Class 1E cables in cable trays
Class 1E cables in cable trays
(OP)
are class 1E cables required to be installed in class 1E, QA1 cable trays? Or can the cable trays be a different safety classification as long as they are supported by seismic 1 criteria requirements?
thank you
thank you





RE: Class 1E cables in cable trays
The rationale for the QA1 is so the cables would continue to do their safety function in the event of any natural phenomena, including an earthquake. The rationale for the 1E/non1E split is so a fire in a non-safety system doesn't propagate to the safety systems. However, if you're looking for a specific requirement that says "You SHALL," I'd suggest talking to your licensing folks or you could look up the code of federal regulations online.
Patricia Lougheed
A FAQ for you to consider: FAQ731-376: Eng-Tips.com Forum Policies
Translation assistance: forum1529: Translation Assistance for Engineers
RE: Class 1E cables in cable trays
My general understanding is that you are relying on the cable raceway to perform a safety function (structural integrity), so it should be similarly classified as the cable that runs it.