Switching silver to copper for 130 meters will cost u approx 15k.
Before doing changing wire ask wapda line man(give him chai pani) to change ur service wire to some other main wire.i have 3 phase meter installed at my home and all 3 lines has different volts,1 line has 240 volts 2nd 215-220 and 3rd 190.
May be ur service line is attached to highest load bearing wire.
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