[BC] AC Voltage Drop

[Dave Dunsmoor]

> Since 12-pulse (or 12-phase) transformers were expensive, ...

    Richard (or anyone else who would care to reply), I've asked this
question before, and now am going to have to admit to some forgetfulness:
how exactly does this 12-phase business work? Where do you get the
nomenclature "12 pulse" (or phase) from a 3 phase incoming main AC, and how
does combining 2 secondaries constitute something that can be considered to
be 12 phases?

    If I had 3-phase available in my shop, I'd see if I could rig something
up to scope it out to follow it. But, not having that available, I think
I'll have to rely on answers here, and going back to the drawing board with
a math review.

Dave Dunsmoor