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DC WIRE GAUGE, FUSING & BATTERIES
Inverter Cable
An "Inverter Cable" kit (positive cable, negative cable, and proper fuse) is required to connect the
inverter to a battery pack. An 8-guage cable is also required to connect the inverter's bonding
lug to ground.
The inverter cable length and the size of the inverter will determine the cable gauge and the size
fuse to use. The maximum inverter cable recommended is 20-ft; it must be fused within 18-in from
the positive (+) terminal of the battery.
Cable Recommendations
1.
Use stranded copper cable.
2.
Use SGX cross-linked polyurethane insulation type that complies with the high temperature
insulation requirements (125º C) of SAE J-1127 and vehicle manufacturer requirements.
3.
Cable gauge recommendations are minimum.
applications or large motor loads, and other applications with high surge currents, use cable
gauge 1 to 2 sizes larger than recommended in Table 1.
4.
Keep the cable lengths between the battery and inverter as short as possible.
5.
UL requires that a line fuse be installed within 18 inches of the battery. Use only Bussmann
ANN type fuses to 500A and Bussmann ANL for 600A.
Cross reference the inverter model, and the estimated cable length in Table 1 to determine the
proper cable gauge and fuse size. The Inverter Cable kit may be purchased directly from Sensata
Technologies.
Table 1: Cable and Fusing Guide at 5% Voltage Drop at Full Output
Inverter
Full Load
Model
(Amps DC)
12/800N
80
12/1200N
120
12/1500N
150
12/1800N
180
12/2400N
240
12/3000N
300
12/3600N
360
*Proper cable gauge must be used to prevent excessive voltage drop at the inverter DC input
*Some motor starting may require the use of the next larger size cable
Recommended Battery Sizes & Quantities @ full hp rating
12/1800N
1 Deep Cycle
REMOTE "ON/OFF" SWITCH
An optional customer supplied remote "On/Off" switch can be connected to the remote
On/Off switch hookup lead extending from the inverter (violet wire). Use an 18-gauge cable, single
pole single throw switch, and a 5-amp in-line fuse installed within 10 inches from the positive (+)
terminal of the battery.
Fuse Size
1 ft. to 10 ft.
150A
200A
200A
300A
400A
500A
600A
12/2400N
12/3000N
2-8D
For higher than normal temperature
Inverter to Battery Estimated Cable Length in Feet
11 ft. to 15 ft.
4-gauge
4-gauge
4-gauge
2-gauge
2-gauge
1-gauge
2-gauge
1/0-gauge
1/0-gauge
2/0-gauge
2/0-gauge
4/0-gauge
4/0-gauge
4/0-gauge
12/3600N
2-8D
1 or 2-8D
5
16 ft. to 20 ft
2-gauge
1-gauge
1/0-gauge
2/0-gauge
4/0-gauge
4/0-gauge
NR
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