2. Transportation and Installation
2-8
2.4 Selecting Cable
Select a cable with sufficient diameter by considering the permissible current on the cable and the
distance from the generator to the load.
If the current flowing to the load exceeds the permissible current of the cable, resultant overheating
may burn the cable. Similarly, if the cable is too small in thickness to the length, the input voltage
to the load will fall to cause the load input power to drop, as a result, the performance of the
machine cannot be displayed.
A180888
Simplified formula to seek voltage drop or cross-sectional area of the cable from cable length and
working current. Select such a cable length and thickness so that the voltage drop will remain
within 5%.
The following tables show the relations between the cable length and the cable thickness (nominal
cross-sectional area) suited to the working current.
(Based on the condition that working voltage is 200 V, with voltage drop of 10V.)
Single-Conductor Cable
Unit: ft (m)
Length
Current
165 (50)
246 (75)
328 (100)
410 (125)
492 (150)
656 (200)
50A 8 14 22 22 30 38
Three-Conductor Cable
Unit: ft (m)
Length
Current
165 (50)
246 (75)
328 (100)
410 (125)
492 (150)
656 (200)
50A 14 14 22 22 30 38
Cable Thickness A (mm
2
)
Cable Length L (m)
Load Switch
Working
Current I (A)
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