Canadian Solar CS3U-MS-FG Installation Manual page 8

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Table 1: System Cable Scheme for CS3U and CS3K modules
Module types
CS3U-MS-FG, CS3U-P-FG,
CS3K-MS-FG, CS3K-P-FG
The maximum distance between two adjacent
module frames should be within 50 mm (1.96 in) for
side with mounting clamps, and within 25 mm (0.98
in) for side without mounting clamps, in order to
meet system cable scheme.
CORRECT CONNECTION OF PLUG CONNECTORS
· Make sure that all connections are safe and
properly mated. The PV 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.
· Connectors are not waterproof when unmated.
When installing modules, connector should be
connected to each other as soon as possible or
appropriate measures should be taken to avoid
moisture and dust penetrating into the connector.
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 itself be sunlight-
resistant) that meet local fire, building and electri-
cal regulations. Please ensure that all wiring is in
perfect electrical and mechanical condition.
· Installers may only use single-conductor cab-
le 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. TUV 2PfG1169 or EN50618
approved), with proper insulation which is able to
withstand the maximum possible system open-cir-
EN-Rev IM-FDM-EU/1.7 Copyright © April 2019. Canadian Solar Inc.
Standard cables
cuit voltage.
· Only copper conductor material should be used.
Select a suitable conductor gauge to minimize vol-
tage 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
· EQUIPMENT GROUNDING: double glass modules
do not present any exposed conductive parts, and
therefore do not require to be electrically groun-
ded for compliance to the North American National
Electrical Code (NEC).
· Proper equipment grounding is still required for
Optional cables
Leap-frog