Is it okay to use Cutler Hammer breaker in Siemens panel?

An electrician just replaced my circuit breaker panel with Siemens panel. Most of the circuit breakers he used are Siemens. But two of them are cutler hammer. Is it okay?
Thanks,
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On Sep 10, 10:30 am, snipped-for-privacy@hotmail.com wrote:

A lot of breakers are interchangable. Yes its fine.
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Mikepier wrote:

Actually, using other than the original manufacturer's breakers voids the UL approvals and the manufacturer's warranty.
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On Tue, 11 Sep 2007 14:59:45 GMT, Inspector D

It really depends on whether this breaker was "classified" by U/L for use in that panel. C/H has taken the effort to get some of their breakers evaluated in other panels by U/L. The manufacturer of other panels, particularly Square D still does not recognize that evaluation.
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on 9/11/2007 10:59 AM Inspector D said the following:

What is the warranty on a breaker panel? What if the user replaces a UL approved manufacturer's breaker with another manufacturer's UL breaker?
--

Bill
In Hamptonburgh, NY
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Mikepier wrote:

Assuming the breakers used _are_ listed for use in the subject panel, that is.
That they may fit doesn't necessarily mean they've been qualified for the application. OP can determine whether the particular breaker is listed or not for the application by looking up the data sheet for them (or the simple expedient would have been to ask). W/O specific models, can't answer the question specifically.
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