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I think on Harbor Freight, the way to go is find a coupon, and get some dollars off... Those prices sound about what I noticed when I was there. More than I'd be willing to pay at this point. I do have two high current contactors (three phase/three contacts) that I may use for a transfer switch...

Our favorite cheap Chinese stuff store has one: Harbor Freight! I looked at it the other day when I was in with a friend, seemed reasonably well built--did not notice if it had a UL sticker or not (I should have looked, but the Chinese will put fake UL stickers on their fake stuff...) It was...

And as well, there is nothing to prevent breakers at both ends, which would allow smaller wire sizes, more suitable to the application. As mentioned, the 200 amp transfer swtich requirement is only for automatic switch over systems, and there are some major other requirements (including the...

All very good points... An easily accessible site for some wire info is American wire gauge - Wikipedia, the free encyclopedia though those number must be de-rated as the conductors are not single but multiple. One should consider just how much current they are drawing (or want to draw) and just...

IMHO, (such as it is) you'd probably be OK with 8 AWG for 75 ft. One thing to check is the temperature rating of the wire, if 90c or below, the size is very close to the maximum. If over 90c, then you are in better shape. Of course, for initial runs, carefully monitor the wire's temperature (it...