Xantrex GT2.8-NA-240/208 UL-05, Owner'S Manual

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Wiring the Inverter
3–2 975-0334-01-01
The ground bar accepts wires up to #4 AWG. Use wire size #12 to #4 AWG,
copper conductors only, rated 90 °C minimum. Torque ground wires as specified
in Table 3-1.
Figure 3-1 Ground Conductor Knockouts
Knockouts for ground conductors
Ground bar
Table 3-1 Torque Values for Ground Wiring
Wire Size Torque Value
AWG mm
2
in-lb Nm
12–10 4.0–6.0 25–35 3.0–4.0
8 10 30–40 3.4–4.5
6–4 16–25 35–45 4.0–5.0
Important:
In most models, the negative PV conductor is internally bonded to the
ground system within the inverter’s ground fault detection circuit. Inverter models marked
with the “-POS” suffix are positive grounded and have the positive PV conductor
internally bonded to the ground system through the inverter’s ground fault protection
circuit. It is important that the negative (or positive) PV conductor is not bonded to the
ground at any other point in the system.