[SBE] A/C 3phase vs single phase

[Bob Reite]

Unless you already have 3 phase service in the building, it's probably 
not worth the extra expense to have it installed.

Chris Hoopes wrote:

> It comes up every now and then that I am called upon to scope out new 

> air conditioning systems. I always figured with both available, that 3 

> phase was more efficient. Less current is required to start a 3 phase 

> motor. Smaller gauge wires, but more of them. But then the other day I 

> was called down on this. I wondered if advancement in A/C technology had 

> changed the fact. The way 3 phase is measured is a difficult concept, 

> peak demand. What has been your experience? Is 3 phase cheaper to 

> operate and cool with then a 2 phase system? Or is there no difference?

> 

> 

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