Xantrex XW4024 230 50, Installation Manual, Page: 41 / 68

Step 4: Wiring the Inverter
975-0384-01-02 2–23
This manual for use by qualified personnel only
AC System Bonding
System Bonding Refers to connection (bonding) of one of the current-carrying
conductors of an electrical system to ground. This creates a “grounded
conductor" or "neutral" that is at ground potential, but is separate from the
equipment ground conductor. System bonding must be done in one place only to
avoid ground loops, and it must be done differently in on-grid and off-grid
systems.
System Bonding
for On-grid
Systems The Xantrex XW Inverter/Charger does not connect the neutral to ground. The AC
input neutral is already bonded to ground by the incoming utility grid system. The
installer must not connect the neutral to ground in any additional location.
The Xantrex XW Inverter/Charger does not switch or disconnect the AC neutral in
any mode of operation, so even in invert (back-up) mode, the inverter load
sub-panel neutral is bonded to ground by the utility grid system. It must not be
grounded again in the inverter load sub-panel.
System Bonding
for Off-grid
Systems • In a system without a generator, or with a generator that does not provide a
grounded neutral, the connection from neutral to ground must be made by
the installer in the inverter load sub-panel.
• In a system with a generator that provides a grounded neutral, no additional
connection from neutral to ground is needed. The installer must not connect
neutral to ground in the inverter load sub-panel.
AC Wiring to the Xantrex XW Inverter/Charger
Make sure the AC system, including the Xantrex XW Inverter/Charger and
generator, is correctly grounded according to local electrical codes. See “AC
Equipment Grounding” on page 2–21.
To connect the inverter to the inverter load sub-panel:
1. See Figure 2-14. Connect the neutral wire from the inverter panel neutral bus
to the N-LOAD terminal on the inverter.
2. Connect the L (LIVE) wire from the input terminal on the inverter panel to the
AC Load (L-LOAD) terminal on the inverter.
WARNING: Fire and Shock Hazard and Risk of
Equipment Damage
Verify that only one neutral-to-ground bond exists in the system. Having more
than one neutral-to-ground bond in a system violates local electrical codes, may
create a shock or fire hazard, and may cause some sensitive equipment to
malfunction.
WARNING: Shock Hazard
Before making any electrical connections, make sure all AC and DC disconnect
devices are in the OPEN (disconnect) position.