Outback Power Systems GS4048A Installation Manual - Manual (Page 21)

Installation
900-0160-01-00 Rev A 19
Wiring
It will be necessary to remove knockouts from the chassis to run wires. Bushings are included with the
hardware kit to protect the wires. Make sure to install these bushings in the holes.
Use copper wire only. Wire must be rated at 75°C or higher.
Grounding
WARNING: Shock Hazard
 This unit meets the IEC requirements of Protection Class I.
 The unit must be connected to a permanent wiring system that is grounded
according to the IEC 60364 TN standard.
 The input and output circuits are isolated from ground. The installer is responsible
for system grounding according to all applicable codes.
 For safety, the neutral and ground conductors should be mechanically bonded.
OutBack does not bond these conductors within the inverter. 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.
 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.
WARNING: Shock Hazard
For all installations, the negative battery conductor should be bonded to the grounding
system at only one point. If the OutBack GFDI is present, it can provide the bond. (The
GSLC is also equipped with its own bond, which may need to be removed.)
IMPORTANT:
Most OutBack products are not designed for use in a positive-grounded system. If it is
necessary to build a positive-grounded system with OutBack products, contact OutBack
Technical Support at
+1.360.618.4363 before proceeding. Additionally, consult the
online forum at www.outbackpower.com/forum/, where this subject has been
discussed extensively.
Table 3 Ground Conductor Size and Torque Requirements
Terminal Location Minimum Conductor Size Torque Requirements
Ground TBB #8 AWG (0.013 in²) or 10 mm² 25 in-lb (2.8 Nm)
Figure 14 Chassis Ground TBB
The inverter’s ground terminal bus bar (TBB) may be used for
making all ground connections to other parts of the system.
Examples include inverter equipment grounding, generator
grounding, load panel grounding, and main earth ground
wire. When the GSLC is used, make a connection from the
inverter to the ground TBB in the GSLC.
This TBB accepts up to #4 AWG (0.033 in²) or 25 mm² wire.