I replaced one many years ago that was three phase. It was a 600 amp bus panel and had some 150 amp breakers supplying separate buildings on the same campus or complex but also had all the branch breakers for the central building it was located in. It ended up getting replaced with an I line panel for the larger feeders and one fed a new QO load center for the branches in the same building. Both fit in same space the original Zinsco took up.
Wow! Imagine an air compressor on that. How long would it keep going?I have one in my shop and one at the church, both rented. Notice the blades sticking out of the red black and blue plastic directly below the breakers at the top of the picture. A Zinsco 3 phase breaker will have 2 jaws at one "elevation" and one jaw at the other "elevation". Some call it the "braided bus", more visible if less breakers are installed. I'm not going to take the cover off either panel I have access to just to get a picture, I don't want to open a can of worms. The breakers you can see on ebay.
Pushmatic breaker ON/OFF indicators are relatively worse for reliability, while better for 1-Phase meters-center combos, since no other bolt-on brand makes those.
I assume you mean it does not look like the stabs would take it?
I seen many the on/off indicators that did not work so well. Breaker usually worked, or didn't work at all. Not too many were random at operating correctly like you can find with the typical flip handle we commonly see.
Just thinking about how poorly their breakers & panels held up in residential use & can't imagine them for commercial or industrial applications.
