POWER CABLE CSA FORMULA
S= ∑ i x L
∆U x K
Where,
S =Cross Sectional area (mmsq)
∑i=Total Current (A)
L=Loop Length (m)
∆U=Voltage Drop (volt)
K=Constant, 57 for copper & 34 for Aluminum
Consider that the average loop length(Twice the length between power
source and Equipment) is around 25 meters, the CSA of the power cable
should be
S=
45x25
0.9x57
=21.92mmsq,where 0.9 is Voltage drop