When is a box extender needed?

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Old 03-21-10, 11:11 AM
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When is a box extender needed?

While I know flush with the wall is ideal, how far back from drywall can a box be before it is an issue? This is all in reference to existing boxes on a 50+ year old home. My issue is that as I'm replacing outlets I am finding boxes that range from being installed pretty much flush to those probably over an inch back. I have no problem figuring out what to do with the boxes at the extremes, but I'm trying to figure out at what point I need to use the extender. An example of my question is below where the most any side of the box is from the wall is 1/8"

 
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Old 03-21-10, 11:47 AM
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As I understand..you are allowed 1/4" from the face of the wall in non-combustible material.

At least thats what was mentioned several times when I searched for "box depth" using advanced search.
 
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Old 03-21-10, 07:35 PM
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Originally Posted by Gunguy45 View Post
As I understand..you are allowed 1/4" from the face of the wall in non-combustible material.

At least thats what was mentioned several times when I searched for "box depth" using advanced search.
You are correct. 1/4 is the code
 
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