PVI 3000/4000/5000/5300
Installation and Operation Manual
22
Fig 2.3.7 Utility configurations
Connection of the AC wiring
Use the following procedure to wire the AC conductors.
Open the circuit breaker box and switch off the circuit breaker box that will be used to connect the inverter to the building.
WARNING!
Reconfirm that the circuit breaker to the grid/utility is switched OFF before connecting the power wires
from the breaker to the inverter AC terminal block.
·
Use #10 AWG to #6 AWG, 90
C (194
F) copper wire for all AC wiring connections to the PVI 3000/4000/5000/5300
inverters. You must choose the appropriate wire size based on NEC code requirements and we recommend designing not
more than 2V drop (1%) at the most. Larger conductors will be needed for longer wire runs. For example, you may need
to splice up to larger than #6AWG if a very long run such as greater than 200’ with a PVI 5300 to keep to the 2V (1%)
drop.
CAUTION!
To ensure that the total impedance of the grid plus the interconnection AC power cable shall be less
than 0.18
Ω
for PVI 3000, 0.12
Ω
for PVI 4000, 0.10
Ω
for PVI 5000, 0.09
Ω
for PVI 5300. These values
are based on a ~2VAC drop or ~1% AC loss.