 PM   #15
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4 square box with round mudring for junction at wall light


Ok. Thanks. I'll do the circle mudring and do the setting compound mud up to it. Thanks for all the replies.

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