In article , "Smarty" wrote:
Basic Electricity 101: current flows in a circuit, and needs to return back
to the source (in this case let's call it a breaker box) along a 10 gauge
wire as well. Thus, by "clamping" red and black together you get a heavier
conductor only in one direction (from the breaker box to the load) but still
have a light conductor in the return path.

Right so far...

You would need to start with 12/4
and "clamp" 2 pairs together to do what you want.

But that's a violation of the National Electrical Code.

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Regards,
Doug Miller (alphageek at milmac dot com)

It's time to throw all their damned tea in the harbor again.