I have encountered the (rare here) 240/120 Delta 3-phase service. I need to install a panel, and clean up the existing circuits.
As I read the UL "White book," breakers marked "120/240" are limited to use where the line to ground voltage does not exceed 120 volts. This presents a problem for me, as one of my service legs measures 208 volts.
I seem to recall seeing breakers that were simply marked "240." My visits to the supply house, however, were met with confusion.
A call to one company's service line resulted in the person there giving information contrary to what is in the UL white book.
Has anyone out there seen "240 volt" breakers in Square D, Siemans, or GE? Part numbers are appreciated- especially for any single pole breakers!
(I happen to be serving 208 volt rated equipment, so the ability to use a single pole breaker would be nice! As you might guess, I do n ot wish to spend the $$$$, and use the larger breakers, designed for 480 volt service).
