Wiring
900-0123-01-00 Rev
A
33
AC Wiring
WARNING: Shock Hazard
Ensure all circuit breakers or disconnect devices are turned off or disconnected before
wiring. Make certain the inverter and other active devices are turned off or disabled
before wiring.
The GSLC can have multiple terminal bus bars for multiple AC connections. Because the Radian
inverter possesses two sets of AC input connections and one set of output connections, up to three
TBB sets are available. Each set of bus bars are paired in red and black, for the 120/240 Vac
connections required by the Radian inverter.
The TBB set on the left is generally used for the inverter’s AC output connections. The central TBB set
is for utility grid connections and the right TBB set is for a generator. The preassembled GSLC models
follow this convention.
Each TBB accepts conductors from 1/0 (70 mm
2
) to #14 AWG (2.5 mm
2
). See Table 3 on page 27 for
required torque values.
If steps are inappropriate for a given system (such as instructions for a generator when none is
present), they can be ignored.
Figure
28
AC Terminal Bus Bars
AC Output
Grid Generator Neutral
To make the external AC connections to
the GSLC:
1.
Connect the L1 wire from the AC load
panel to the black TBB on the left
(AC Output). Connect the L2 wire from
the AC load panel to the red TBB on
the left.
2.
Connect the neutral wire from the AC
load panel to the neutral TBB.
3.
Connect the L1 wire from the utility grid
panel (if present) to the black TBB in the
center (Grid). Connect the L2 wire from
the utility grid panel to the red TBB in the
center (Grid).
4.
Connect the neutral wire from the utility
grid panel (if present) to the neutral TBB.
5.
Connect the L1 wire from the generator
(if present) to the black TBB on the right
(Generator). Connect the L2 wire from
the generator to the red TBB on the right
(Generator).
6.
Connect the neutral wire from the
generator (if present) to the neutral TBB.
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