EN-Rev IM/GN-RM-EU/1.21P Copyright © June, 2021. CSI Solar Co., Ltd.
www.csisolar.com
a suitable conductor gauge to minimize voltage drop
and ensure that the conductor ampacity complies with
local regulations (i.e. NEC 690.8(D)).
CABLE AND CONNECTOR PROTECTION
Secure the cables to the mounting system using UV-
resistant cable ties. Protect exposed cables from
damage by taking appropriate precautions (e.g. placing
them inside a metallic raceway like EMT conduit). Avoid
exposure to direct sunlight.
A minimum bending radius of 60 mm (2.36 in) is
required when securing the junction box cables to the
racking system.
Protect exposed connectors from weathering damage
by taking appropriate precautions. Avoid exposure to
direct sunlight.
Do not place connectors in locations where water could
easily accumulate.
5.2 GROUNDING
For grounding requirements in North America, a
module with exposed conductive parts is considered to
comply with UL 1703 only when it is electrically
grounded in accordance with both the instructions
presented below and the requirements of the National
Electrical Code. Any grounding means used with
Canadian Solar modules should be NRTL certified to UL
467 and UL 2703 standards. Please consult our
technical service team for the formal approval process.
For grounding requirements in other areas, although
the modules are certified to Safety Class II, we
recommend them to be grounded and that module
installation should comply with all applicable local
electrical codes and regulations. Grounding
connections should be installed by a qualified
electrician. Connect module frames together using
adequate grounding cables: we recommend using 4-14
mm² (AWG 6-12) copper wire. Holes provided for this
purpose are identified with a grounding symbol
(IEC 61730-1). All conductive connection junctions
must be firmly fixed.
Do not drill any extra ground holes for convenience as
this will void the modules warranty.
All bolts, nuts, flat washers, lock washers and other
relevant hardware should be made of stainless steel,
unless otherwise specified.
Canadian Solar does not provide grounding hardware.
The grounding method described below is
recommended for Canadian Solar.
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 above).
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.