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southern MN | https://www.alliantenergy.com/wcm/groups/wcm_internet/@int/documents...
You probably aren't interested in the whole 230 pages of rules they have on the service lines. (This PDF is huge, takes a while to download....)
Page 56 deals with grain bins. It looks complicated. I don't know that this is current, or applies everywhere, but it seems to reference an nec code.
Paul
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Attachments ---------------- image.jpg (57KB - 157 downloads) image.jpg (56KB - 169 downloads)
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