"Doug Miller" wrote in message news:cb8hi.9337

#3 copper or #1 aluminum, minimum, and make sure you run four wires (2
hots,
neutral, and ground) -- but why 100A in a shed??

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Price out that #3 copper and you may find that a 30A or 60A service will
suite your needs. I have 30A 240V in my garage/shop and it handles al my
lighting and power tool needs.