DC and AC Wiring for Multiple Inverters

DC and AC Wiring for Multiple Inverters

DC and AC wiring for multiple inverters is illustrated in Figure 3-10.

If there will be more than one PV array, label the positive and negative wire pairs appropriately (for example: PV1 POS, PV1 NEG, PV1 GND, PV2 POS, etc.).

If required by the AHJ, a DC grounding conductor may be connected to each inverter’s ground bar. One inverter will connect to a common grounding conductor. The other inverters will use tap connectors. Connection is then made to the DC or AC grounding electrode as per NEC 690.47.

Ensure all connections are correctly wired and properly torqued to a maximum 16 in-lb (1.8 Nm).

PV Array #2 (PV2)

+

+

 

–

–

PV Array #1 (PV1)

Utility Meter

L1 L2 N G

L1 L2 N G

L 1

L 2

Neutral

L1

L2

L1

L2

Ground

Main Utility Service Panel

Grounding not shown.

Figure 3-10DC and AC Wiring With Multiple GT Inverters

975-0320-01-01

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