Xantrex XW4024 230 50, Installation Manual, Page: 31 / 68

Step 4: Wiring the Inverter
975-0384-01-02 2–13
This manual for use by qualified personnel only
Battery cable
length Runs should be kept as short as practical. Length should not exceed 3 m. For
best performance, the positive and negative cables should run alongside each
other. Avoid cable loops.
Battery cable lugs Battery cables must have crimped copper compression lugs or crimped and
soldered copper compression lugs. Soldered connections alone are not
acceptable. Lugs must be rated for use with fine-stranded cable.
Overcurrent
protection For safety and compliance with regulations, battery overcurrent protection is
required. Fuses and disconnects must be sized to protect the wiring in the
system and are required to open before the wire reaches its maximum current
carrying capability.
Terminal covers Color-coded, snap-on DC terminal covers are provided to prevent accidental
contact with the terminals. Terminal covers are required for all installations. It is
also recommended that the shank of the ring terminals (cable lugs) be covered
with heat shrink or some other form of insulation.
Torque Values for the Xantrex XW Series Inverter/Charger
Important: Use only fine-stranded copper cables for battery and inverter DC
connections. Do not use coarse-stranded wire. The lack of flexibility could
damage battery and inverter terminals.
Table 2-2 Recommended Battery Cable Size Versus Length
Inverter Model Up to 1.5m (90°C wire) Up to 3 m (90°C wire)
Xantrex XW4024 230 50 120 mm
2
(#4/0 AWG) 120 mm
2
(#4/0 AWG)
Xantrex XW4548 230 50 70 mm
2
(#2/0 AWG) 120 mm
2
(#4/0 AWG)
Xantrex XW6048 230 50 120 mm
2
(#4/0 AWG) 120 mm
2
(#4/0 AWG)
Important: Your local electrical code may require both overcurrent protection
and a disconnect switch for residential and commercial electrical systems. These
items are not supplied with the inverter.
Table 2-3 Battery Cable (in conduit) to Maximum Breaker/Fuse Size
Cable Size Required
Maximum Breaker/Fuse
Size
70 mm
2
(#2/0 AWG) 175 amps
120 mm
2
(#4/0 AWG) 250 amps
Table 2-4 Torque Values for AC Wiring (AC Terminals and Ground Bar)
Wire Size Torque Value
AWG mm
2
In-lb N-m
14–10 2.5–6 35 4
8 10 40 4.5
6–4 16–25 45 5.1