Switch / Receptacle Box Typical Size

Status
Not open for further replies.

peter d

Senior Member
Location
New England
The generic Raco 189 in my hand, with a single gang 1/2 " ring on it mics out at exactly 1.75 " from the back of the back to the crest of the 8/32 cover screws.

The thickness of the steel box back + the thickness of the ring + the thickness of the cover screw heads all add to the interior box depth of 1.5 ".

That extra 1/4 " will play havoc with the flatness of the wall if it is proud of the framing face. Whether it is proud will be entirely a function of how tight the 1.5" stud is to the masonry wall.

You actually mic'd a box and plaster ring combo? Words fail me. :huh:
 

al hildenbrand

Senior Member
Location
Minnesota
Occupation
Electrical Contractor, Electrical Consultant, Electrical Engineer
I figured a tape measure would be accurate enough.

It'll definitely do in a pinch. The caliper's nice cause of the ability to hold the measurement and to read off the higher accuracy than what my sight line by a tape would do.

The thing about the basic 1900 with plastering thickness is that it has always "felt" like about 1-3/4 inches but I'd never really checked it.
 
Status
Not open for further replies.
Top