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Why aren't aluminum electrodes allowed for use in grounding?

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Question added by mustafa محمد صادق السيد , Electrical Engineer , rmc
Date Posted: 2015/12/12

Al is a corossive metal...so cannot be used

Ramner Navarro
by Ramner Navarro , QA/QC Electrical Engineer , Al Arrab Contracting Company

Aluminum electrode conductors allowed cannot be in contact with earth, masonry, or subjected to corrosive conditions. When used outdoors, the termination to the electrode must not be within 18 in. of earth.

Ashfaq Jan
by Ashfaq Jan , Protection And Electrical Maintenance Engineer (1450MW power plant and 500KV switchyard) , WAPDA,Pakistan Water And Power Development Authority

for good earthing the resistance should be as low as possible and material should also be corrosion free. That's why we prefer copper due to its low resistance,.

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