© 2015 SunEdison
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4.3 Option B: Racking Manufacturer
Integrated Grounding Methods
Integrated grounding methods must be appropriately
certified to UL standards and must be in accordance
with the specified instructions of the respective
manufacturer. SunEdison modules can be grounded
by bonding modules to a grounded racking system.
SunEdison recommends using its internally developed
integrated grounding clip, PN: 720256 with its piloted
bolt, PN: 720230. The grounding clip utilizes a 304
stainless steel KEP nut to make the ground connection,
and the geomet finished bolt carries the current to the
grounded structure. The torque specification for the bolt
and clip is 14.9 N·m (11 ft·lbs).
If the clip is not available, SunEdison also recommends
using the BURNDY WEEBs integrated rack grounding,
part numbers WEEB-ADC, WEEB-ADR, WEEB-WMR1 and
WEEB-WMR2. These devices are made of 304 stainless
steel that properly ground the modules with specialized
teeth that penetrate both module and structure. Should
you choose a rack integrated method that is not approved
by UL please contact SunEdison before proceeding to
determine compatibility.
4.3 Option C: Bolt Wire Assembly
Step 1:
Attach grounding lug at one of the designated
aforementioned grounding hole locations. Using
only stainless steel hardware, insert a stainless
steel bolt first through the stainless steel cup
washer, and then through the grounding hole.
Step 2:
Loosely add a stainless steel backing nut and
a toothed lock washer to the bolt.
Step 3:
Bend the EGC into an Omega (
Ω
) shape to tightly
fit between the partially installed bolt head
and cup washer. The EGC will be exclusively in
contact with the steel.
Step 4:
Tighten the bolt to approximately 4 N·m (35 in·lbs)
of torque. The toothed washer must penetrate
the coated aluminum.
Step 5:
Route the correctly sized ECG wire without
bringing the wire into contact with the module
frame.
4.3 Option D: Alternative Grounding
To use other code compliant frame grounding methods
that are UL certified contact SunEdison for approval.
Figure 4:
Option B Grounding Lug Assembly
Figure 5:
Option C Bolt Wire Assembly
Mounting Rail Here
