Helios 6T Series, Operation/Maintenance And Installation

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INSTALLATION MANUAL – 2012
19
HUSA-EN-UL-REV 2.0 APR 16 2012
Grounding
The modules are certified double insulated, however it is recommended that they be grounded. In U.S.
and Canada only: all PV modules must be grounded by electrical connection from the module frames to the
ground. A UL-listed grounding lug should be used.
Ensure compliance with all local electrical codes and regulations.
Several different methods of grounding can be used to provide the required connection through the
anodized frame; the following methods of performing this task are acceptable.
A UL-listed grounding lug may be used. The existing grounding holes in the module frames should be
used as the point of attachment to the module frame (the diameter M8 –5/16”- groundings holes on the
module frame, identified with a yellow label). To ensure a conductive connection, i.e. to penetrate the non-
conductive coating on the frame, a combination of screw, spring washer and lock nut must be used to
mount the grounding lug onto the frame. The spring washer must be placed between the frame and the
grounding lug. Use all stainless steel hardware to mount the lug to the module frame.
The grounding lug has to be capable of accepting a 4-14 AWG (see
annex A for AWG mm
2
sizing) copper conductor. Modules can be
grounded using clip systems provided they have been tested and
certified to local regulation on anodized aluminum frame and are
installed according to the manufacture’s specified instructions.
Connect module frames to each other using cables with cable lugs.
All the connections on the conductive connection must be fixed.