PB 1.1-2007
Page 5
4.10 FLUSH MOUNTING IN WALL
In walls of concrete, tile, or other noncombustible material, install the cabinet so that its front edge will not set
back more than 1/4 inch from the finished surface. In walls of wood or other combustible material, cabinets
should be flush with or project beyond the finished surface. (See Section 312.3 of the National Electrical
Code.)
4.11 UNUSED OPENINGS IN CABINET
Effectively close unused openings in the cabinet to provide protection which is substantially equivalent to
that afforded by the wall of the cabinet.
4.12 GROUNDING OF PANELBOARD CABINETS
Ground the cabinet as specified in Article 250 of the National Electrical Code. When the cabinet contains
service equipment, it is necessary to bond the cabinet to the grounded (neutral) service conductor.
© Copyright 2007 by the National Electrical Manufacturers Association.
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