.-(1) Every tank or other receptacle for the storage of petroleum in bulk, other than a well head tank or tanks of less than 50,000 litres capacity containing petroleum Class C shall be electrically connected with the earth in an efficient manner by not less than two separate and distinct connections placed at the opposite extremities of such tank or receptacle. The roof and all metal connections of such tank or receptacle shall be in efficient electrical contact with the body of such tank or receptacle.(2)The connections and contacts required under sub-rule (1) shall have a few joints as possible. All joints shall be riveted, welded or bolted and also soldered to ensure both mechanical and electrical soundness.(3)The resistance to earth shall not exceed 7 ohms and the resistance to any part of the fitting to the earth plate or to any other part of fitting shall not exceed 2 ohms.
