EN-Rev IM/IEC-AM-EN/3.6 Copyright © March 2017. Canadian Solar Inc.
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5.2
GROUNDING
· Although the modules are certified to Safety Class
II, we recommend that they are grounded and that
module installation should comply with all local
electrical codes and regulations.
· Grounding connections should be installed by a
qualified electrician.
· Connect module frames together using adequate
grounding cables: Canadian Solar recommends
using 4-14 mm² (AWG 6-12) copper wire. Holes
provided for this purpose are identified with a
grounding symbol . All conductive connection
junctions must be firmly fixed.
· All bolts, nuts, flat washers, lock washers and other
relevant hardware should be made of stainless
steel, unless otherwise specified.
· Canadian Solar Inc. does not provide grounding
hardware.
· One grounding method is recommended for
Canadian Solar Inc. standard modules with 5 mm
(0.20 in) grounding holes, as described below. For
alternative grounding methods, please refer to
our Installation Manual Annex (Section Annex B:
Alternative Grounding Methods) on the website
(www.canadiansolar.com). It is not possible to use
standard grounding methods for certain module
ranges. Please refer to Annex B for more details.
GROUNDING METHOD:
BOLT + TOOTHED NUT + CUP WASHER.
· A grounding kit containing an M5 (3/16") SS cap
bolt, an M5 (3/16") SS flat washer, an M5 (3/16") SS
cup washer, and an M5 (3/16") SS nut (with teeth)
is used to attach copper grounding wire to a pre-
drilled grounding hole on the frame (see image
below).
· Place the wire between the flat washer and the cup
washer. Ensure that the cup washer is positioned
between the frame and the wire with the concave
side up to prevent galvanic corrosion. Tighten the
bolt securely using the SS toothed nut. A wrench may
be used to do this. The tightening torque is 3-7 Nm
(2.2-5.2 ft-lbs).
To fix the wire between
the flat washer and
cup washer, place the
cup washer (concave
side up) between the
frame and the wire.
Then tighten the bolt
using the toothed nut.
6.0
MOUNTING INSTRUCTIONS
STANDARD MODULES
· For a clear understanding of our modules, please
refer to the illustration of a standard module shown
below:
Grounding holes
Junction box
Standard mounting holes (long side)
Additional mounting holes
(high wind or snow loads)
Standard mounting holes (short side)
Module frame
Cables and connectors
