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2. The choice of the electric cable
The choice of the electric cable depends on the allowable current of the cable and the
distance between the load and the generator. And the cable section should be big
enough.
If the current in the cable is bigger than the allowable current, it will become over hot
and the cable will be burnt. If the cable is long and thin, the input voltage of the
electric appliance will be not enough, causing that the generator doesn't start.
In the following formula, you can calculate the value of the potential "e".
Potential value
Specific resistance of copper ρ [20℃]（Ω·mm
2
/m）=0.0175
Voltage drop e =ρ（specific resistance）× ×I（Rated current）
e 5m 10m 20m 30m 40m 50m
2.5mm
2
0.427V 0.854V 1.708V 2.562V 3.416V 4.270V 230V
12.2A
IG3000
4.0mm
2
0.267V 0.534V 1.068V 1.601V 2.135V 2.669V
4.0mm
2
0.381V 0.761V 1.523V 2.284V 3.045V 3.806V 230V
17.4A
IG4000
6.0mm2 0.254V 0.508V 1.015V 1.523V 2.030V 2.538V
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