equivalent load carrying

jmmmmSeptember 21, 2013

I'm running #8 wire out to my 110V, 19 amp lakeside pump (per manufacture recommendation based on the distance from box to pump). Rather than hard wire the pump, I'd like to use a 20 amp GFI and plug. The GFI will accept two #12 wires line wires. Will two #12 carry the equivalent load of the one #8? Is it better to 'unravel' the #8 and split it into two and attaching each to the GFI?

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Ron Natalie

If the manufacturer recommends #8 there is most likely good reason. Motors frequently are not happy with the voltage drop that smaller conductors over longer distances will bring. #12 and a 20A circuit is marginal for something that claims to draw 19A. I can almost guarantee you're going to trip the breaker from time to time. What circuit rating does the manufacturer recommend?

No you CAN NOT parallel #12.
No you can not "unravel" the #8. If the plug or terminal won't accept wire that large, you're going to have to make a connection using some listed means (they do make wire nuts that large, for example) to join to a wire that fits.

    Bookmark   September 22, 2013 at 8:57AM
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