83. Clearances: General .- [(1)] For the purpose of computing the vertical clearance of an overhead line, the maximum sag of any conductor shall be calculated on the basis of the maximum sag in still air and the maximum temperature as specified by the State Government under rule 76(2)(d). Similarly, for the purpose of computing any horizontal clearance of an overhead line the maximum deflection of any conductor shall be calculated on the basis of the wind pressure specified by the State Government under rule 76(2)(a) [or may be taken as 350, whichever is greater] [ Inserted by G.S.R. 1723, dated 21.11.1977 (w.e.f. 31.12.1977).].
(2)[ No blasting for any purpose shall be done within 300 metres from the boundary of sub-station or from the high voltage or extra-high voltage electric supply lines or tower structure without the consultation of the owner of such sub-station or electric supply lines or tower structures and in case of mining lease hold area, without the written permission of the Chief Inspector of Mines or the Electrical Inspector of Mines.] [ Inserted by G.S.R. 793(E), dated 3.12.2002 (w.e.f. 4.12.2002).]
