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  1. JohnB85

    12 kV Substation Grounding Question

    Hi all, I have a ground problem that I believe I have solved, just not sure how to prove it. We have installed some manual fire suppression sprinklers in a cable pulling area of a sub - basement area where XLPE cables enter sub. Sub is a 138 to 12 kv yard with 24 feeders and 3-4 transformers...

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