© 2015 SunEdison
9
4.3 Grounding
Module frames and structures grounding must be
compliant with all national and local regulations.
SunEdison recommends grounding all module frames
and associated structures in order to maintain a zero-
voltage potential between the electrically conductive
equipment and the earth in all scenarios.
SunEdison modules use a coated aluminum frame
for corrosion resistance. In order to ensure proper
grounding the coating must be penetrated by the
grounding method. A copper grounding wire with a
minimum gauge of 12 AWG is recommended to carry
the electrical ground load. Consult applicable codes
to ensure the appropriate conductor diameter is used
for the system. The grounding method must not allow
direct contact of dissimilar metals with the frame of the
module, as this would result in galvanic corrosion. UL
1703 recommends metal combinations not to exceed a
voltage potential of 0.5.
The frame has predrilled holes marked with a grounding
sign as illustrated in Figure 2. These holes should be used
exclusively for grounding.
Do not drill additional holes
or modify existing holes in the frame.
Figure 2:
Image of the grounding holes
