Just so we compare apples, Let's look at it like this.
In Roger's above example, the IR losses would be cut in half. Let's call it 50%...
Now then, Roger's example is based on (4) 15a loads. Total 7200W..
The losses using 2 wire is 5%..
The losses using 3 wire is 2.5%.
So even know 50% in losses, are only really a 2.5% savings, but it is savings.
Now, let's say we use 2 wire, 10ga.
Using the same loading, 2 wire installation equates to 223W. The 12 ga was 376W.
Just being fair here, this experiment was on a 240V residential power. Not 208V 3ph.
I think we all can agree, that 3 ph power and nuetral currents, do not fit the above examples, and I think this is what the original poster was intersted in.
Good discussion....
Dnk....
