On Jun 7, 11:22*am, "Ralph Mowery" wrote:
wrote in message

...

No other opinions on this? * *I was hoping someone could spell out how
the code allows this?

Look about half way down :http://www.sea.siemens.com/step/pdfs/surge_2.pdf


Thanks for pointing me in the right direction. The Siemens article
talks about NEC 280 that covers this stuff. Some googling on that
produced more good stuff.