Manual

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7
5.1
MODULE WIRING
CORRECT WIRING SCHEME
· Ensure that the wiring is correct before starting
up the system. If the measured open circuit
voltage (Voc) and short-circuit current (Isc)
differ substantially from the specifications, this
indicates that there is a wiring fault.
CORRECT CONNECTION OF PLUG CONNECTORS
· Make sure that connections are safe and tight.
Plug connector should not be subjected to stress
from the exterior. Connectors should only be used
to connect the circuit. They should never be used
to turn the circuit on and off.
USE OF SUITABLE MATERIALS
· Only use dedicated solar cable and suitable plugs
(wiring should be sheathed in a sunlight-resistant
conduit or, if exposed, should be sunlight-resistant
itself ) that meet local fire, building and electrical
regulations. Please ensure that all wiring is in
perfect electrical and mechanical condition.
· Installers may only use single conductor cable
listed and labeled as USE-2 or PV Wire that is 90°C
wet rated with proper insulation that is able to
withstand the maximum possible system open-
circuit voltage. Only copper conductor material
should be used. Select 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 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 plastic conduit). Avoid
exposure to direct sunlight.
· A minimum bending radius of 2.36 in (60 mm) is
required when securing the junction box cables to
the racking system.
5.2
EQUIPMENT GROUNDING
· A module with exposed conductive parts is only
considered to comply with UL1703 only when it
is electrically grounded in accordance with both
the instructions presented below and the require-
ments of the National Electrical Code.
· Modules must be grounded, and module installa-
tion must comply with all local electrical codes and
regulations.
· Grounding connections should be installed by a
qualied electrician.
· Any grounding means used with Canadian Solar
Inc. modules should be NRTL certied to UL467
and UL2703 standards. Please consult your sales
representative for formal approval process.
· Connect module frames to together using suita-
ble grounding conductor. Holes provided for this
purpose are identied with a grounding symbol.
· Use 6-12 AWG (4-14 mm2) copper wire only. All
bolts, nuts, at washers, lock washers and other
relevant hardware should be made of stainless
steel, unless otherwise specied.
· All conductive connection junctions must be rmly
xed. Metal containing iron in the conductive
connection should be made with stainless steel
or be treated against corrosion by anodizing,
spray-painting, or galvanization to prevent rusting
and corrosion.
· Canadian Solar Inc. does not provide grounding
hardware.
· One grounding method approved by North-
American certication bodies is recommended for
Canadian Solar modules, 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.