Wiring machinery from above

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MRI

MRI

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I have a customer who wants me to wire some equipment but he doesnt want conduit run accross the floor. He wants me to drop from the ceiling above (16' AFF) with a cord or flex but I dont think the inspector is going to pass it with no support for over 10'. Is there an article that covers this wiring method?
 
I don't have the code book on me, but each conduit type has a small section in the code book and in these individual sections it'll list the support requirements. I am in a very similar situation myself, although I have both hardwired and cord-and-plug equipment. It seems to me, after reading many many posts, that dropping a cord down to hardwired equipment is against code. Any vertical drops over 10', you're looking at needing rigid pipe. I've decided to drop EMT down and catch it with a vertical piece of strut mounted to the floor with a 4-hole foot. Supported at the 90 up top, I should only need about 8' of strut to catch it within the 10' support limit.
 
I so this a day or two ago.

I'm not a guru.


A chord drop is a chord drop.


support the drop (kelms)

disconnect with male female connector? go all the way to an inherent switch or breaker?


not that I have any jobs or jobs lately like this but.

to the op.......as a thought... conduit to the floor with a flange to the floor, then to seal tight. Yes even emt...........conduit in my eyes.

drop with a piece of rubber or metal...whats the difference. is the machine moving, vibrating ?????


trying to keep the post alive.
 
Br4nd0n said:
I don't have the code book on me, but each conduit type has a small section in the code book and in these individual sections it'll list the support requirements. I am in a very similar situation myself, although I have both hardwired and cord-and-plug equipment. It seems to me, after reading many many posts, that dropping a cord down to hardwired equipment is against code. Any vertical drops over 10', you're looking at needing rigid pipe. I've decided to drop EMT down and catch it with a vertical piece of strut mounted to the floor with a 4-hole foot. Supported at the 90 up top, I should only need about 8' of strut to catch it within the 10' support limit.
Click to expand...

That's how we do it. I've used 20' strut in the past as well for the taller ceilings.
 
Hard pipe from ceiling to floor

Hard pipe from ceiling to floor

I have seen this set-up in several pump rooms.


From the floor- A 4-hole plumbing flange to a 1" ridgid section( 1ft or so ) connected to a "tee" condulet. from the Tee to the motor( with flex) from the tee upto the ceiling solidly attached.

Looks better than it sounds.
 
I always drop tech cable down to machinery. The only thing I was asked to do by an inspector was to fasten a piece of jack chain to the ceiling and type rap it to the length of cable. This keeps the outer jacket from stretching.
 
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