Schneider Electric Xantrex XW Guía de instalación Pagina 105

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Wiring
975-0239-01-01 4–13
This manual for use by qualified personnel only
Current Rating
The Xantrex XW SCC PV input is rated for 60 A maximum I
sc
. Since PV outputs
can vary due to the array size or sunlight angle, the safe minimum wire size must
be chosen for maximum array short-circuit current. Consult PV array
manufacturer specifications.
Minimum Wire Gauge
For installations where the PV array output is the maximum allowable 60 A I
sc
, the
minimum allowable wire gauge is #6 AWG (16 mm
2
) copper wire with a 90 °C
(194 °F) insulation rating. This wire gauge is determined by electrical code
requirements regarding conduit knockout sizes, wire bending radius, and space
available within the Xantrex XW SCC wiring compartment.
No crimp-on terminals or lugs are required.
Over-current Protection
Over-current protection must be installed to protect the Xantrex XW SCC from short
circuits and to provide a means of disconnecting the Xantrex XW SCC. Consult
local electrical codes to establish the correct fuse or circuit breaker rating.
Battery Circuit The NEC requires the battery circuit to be protected with a
device rated for 125% of the rating of the circuit. The DC-rated fuse or circuit
breaker between the battery and the Xantrex XW SCC must be rated for
1.25 × 60 A (the maximum current rating of the Xantrex XW SCC).
PV Circuit A PV disconnect device between the PV array and the Xantrex XW
SCC must be rated for 60 A.
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