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 During the construction of a building the lighting conductor was left hanging in the air by mistake. Would the lighting conductor be still effective? Explain?


They may only be usd in new constrction.  u can't use building steel as ur ground trminal (electrode) whn instlling a lighting prtction systm on an existing building. the concrte encasd electrode mst be installd near the bottm concrete foundation or footing of the building.  dis means tht it mst be a spate electrde and can't be the foundation itself.the concrete encasd electrde mst be in direct contact wid the earth nd be at least 20-ft  in length.  There are additional rules as to the copper vs. steel content of the electrode. 
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