5 Electrical connection
23
Wiring procedure of NTX inverter
1. Disconnect the inverter from the AC Grid by
opening all AC breakers/disconnects and turn the
integrated DC disconnect OFF.
2. Carefully cover all PV modules using opaque
material. Ensure that no PV module can provide
energy during this operation.
3. Opening wiring cover of wiring zone.
4. Wiring from the AC breakers/disconnects to AC
terminals of NTX inverter.
5. Wiring from the PV wires to DC terminals of NTX
inverter.
6. Connect the signal cables.
7. Turn the integrated DC disconnect ON.
8. Turn the AC breakers/disconnects ON.
NOTE
· First turn off all AC disconnects and turn the
integrated DC disconnect ‘OFF’.
· The AC side must always be disconnected before
the DC side.
· After the NTX inverter is de-energized, discon-
nect the wiring in the reverse order from above.
5.2 Opening wiring cover of NTX inverter
1. Remove the 2 screws from the wirng cover and
pull the cover forward smoothly.
2. Put the cover, the screws to one side so that do
not get lost.
5.3 AC wiring
This section provides complete, step-by-step pro-
cedures for wiring the AC output from the NTX
inverter to the utility.
NOTE
Overvoltage may cause cable fire.
Overcurrent protection for the AC output circuit
must be provided in the electrical installation refer
to the National Electrical Code®, ANSI/NFPA 70.
NOTE
All electrical installations must be done in accor-
dance with the local codes and with the National
Electrical Code®, ANSI/NFPA 70. See national
National Electrical Code® section 690-64(b)(2).
The NTX comes from the factory pre-configured for
utility interconnection at Auto mode. The NTX may
be reconfigured for other utility mode by following
the steps bellow.
1. The output voltage setting is determined by the
LCD display.
