All structure in factory area protected against direct and indirect lighting strike in accordance with the latest British Standard Code of
The lighting protector shall be of “Early Streamer Emission” system as made by Indelec of France or equivalent.
Earthing system of the lighting protection shall be separated to the electrical earthing system and shall be below of 5 hours.
Number of such preventor, type and installation shall be as recommended by the manufacture as be proposed to the Engineer for approval.
Earthing system shall be provided for turbo alternators, diesel alternators, main switch boards, MCC, and sub distribution boards using 5/8” copper and 1” x 1/8” copper strip. Copper rods to be used as electrodes which driven into the ground and interconnected with copper strips in order to obtain a station earth of below one ohm. For regularly inspection purpose some of test links and inspection pits for every connection between electrodes and earthing conductor shall be provided.
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