ET Solar ET-P660250AC, Руководство по установке

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power. Proper safety procedures must be followed when installing or accessing the dedicated
branch circuit wiring, which includes unplugging the AC Modules from the dedicated branch
circuit.
• The AC module interconnecting cable system includes an internal equipment grounding
conductor (EGC) connected to each module through pluggable connectors with a longer
ground pin.
• The AC module does NOT require a DC or AC grounding electrode conductor (neutral) at
the inverter, and the neutral within the AC module is isolated from ground.
• The AC module must be connected to a dedicated branch circuit from an AC supply
system with the neutral referenced to ground at the building or structure electrical
service entrance.
• The connector on the AC interconnecting cables is rated for disconnect under load and
can be used as an NEC disconnect device. Some AHJs might require a separate
disconnect next to the AC module system as well as a readily accessible disconnect.
•
The AC cables and connectors are listed for outdoor use, are rated for 20A, and have
insulation rated to a minimum temperature of 90C. These cables are listed for use with
AC modules.
• The AC dedicated branch circuit wiring from the readily accessible disconnect to the AC
module array must include an equipment grounding conductor (EGC) run in the same
raceway or cable as the AC circuit conductors. This EGC must be connected to the green
colored conductor of the transition cable, which is part of the AC module interconnecting
cable system.
• The AC module interconnecting cable system provides an internal EGC for grounding the
AC modules only. Other metal structures, such as mounting systems, must be grounded
per code.
• If a module is removed from within the string, it is recommended that you bridge the
gap in the string using an AC extension cable. Inserting an extension cable maintains
ground continuity to subsequent modules in the string. See "AC Wiring Accessories" on
page 27 for a list of available extension cables. Other auxiliary grounding methods may
be used.
• The metal components of the AC module, including frame and microinverter, can reach
temperatures of approximately 80C or more under extreme environmental conditions.
To reduce risk of burns, use appropriate safety procedures when handling.
CAUTION: To reduce the risk of fire, connect only to a circuit that has a dedicated 20 amperes
maximum overcurrent protection in accordance with the National Electrical Code, ANSI/NFPA
70.