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Friday, July 5, 2019
Question:
Can you mix control wires with 480 volt motor load wires in the same conduit or trouffe
Gene Capalbo
A
Answer:
Hey Gene thanks for your question. Yes, if they are Class 1 Circuits as defined in 725.2 such as 120 volt control circuits. All conductors must have an insulation voltage rating for the maximum voltage applied of any of the conductors as stated in 300.3(C)(1). Informational Note No. 1 to that section refers to 725.136(A) which prohibits Class 2 and Class 3 circuits in the same raceway with power circuit conductors. Class 2 and Class 3 circuits have power supplies as required by 725.121 and Class 1 circuit classification and poser supply requirements are stated in 725.41.