Site Considerations for Equipment Installation, Grounding, and Wiring Manual
D301452X012
October 2019
Grounding and Bonding of Solar PV Array 35
Either carefully abrade away the anodizing at the ground point or use sharp-edged stainless-steel
star washers between the ring lug and the surface (see Figure 6-2) to break through the brittle
anodized layer. You can apply these same methods to painted surfaces as well.
6.5 Grounding Method
Use a ring tongue terminal and 4 AWG wire to make the connection to the mounting frame of the
solar panel. The ring tongue terminal should fit a #10 stud (similar to Molex
®
0192210452). This
connection is made using a #10 x ½” hardened steel self-tapping sheet metal screw as shown in
Figure 6-2:
Figure 6-2. Proper ground connection to the mounting frame of a solar panel
Make the grounding conductor no longer than is necessary to safely and neatly make the
connection between the panel frame and the earth grounding electrode. The connection at the
earth-grounding electrode end of the grounding conductor varies depending upon the style of
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