Section 126(3) in The Indian Electricity Rules, 1956
(3)In any oil-mine or oil-field, at any place within the Danger Areas,-(a)all [signalling, telecommunication and remote control][circuits shall be so constructed, installed, operated, protected and maintained as to be intrinsically safe; [Substituted by G.S.R. 253, dated 19.2.1981 (w.e.f. 7.3.1981). ](b)all cables shall be so constructed, installed, operated and maintained as to prevent risk of open sparking;(c)all apparatus including portable and transportable apparatus shall be flame-proof;(d)all electric lamps shall be enclosed in flame-proof enclosures.