Installation Manual and Specifications

Wiring
900-0123-01-01 Rev A 33
Wiring
IMPORTANT:
300 Vdc models require wiring rated for 90°C or greater.
Table 2 Terminal Bus Bar (TBB) Wire Size
and Torque Requirements
Conductor Size Torque Requirements
AWG mm² In-lb Nm
#14 – #10 2.5 – 4 20 2.3
#8 6 – 10 25 2.8
#6– #3 16 – 25 35 4.0
#2 35 40 4.5
#1 – 1/0 50 50 5.7
Grounding
WARNI
NG: Shock Hazard
 The unit must be connected to a permanent wiring system that is grounded
according to the IEC 60364 TN standard.
 Make sure that no more than one bond is present in the AC system at any time.
Some codes require the bond to be made at the main panel only.
 For safety, the neutral and ground conductors should be mechanically bonded.
The GS Load Center (GSLC) is equipped with a neutral-ground bond. If
bonding is required to be in another location, the bond in the GSLC may need
to be removed.
 Some generators have a neutral-ground bond. When establishing a single
bond elsewhere, it may be necessary to check for a generator bond.
WAR
N
I
NG: Shock Hazard
For all installations, the negative (–) battery conductor should be bonded to the
grounding system at only one point.
The GSLC comes equipped with a negative-
ground bond.
This bond may need to be disconnected. If the OutBack GFDI is
present, it can provide the bond. See page 34.
Figure 26 Grounding
The GSLC’s grounding terminal bus bar (TBB), which is
bonded to the GSLC chassis, is located to the lower left
of the main inverter disconnect. It accepts conductor
sizes from 1/0 to #14 AWG (50 mm down to 2.5 mm).
This TBB accepts ground connections from the Radian
inverter, FLEXmax charge controllers, the OutBack
GFDI, the Grounding Electrode Conductor (GEC) or
external earth ground, and other equipment.
See the inverter Installation Manual for recommendations
on ground conductor sizing. Once the size is determined,
see Table 2 for required torque values.
Ground TBB