engineering recuitment PSTCL ALM (Assistant Lineman) 2021 Mock Test Physics Current, Resistance and Electricity Current Density
Consider the following statements, which of the following is true about the earth wire
1
It is red colour and provides current to electrical appliances at home
2
Black in colour and transport excess of current in the household supply to power lines
3
Blue in colour and transport excess of current to earth and protect the equipments
4
Green in colour and by passes excess of current in the household circuit to protect the appliances