National Electrical Installation Standards

Standards as High as Your Own

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Monday, January 9, 2017

Question:

Good Morning Charlie,

I’m working in a building that has an Emergency Distribution Panel. A 4” Conduit on the load side contains 2 feeders, one for the elevator & one for an air conditioner. A question has come up as to whether the elevator feeder needs to be installed in a dedicated conduit, totally independent of any other feeder.

Jim Metzler

A

Answer:

Hey Jim thanks for your question. Different systems for elevators including power circuits are generally allowed in the same raceway as stated in 620.36. The NEC does not require that elevators be supplied from emergency systems but allows that as stated in 620.91. The Informational Note to the definition of Emergency Stems in 700.2 indicates that elevators may be supplied from emergency systems.

That can be required by other codes such as NFPA 101 - the Life Safety Code, building codes or other rules under certain conditions. If the elevator feeder is supplied from an emergency system it must be kept separate from non-emergency wiring as stated in 700.10(B). What seems strange in your example is that air conditioners are not usually considered emergency loads.

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