Xantrex Technology GT3.0 - Manual (Page 59)

Connecting the DC Wiring
975-0131-01-01 3–5
To wire the PV array to GT Inverter:
1. Install DC conduit from the PV string(s) to the GT Inverter wiring box,
through one of the knockout holes.
2. Remove the wiring box cover (see page 3–2).
3. Route the wires from the PV string(s) through the conduit and into the wiring
box.
4. Connect the DC Ground from each PV string to the GROUND bar in the
wiring box.
5. Connect the POSITIVE (+) wire from the #1 PV string to the
PV1 (+) terminal. Double check that the wire is in the proper location and
tighten the screw.
6. Connect the NEGATIVE (–) wire from the #1 PV string to the
PV1 (–) terminal.
Double check that the wire is in the proper location and
tighten the screw.
7. Repeat for the #2 PV string, if there is one. Double check that the wires are in
the proper locations and tighten the screws:
a) Connect the POSITIVE (+) wire from the #2 PV string to the
PV2 (+) terminal.
b) Connect the NEGATIVE (–) wire from the #2 PV string to the
PV2 (–) terminal.
8. Ensure all connections are correctly wired and properly torqued according to
values shown in Table 3-1.
*Use copper conductors only.
Table 3-1 Torque Values for Wires*
Wire Size Torque
AWG mm
2
in-lb Nm
14 to 10 2.5 to 6.0 35 4.0
8 10.0 40 4.5
6 25.0 45 5.1