In article 0WuSh.685$ok6.591@trnddc07, "Pop`" wrote:
Doug Miller wrote:
In article ieaSh.296$ok6.274@trnddc07,
says...
Greg O wrote:
"fireant" wrote in message
...
Want to replace current 10' cord with 25' cord.
Is 14-3 large enough?

Saw is 3 HP 220V. TIA, F


3 hp equates out to about 15 amps at 220 volts. You will be pushing
a 14 gauge cord. 12 gauge will do it just fine. 10 is over kill for
25 feet. Greg

At 220, that's only 7.5A per wire;

Wrong -- it's 15A per wire.

220 @ 15A = + = 15A.

Nope.

220V * 15A = 3300 W.

(110V * 7.5A) + (110V * 7.5A) = 825 W + 825 W = 1650 W.

110 with 15A in each phase would be a 30A ckt; 30A delivered to the load.

Absolutely false. The currents are *not* additive. Two 110V circuits in series
with 15A in each leg makes a 15A circuit at 220V. **NOT** a 30A circuit.


--
Regards,
Doug Miller (alphageek at milmac dot com)

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