It is a common practice to send out two hots and one neutral provided 
the two hots are not on the same phase. This is a copper saving thing....

On 1/1/2016 7:34 PM, John Dammeyer wrote:
> Isn't it commonly called Split Phase in North America?
>
> Draw 15A on each side of the 120-0-120 VAC circuit and measure that with a
> clamp on ammeter and you get 15A on each leg.  Put the clamp on meter on the
> white wire (the neutral return)  and you get 0A. In effect the two phases
> are 180 degrees out of phase.  If it weren't so you'd have to make the white
> neutral wire handle twice the current of the black (and/or  red) hot wires.
>
> John Dammeyer
>
>
>> In the USA, Kirk is 100% correct.  Two phase means 90 degree phase
>> shift, and is pretty much non-existent.  120V-0V-120V with 240V from
>> end to end is "single phase".  Call it two-phase and people in the States
>> will look at you funny.
>>
>> John Kasunich
>>
>>
>>
>>
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