Stud-mounting the Subpanel
to the Enclosure Back Wall
Subpanel
Star Washer
Nut
Back Wall of
Enclosure
Welded Stud
Use a wire brush to remove paint from
threads to maximize ground connection.
Use plated panels or scrape paint on
front of panel.
Nut
Star Washer
Welded Stud
Flat Washer
Stud-mounting a Ground Bus
or Chassis to the Subpanel
Scrape Paint
Flat Washer
If the mounting bracket is coated with
a non-conductive material (anodized
or painted), scrape the material around
the mounting hole.
Mounting Bracket or
Ground Bus
Subpanel
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
or painted), scrape the material around
the mounting hole.
Bolt-mounting a Ground Bus or Chassis to the Back-panel
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