Re posting without joe s advertisement joe jrl electric supply said.
Zinsco circuit breaker cross reference.
The home reference book.
Here we provide text labels and equipment photographs used to help identify sylvania electrical panels and circuit breakers.
Sylvania non zinsco circuit breaker electrical panel identification guide.
Below is a close up of the bus connection end of a classic zinsco circuit breaker showing the difference between these devices.
These panels and circuit breakers are in our opinion unsafe and should be replaced.
Gte sylvania zinsco electrical panels and circuit breakers use a thin vertical bus bar and deep slots into the connecting circuit breaker to form a connection that corrodes arc burns overheats and is unreliable.
Photo of a recent gte sylvania zinsco circuit breaker burn up courtesy of jeff weissman.
There are charts that show what circuit breakers are interchangeable.
These electrical panels do not use the zinsco or gte sylvania zinsco electrical panel bus and breaker design.
If you are speaking of the original magnatrip zinsco circuit breakers the body has always been black unless it is the current replacement that is grey manufactured by ubi.
On 2017 10 08 by mod magnatrip zinsco circuit breaker body has always been black.