Section 67(5) in The Indian Electricity Rules, 1956
(5)[(a)] [ Sub-R. (5) renumbered as Clause (a) thereof and Clause (b) inserted by G.S.R. 1723, dated 21.11.1977 (w.e.f. 31.12.1977).] Where the earthing lead and earth connection are used only in connection with earthing guards erected under high or extra-high voltage overhead lines where they cross a telecommunication line or a railway line, and where such lines are equipped with earth leakage relays of a type and setting approved by the Inspector, the resistance shall not exceed 25 Ohms.(b)[ Every earthing system belonging to either the supplier or the consumer shall be tested for its resistance to earth on a dry day during dry season not less than once a year. Records of such tests shall be maintained and shall be produced, if required, before the Inspector or any officer appointed to assist him and authorised under sub-rule (2) of rule 4-A.] [Sub-R. (5) renumbered as Clause (a) thereof and Clause (b) inserted by G.S.R. 1723, dated 21.11.1977 (w.e.f. 31.12.1977). ]
