© 2015 SunEdison
10
F-SERIES and R-SERIES
72-Cell Installation Guide
4.3 Option A: Metal Lug
SunEdison recommends copper or tin plated grounding
lugs rated for outdoor use and used with a #12 or
larger wire. The use of a copper split bolt connector is
authorized for well.
Attach the grounding lug to the frame by referring to
Figure 3 and the following steps:
Use stainless steel metric or English sets only. Please
refer to the following list for the minimum hardware
requirements for each set.
Metric set
- Stainless Steel Bolt M4
- Stainless Steel Nut M4
- Stainless Steel Flat Washer M4
- Stainless Steel Spring Washer M4
- Stainless Steel Lock-Toothed Washer M4
- Stainless Steel Slotted Washer M4
English set
- Stainless Steel Bolt #8-32
- Stainless Steel Nut #8-32
- Stainless Steel Flat Washer #8-32
- Stainless Steel Spring Washer #8-32
- Stainless Steel Lock-Toothed Washer #8-32
- Stainless Steel Slotted Washer #8-32
Step 1:
Place the grounding lug over the grounding hole
on the exterior of the module frame.
Step 2:
Place a star washer directly between the bottom
of the grounding lug and the exterior surface of
the frame.
Step 3:
Place a bolt through the lug, star washer and
frame grounding hole.
Step 4:
Secure the lug to the frame using a flat washer,
split washer and nut.
Step 5:
Torque the bolt stack to approximately 1.5
–
2.3
N·m (1.1
–
1.7 ft·lbs) to ensure the star washer
penetrates the anodized frame.
Figure 3:
Option A Grounding Lug Assembly
