Rockwell Automation 8720MC High Performance Drives Installation Manual - Manual (Page 25)

Publication 8720MC-IN001D-EN-P — December 2002
Installing Your 8720MC Drive 1-13
The illustrations that follow (refer to Figure 1.4) show details of
recommended bonding practices for painted panels, enclosures, and
mounting brackets.
Figure 1.4
Recommended Bonding Practices for Painted Panels
Stud-mounting the subpanel
to the enclosure back wall
Stud-mounting a ground bus
or chassis to the subpanel
Subpanel Welded stud
Scrape paint
Flat washer
If the mounting bracket is coated with
a non-conductive material (anodized,
painted, etc.), scrape the material
around the mounting hole.
Star washer
Nut
Nut
Flat washer
Mounting bracket or
ground bus
Use a wire brush to remove paint from
threads to maximize ground
connection.
Back wall of
enclosure
Welded
stud
Subpanel
Star washer
Use plated panels or scrape paint on
front of panel.
Subpanel
Nut
Nut
Star washer
Flat washer
Star washer
Star washer
Scrape paint on both sides of
panel and use star washers.
Tapped hole
Bolt
Flat washer
Ground bus or
mounting bracket
If the mounting bracket is coated with
a non-conductive material (anodized,
painted, etc.), scrape the material
around the mounting hole.
Bolt-mounting a ground bus or chassis to the back-panel