Mechanical Installation
Factors Affecting Panel Layout Design and Clearances
WARNING: It is important to follow the requirements of the panel manufacture and to follow all applicable electrical
codes and standards.
The designer of a panel layout must assess the requirements of a particular system and to consider the following
design factors.
Clearance / Adequate Space
Install devices to allow sufficient clearance to open and close the panel door.
Minimum Clearance Requirements for Panel Box and Door
Minimum Distance between base of device and sides of cabinet 2” (50.80mm)
Minimum Distance between base of device and wiring ducts 1.5” (38.10mm)
If more than one device installed in panel box (or on door):
Minimum Distance between bases of each device
4” (101.60mm) between bases of each
device
When door is closed:
Minimum distance between device and closed door
(Be sure to allow enough depth for the OCS.)
2” (50.80mm)
Page 18 of 163
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