why do chimney made of steel not required lightning conductor
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To protect a steel industrial chimney against lightning, do we need to install a lightning rod at the top of chimney and use a down conductor and ground it or is it sufficient to connect the grounded earth electrodes to the chimney from the bottom i.e. let the steel chimney act as the conductor?
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A steel chimney is conductive and likely tied to ground in the building foundation, though it is standard practice to bond all metallic components on a roof to a common loop conductor that is grounded in any lightning protection system. ... This causes a potential electrical hazard during a lightning storm.
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