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  1. Designer82

    Class 1E cables in cable trays

    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
  2. Designer82

    Class 1E power feed separation

    thank you jpankask. Great explanation. So, for example, if I have a Class 1E field instrument with Class 1E wiring/connections to a local instrument panel (also 1E) but then power wiring from that local panel to distribution panelboards which are non-Class 1E, that would pretty much make having...
  3. Designer82

    Class 1E power feed separation

    If I have a component that must receive class 1E power, how far upstream does that circuit need to be class 1E?IE, all the way to the Unit Auxiliary Transformer? thanks

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