Wiring
975-0400-01-01
2–11
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 XW SCC wiring compartment.
No crimp-on terminals or lugs are required.
Over-current Protection
Over-current protection must be installed to protect the XW SCC from short
circuits and to provide a means of disconnecting the 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 XW SCC must be rated for 1.25 × 60 A (the maximum current
rating of the XW SCC).
PV Circuit
A PV disconnect device between the PV array and the XW SCC must be rated for
60 A.
Long-distance wire runs
If there is a significant distance between the PV array and the XW SCC or
between the XW SCC and the battery, larger wires can be used to reduce the
voltage drop and improve performance. Refer to Table 2-3.
WARNING: Equipment damage
Do not connect an array capable of delivering over 60 A I
sc
to the XW SCC. Wire sizes
larger than #6 AWG (16 mm
2
) may be used to reduce resistive losses but should not be
installed directly into the XW SCC. Use a splicer block or similar to connect wires of
different gauges together. Follow manufacturer’s recommendations for torque and
mounting.
Summary of Contents for XW-MPPT60-150
Page 1: ...XW Solar Charge Controller Owner s Manual XW MPPT60 150 ...
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Page 3: ...XW Solar Charge Controller Owner s Guide ...
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