Dc wiring, Installation – Outback Power Systems GS8048 Installation Manual User Manual
Page 27
Installation
25
DC Wiring
CAUTION: Equipment Damage
Never reverse the polarity of the battery cables. Always ensure correct polarity.
CAUTION: Fire Hazard
Always install a circuit breaker or overcurrent device on each DC positive
conductor to protect the DC system.
IMPORTANT:
The DC terminals must be encased in an enclosure to meet NEC requirements.
Table 4 DC Conductor Size and Torque Requirements
Inverter Nominal DC Amps
(Minimum, per breaker)
(Derated 125%)
Conductor Size
(Minimum, per breaker)
Breaker
Size
GS8048
104
2/0 AWG (0.105 in²) or 70 mm²
175 Adc
Terminal Location
Torque Requirements
Inverter DC Terminals
60 in-lb (6.9 Nm)
Battery Terminals
See battery manufacturer’s recommendations
Figure 14 DC Cable Hardware (underside of inverter)
CAUTION: Fire Hazard
Never install extra washers or hardware between the mounting surface and the
battery cable lug. The decreased surface area can build up heat.
When installing DC cables:
Make certain DC circuit breakers are turned to the off position, or fuses are removed, before proceeding.
Battery positive and negative cables should be no longer than 10 feet (3 meters) each, to minimize voltage loss and
other effects.
Note information in Table 4, but refer to NEC or applicable codes for absolute cable size recommendations.
The modular construction of the Radian requires the use of two DC circuit breakers or fuses.
The cables for each overcurrent device must
each be sized appropriately. Alternately, a single cable or bus may be
used if sized to the minimum total ampacity.
The cables listed above are for each inverter in a system. In a system with multiple inverters, each inverter requires
its own cables and overcurrent devices of the size indicated.
Install all overcurrent devices on the positive cable.
Battery
Cable Lug
Flat Washer
M8-1.25 Hex Bolt
Mounting
Surface
Lock Washer
Tie, tape, or twist positive and negative cables together to
reduce self-inductance. Run positive and negative cables
through the same knockouts and conduit.
The inverter’s battery terminal is a threaded hole which
accepts a hex bolt (provided). Install battery cable lug,
washers, and bolt in the order illustrated. The battery
cable lug must be the first item installed. It must make
solid contact with the surface. It should have a 5/16 inch
(0.79 cm) diameter hole.