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Thursday, June 29, 2017
Question:
Re: CQD answer published Friday, June 23, 2017 -Flexible Cords Above Ceilings
Hi, I have followed this topic for a long time. No one seems to have a solution to the problem whether it be about how to power an overhead projector being powered with an attached power cord or the subject of the question on 6/23/2017.
Given that there is a need for a condensate pump in a drop ceiling where I assume there is a condensing unit for air conditioning. Now I could remove the existing cord from the pump and direct wire it with an ac cable or greenfield approved for use in that space, but I would be causing another problem by changing the way the pump was constructed with an attachment cord. I would contend that the change would probably void the pump's UL certification; this sort of change is not allowed in many other cases so I feel it is not allowed here in this case either.
So the electrician has a dilemma and there still seems to be no clear answer or clear way to accomplish the installation.
I question the reason to NOT allow a cord connected device made to be installed in a ceiling to have an outlet installed and be plugged in to it for the device. Why do we create this problem in the first place? Is there no correct way to make this installation known to the contractor installing the air handling system? Yes I know there is the problem, but no one seems to come up with a solution.
Ken Lynes
A
Answer:
Hey Ken thanks for your follow up question. Historically flexible cords have been restricted from being located above suspended ceilings as stated in 400.12(5). They are not visible and are subject to physical damage that would typically not be noticed. I believe condensate pumps are available that are designed to be connected to a wiring method that is suitable for use above suspended ceilings.
For overhead projectors a receptacle outlet can be installed flush with the ceiling with the receptacle facing down and the projector power supply cord will be entirely below the ceiling.