PB 1.1-2007
Page 4
Section 4
INSTALLATION OF PANELBOARD CABINETS (BOXES)
4.1 INSTALLATION INSTRUCTIONS
Installation of the cabinet in a neat and workmanlike manner. Follow the manufacturer's installation
instructions.
4.2 LOCATION IN BUILDING
Locate the cabinet so that it is readily accessible and not exposed to physical damage.
4.3 FLAMMABLE MATERIAL
Locate the cabinet well away from flammable material.
4.4 UNUSUAL SERVICE CONDITIONS
Do not locate the cabinet where it will be exposed to ambient temperatures above 40°C (104°F), corrosive
or explosive fumes, dust, vapors, dripping or standing water, abnormal vibration, mechanical shock, high
humidity, tilting, or unusual operating conditions, unless the cabinet/panelboard combination has been
designed and so identified by the manufacturer for these conditions.
4.5 INDOOR DAMP LOCATIONS
Locate or shield the cabinet so as to prevent moisture and water from entering and accumulating therein.
Mount the cabinet so that there is at least 1/4 inch of air space between the cabinet and the wall or other
supporting surface.
4.6 WET LOCATIONS
Cabinets should be specifically approved for wet locations. Mount the cabinet so that there is at least 1/4
inch of air space between the cabinet and the wall or other supporting surface.
4.7 CLEARANCE FROM CEILING
Do not locate the cabinet against a non-fireproof ceiling; allow a space of 3 feet between the ceiling and
cabinet unless an adequate fireproof shield is provided.
4.8 SPACE AROUND THE CABINET
When selecting a location, provide sufficient access and working space around the cabinet (See Section
110.26 of the National Electrical Code). The width of the working space in front of the panelboard should be
at least 30 inches and this space should not be used as storage. The working space should have adequate
lighting and a minimum head room of 6 feet 6 inches.
4.9 MOUNTING OF CABINET
The cabinet should be reliably secured to the mounting surface. Do not depend on wooden plugs driven into
holes in masonry, concrete, plaster, or similar materials. (See Section 110.13 of the National Electrical
Code.)
© Copyright 2007 by the National Electrical Manufacturers Association.
To Next Page
Loading...
Need help?
General