Rule 48
Minimum Distance From Ground To The Electric Wire
– (1) Distance  between the electric wire of different volts of the distribution and  transmission system and the ground shall not be less than as prescribed in  Schedule-12.
(2) In case where electric line is to be installed by the side of the  road or along it, it shall be done by adopting appropriate technological  measures.
(3) If it is necessary to install electric line of more than 33,000  volts, it shall have to be done by adding 0.305 meter for each 33,000 volts on  the distance as prescribed for 33,000 volts in Schedule-12.