Zinsco became Sylvania in the mid 1970's as GTE bought Zinsco in 1973, they had 2-lines the infamous Zinsco as shown in post #2, & Zinsco American Switch, which was the 1" that has been called "interchangeable" & when it was sold & became Challenger Electrical Equipment Corp. became the Challenger line & Zinsco panels were discontinued except for replacement breakers. (instead of dumb & dumber it was crappy & crappier)Are there listed circuit breakers for a Sylvania SB15(16-30)C?
(This is part of a 21 house project. It would be one of the only ones that the loadcenters (its a duplex) would not have to be replaced because it 1. has enough spaces & 2. has the capacity.)
The BR is OEM (UL listed) for Challenger, might be a gray area for Sylvania although Challenger is a successor product.A quick google and I came up with that panel sticker in inspectapedia:
and I think as norcal pointed out its the interchangable type breakers.
There are old posts about them on here
And you can actually use a standard BR breaker in these.Replacing GTE Sylvania Breakers!?
I need to replace (2) 3 pole 50 amp GTE Sylvania breakers and I can't find them ANYWHERE! (Not the Zinsko ones that are 6" long!) They are the type that match the popular design like GE, Murray, Siemens, Crouse Hinds, ITE, Home Line... Are there ANY breakers available today listed for...forums.mikeholt.com