[BC] Just what YOU need!

[RichardBJohnson at comcast.net]

>From what I've seen the tubular ones are water-cooled for low voltage (12.5 kV). Higher voltages are oil cooled.
BTW, there is a Lorentz force associated with all currents in conductors that tends to increase the current flow near the surface. However, it has a dimension of ampere-seconds, so at 60 Hz the force is much lower than at, say, 100 MHz --basically inconsequential, but still there.

Cheers,
Richard B. Johnson
Book: http://www.AbominableFirebug.com/

----- Original Message -----
From: "Ron Nott" <ron at nottltd.com>

That is the best skin effect and the more skin the better!  However, the 
poor clods who design power plants think that there is skin effect at 60 Hz, 
so the busses from the generators to the transformers are tubular.  But what 
do they know?
ron