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Wednesday, October 26, 2016
Question:
NEC Article 501.135 Utilization equipment. (B)(1) Exception to (2): Does this mean that heat trace cable labeled for C1D2 cannot be used in C1D1 area? Is each cable specific to the Division as labeled?
Ed Welsh
A
Answer:
Hey Ed thanks for your question. Utilization equipment used in Class 1 Division 1 locations must be identified for that location as stated in 501.135(A). There is a big difference between a Division 1 location, where an explosion possibility can exist under normal conditions and a Division 2 location where the explosion possibility is not likely to be normally present.