like, what's your phase? [RE-wrenches]

[Bob-O Schultze, Electron Connection]

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Marco,
Right as rain. So is the fact that power flows from negative to 
positive, not the other way around. And that the rest of the planet 
thinks we're totally bonkers to ground a perfectly good current 
carrying conductor. Inches, feet, and yards in 2005? Oh please. Shall 
we go on?
Best, bob-O
On May 11, 2005, at 12:21 PM, Marco Mangelsdorf wrote:
> A basic Electricity 101 question: why is "single phase" three-wire 
> (two hots
> and a neutral) 120/240VAC called single phase?  Aren't there actually 
> two
> phases 180 degrees opposite of each other?  I mean, I can clearly 
> understand
> why three-phase power is called three phase with each phase, at least 
> in the
> U.S., 120 degrees out-of-phase with each other with no congruence of 
> the
> phases at the zero crossing.  Why then isn't "single phase" actually 
> called
> two phase?  (And yes, I know that "single phase" is also referred to as
> "split phase."  The word "split" implies two, right?
>
> And if, in fact, "single phase" power is single phase, then what's two 
> phase
> power?  I read in the American Electricians' Handbook over the weekend
> references to "two phase power."
>
> I'm confused...
>
> Marco Mangelsdorf
> President
> ProVision Technologies, Inc.
> 69 Railroad Avenue, Suite A-7
> Hilo, Hawaii 96720 USA
> (808) 969-3281, fax 934-7462
> www.provisiontechnologies.com

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