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

[Todd Cory, Mt. Shasta Energy Services]

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So why the heck do they call this single phase since it is split voltage 120/240
created with two phases.

I think of single phase as two wires with one only voltage and one phase available.
Most homes in the US are wired with 120/240.

Todd



i2p at aol.com wrote:

> Drake
> Hi Drake, this is how I think of it.
>
> Considering a 120/240 setup, we can think of it as two 120 vac phases (180
> deg out of phase). Since they are out of phase we can represent them as V1=120
> sinwt and
> V2=(-)120 sinwt. The voltage difference (V1-V2)= 240 sin wt (remember the
> minus a minus from algerbra = a positive). Now the difference (as measured from
> L1 to L2) is single phase 240 vac. It is derived from two 120 vac " phases".
> sharing a common neutral ( center tap of the service).
>
> Don

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