how many size of electric cable, who used in Building & how
measurment this material ?
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Answer Posted / ratheesh
Types of wires:
7/20 , 3/20 & 1/18 wires types are there.
Nominal C/s area in mm:
This is for three phase connection
Main cabinet to DB box 7/20 = 7/.914mm
DB box to Geyser 7/20 = 7/.914mm
DB box to AC point 7/20 = 7/.914mm
Main cabinet to EB box earth wire 3/20 = 3/.914mm
Switch board to individual points 1/18 = 1/1.12mm
This is for single phase connection
Main cabinet to DB box 7/20 = 4mm
DB box to Geyser 7/20 = 7/.914mm
DB box to AC point 7/20 = 7/.914mm
Main cabinet to EB box earth wire 1/18 = 1/1.12mm
Switch board to individual points 1/18 = 1/1.12mm
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