3 INSTALLATION
3.2.1 DC Cable Size
The tables below give the recommended cable/conductor cross-sectional area (mm²), and
recommended B & S size for a required current across a particular distance. In this case the
distance is between the battery and the inverter. It is recommended to choose a cable size
close to but larger than required.
NOTE: the cable cross-sectional area will need to be increased, (de-rated), should the cables
be bundled with other heat generating cables, thermally insulated or subjected to high ambient
temperatures.
mm²
Amps (A)
5 102030405060708090100
Distance (m)
1 1 2 3.5 5 5 5 7.5 10 10 16 16
2 1 2 3.5 5 5 7.5 10 10 16 16 16
3 1 2.5 5 5 7.5 7.5 10 16 16 17 25
4 1 2.5 5 7.5 7.5 10 10 16 16 25 25
5 1 2.5 5 7.5 10 10 16 16 25 25 25
6 2 2.5 5 7.5 10 10 16 25 25 25 25
7 2 2.5 5 7.5 10 10 16 25 25 23 25
8 2 3.5 7.5 10 10 16 16 25 25 25 25
9 2 3.5 7.5 10 16 16 25 25 25 25 35
10 2 3.5 7.5 10 16 16 25 25 25 35 35
B&S
Amps (A)
5 102030405060708090100
Distance (m)
1 16141210101088866
2 1614121010888666
3 161410108866664
4 161410108866644
5 16141088666444
6 14141086664444
7 14141086664444
8 1412886644444
9 1412886444442
10 1412886444422
13