Copyright Bosch Solar Energy Corp., version 1.0
Page 15 of 19
Figure 7B: Installation of the grounding lug
In this grounding method the serr ated ‘star’ washers are required for making a reliable
gr ound connection thr ough the anod ized coa ting and into the aluminum frame as
well as to prevent loosening of the screw over time.
An alternative method of attaching the grounding lugs may require the use o f #8-32 (4mm)
bolts, nut, star washers and lock washers. The ground lug shall be installed from the
bottom side of the frame using the paint cutting star washers, lock washer and bolt.
Torque t h e hex bolt (if used) to 50-70 in-lbs. This ground hardware can accommodate a
14AWG through 4AWG bare (stranded or solid) wire.
