Grounding - CanadianSolar CS3U-P Installation Manual

CORRECT CONNECTION OF CONNECTORS
 Make sure that all connections are safe and properly
mated. The PV connector should not be subject 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.
 Connectors are not waterproof when unmated. When
installing modules, connector should be connected to
each other as soon as possible or appropriate measures
(like using connector endcaps) should be taken to avoid
moisture and dust penetrating into the connector.
 Do not clean or precondition the connectors using
lubricants or any unauthorized chemical substances.
USE OF SUITABLE MATERIALS
 Only use dedicated solar cable and suitable connectors
(wiring should be sheathed in a sunlight-resistant
conduit or, if exposed, should itself be sunlight-
resistant) 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 which is 90°C wet rated
in North America, and single conductor cable, 2.5-16
mm² (5-14 AWG), 90°C wet rated in other areas (i.e. IEC
62930 approved), with proper insulation which 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 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
EN-Rev IM/GN-AM-EN/2.71 Copyright © June, 2021. CSI Solar Co., Ltd.
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 61730 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
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
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
recommended for Canadian Solar.
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regulations. Grounding
(IEC
described below is
www.csisolar.com