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3-1/2" conduit

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  1. General Electrical Discussion
    I have, and its sometimes caught me off guard, run into more and more 3-1/2" 1980s vintage conduit. I can't remember that size being so popular back then. Is there really such a need for this size? Has anyone here specified or thought it would be a good idea to use 3-1/2"? if so, under what...
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