Siemens and Murray are indeed the same company. The parts are physically interchangeable (and AFAICT, identical except the label), but Murray breakers are technically not certified for the Siemens panels, and thus not allowed by NEC code.Click to see full answer. In respect to this, can you use Murray breakers in a Siemens panel?Siemens panel with Murray Breakers. The Murry breakers are not listed to be used in the Siemens panel and therefore are a code violation. That said however this is many times allowed by inspectors because they fit and this is why it passed.Likewise, are Siemens breakers compatible with Eaton? The straightforward answer is: read your panel for manufacturer’s instructions on acceptable breaker replacements. Check under the Siemens column for compatible Eaton UL Classified breakers. Moreover, what breaker is compatible with Siemens? The Cutler-Hammer “CL” breakers are classified for use in a Siemens panel.Are Siemens and ITE breakers interchangeable?Siemens IS the owner of all things ITE when it comes to low voltage breakers. Their breakers are not just “compatible” with ITE, they ARE EXACTLY THE SAME breakers, they haven’t changed in 25 years or more. There is no difference other than the company name.