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What is the difference between a Surface and Flush cover and does Schneider Electric offer both covers for the Square D QO and Homeline load centers?

Issue:
Product Design Features

Product Line:
Homeline Load Centers

Environment:
Flush covers

Cause:
Application

Resolution:
THIS INFORMATION ONLY APPLIES TO NEMA 1(INDOOR) load centers.

A Surface cover is designed to be used when a load center is mounted surface on the wall and the cover will only extend to the edges of the load center box(so it will be the same width and height as the box itself)

A Flush cover is designed to be used when a load center is mounted Flush(or inside the wall cavity) and the cover will extend beyond the edges of the load center box, approximately 5/8 of an inch all the way around the box. So the flush cover is the width of the box PLUS 5/8" x 2 and the height of the box, PLUS 5/8" x 2. These are APPROXIMATE dimensions. 

The QO load centers do not come standard with a cover from the factory, covers are ordered separately. There are separate catalog numbers for either a surface or a flush cover. SEE THE CURRENT DIGEST FOR THE SEPARATE CATALOG NUMBERS

The Homeline load centers come standard with a 'Combination' cover from the factory and is used for both Surface and Flush applications. Homeline load centers do NOT have a separate Surface or flush cover. 
The combination cover will have approximately 5/8" overhang all the way around the load center box, so it will be the same size as described above for a Flush cover.  
For example, ALL the NEMA 1, indoor Convertible Mains Homeline boxes are 14.25" wide to fit into standard stud bays and the combination cover would be approximately - 14.25" + 5/8" + 5/8" = 15.5" wide and this would also apply to the height of the box.


 
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