Installation Manual and Specifications

Installation
34 900-0123-01-01 Rev A
Bonding
All GSLC models, including those in prewired applications, are equipped with a mechanical
bond between AC
neutral
and ground.
Some models are equipped with a mechanical bond between DC
negative
and ground.
These can be useful in stand-alone systems where no other bond is provided. If other bonds
are present, or if a GFDI is installed later, the GSLC bond needs to be removed.
WARNING: Shock Hazard
If the GFDI is manually installed (see page 27 and the GFDI manual), the negative-ground
bond on the GSLC must be removed. This must also be done if any other PV ground-fault
device is present that establishes its own negative-ground bond.
NOTE:
Models equipped with a GFDI do not include the mechanical bond inside the housing, as the
GFDI provides a bond instead. The 300 Vdc models do not include an internal bond, as they
are intended to be used with charge controllers that have GFDI protection built in.
Figure 27 Removing Bonding Connections
The GSLC’s neutral bus bar is located in the
lower right portion of the GSLC. The neutral-ground
bond is established at one end of the bar, near the
base of the GSLC.
To remove either of the bond connections:
1. Using a Phillips screwdriver, remove the screw
shown above.
2. Remove the metal standoff beneath the bus bar.
The screw and bus bar provide the mechanical bond
to the chassis ground.
3. Rotate the TBB mount. Insert the bus bar into the
open end of the TBB mount so that the TBB mount
supports the bus bar. It may be necessary to loosen
the TBB mount screw before rotating it.
4. Reti
g
hten the screw to secure the TBB mount.
The GSLC’s negative (–) bus bar is located
near the top of the GSLC. It is attached to the
inverter negative (–) bus and its shunt.
NOTES:
 If the TBB is connected directly to
the enclosure by a screw, then the
bond is connected.
 If the TBB is held by the TBB mount
and the TBB mount is secured to the
enclosure, the bond is disconnected.
 The installed Neutral TBB has white
insulators. A second Neutral TBB with
blue insulators is included in the kit for
locations where blue is standard.
Screw
TBB
Mount
Neutral-Ground Bond
Negative-Ground Bond
Bottom of GSLC
Standof
f
Standof
f
Inverter
Negative (–)
Bus Bar
Top of GSLC
Screw
TBB
Mount