Busduct plug-in Fused Disconnect on one floor to feed a transformer on another floor?

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tx2step

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12 story office building - Is there any code requirement that would prevent installing a busduct plug-in 60A 480V fusible disconnnect on the 4th floor to feed the primary of a dry transformer on the 5th floor? I don't know of anything that would prevent doing this, but want to see if anyone knows of something before doing the work.

It would be much better if it could be done on the same floor, but all of the busduct plug openings on that floor are already filled, except one that would require the plug-in disconnect to be mounted upside down, which would violate 404.7.

The plug-bus is a riser running vertically 1st floor through 12 floor. The 60A bus plug can only be installed vertically - one side of the bus would let it be mounted vertically normal, but all of those holes are already filled. The openings on the other (back) side of the bus would require the bus plug to be mounted inverted (upside down), so the handle would be up=off and down=on. That orientation would not meet 404.7.
 
I agree with Tim, we install them like that all of the time. Just make sure that they're marked to indicate where the source is.
 
tx2step said:
The openings on the other (back) side of the bus would require the bus plug to be mounted inverted (upside down), so the handle would be up=off and down=on. That orientation would not meet 404.7.
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Take a look at exception 2 to that article.

I was involved recently in the periphery of a disagreement in which the inspector would not allow the down=on installation because the paperwork from the manufacturer seemed to imply that the listing required it to be up=on. The resolution required the factory to revise the documentation and to have the bus plug field-inspected and relabeled.

 
charlie b said:
Take a look at exception 2 to that article.

I was involved recently in the periphery of a disagreement in which the inspector would not allow the down=on installation because the paperwork from the manufacturer seemed to imply that the listing required it to be up=on. The resolution required the factory to revise the documentation and to have the bus plug field-inspected and relabeled.

Click to expand...

These are not center pivot handles, so exception 2 wouldn't apply, right? They are single throw handles, like standard wall mount type fusible disconnect switches. In this case I think 404.7 would require up=on and down=off.

In the 2012 Handbook, the commentary makes it pretty clear that exception 2 is intended for horizontal bus plugs, where you would pull either end of the center pivot operating handle "down" for both on and off operations.

Thanks!
 
tx2step said:
These are not center pivot handles, so exception 2 wouldn't apply, right? They are single throw handles, like standard wall mount type fusible disconnect switches. In this case I think 404.7 would require up=on and down=off.

In the 2012 Handbook, the commentary makes it pretty clear that exception 2 is intended for horizontal bus plugs, where you would pull either end of the center pivot operating handle "down" for both on and off operations.

Thanks!
Click to expand...

I don't see where in the exception that it limits it to horizontal buss only and excluded vertical.
I checked the handbook commentary in the 2011 and 2014.
 
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