Ned Simmons wrote:

snipped

I do have a pair of 30A motor starting switches wired as
Jeff describes above to select either the rotary or static
converter. One switch is mounted upside down and a bar
between the handles prevents both from being on at the same
time.

Ned Simmons


Hey, thanks Ned! I thought I was going to get all sorts of jazz from
folks for that "interlock" suggestion.

My first thought was to recommend your "upside down" (and I presume
offset by one width.) trick, but I wasn't sure how much an upside down
disconnect switch would agitate an inspector. G

That reminds of what some critic called Laurel and Hardy...."Two minds
without a single thought.."

Jeff

--
Jeff Wisnia (W1BSV + Brass Rat '57 EE)

"My luck is so bad that if I bought a cemetery, people would stop dying."