208 volts single pole usage ?

[kwired]

No matter how you slice it, don't use the "high leg" for single phase loads; just don't. If you have a 208/240v load, use the two main legs for 240v; if you must have 208v for some equipment, use a buck transformer.

Jreaf- I tend to agree, but SDSs could fight for the title.

If you have full delta with all three sides of equal capacity, it may be desirable to utilize all three phases with certain loads to help balance the system.

You could even have say some lower capacity 240 volt heaters but several of them balanced across all three phases, maybe even on one circuit with a three pole breaker.

 

[Hv&Lv]

Apparently high legs are also seen on generators

Many of the 12 wire generators can be reconfigured.
10 wire can to a point.

https://www.power-tronics.com/help/wiring-diagrams/Terminal-Chart.pdf

 

[kwired]

Many of the 12 wire generators can be reconfigured.
10 wire can’t

And for delta, wye, as well as for 120/208, 120/240, 277/240 or 480 delta

 

[mbrooke]

Many of the 12 wire generators can be reconfigured.
10 wire can to a point.

https://www.power-tronics.com/help/wiring-diagrams/Terminal-Chart.pdf

I know, just seems odd that someone to choose the configuration. I'm guessing this powered a sewage lift station?

 

[mbrooke]

What's a generator but a rotating transformer....

True- touche!