Panel Clearances

[tetay56@yahoo.com]

I'm installing a baggage handling system at Miami International Airport. The conveyor is approximatley 24" from the concrete wall. I have a 480v 3.5 HP motor disc. switch along with 120v control boxes on this side of the wall. The airport inspector is telling me that there must be 36" clearance. I could probably agree on the switch. but not on the controls. What say you?

 

[pfalcon]

110.26(A) appears to be the reference you need to study.
The switch is actually condition 2 (backed by a concrete wall) at 480VAC and therefore 3'6" not 3'.

If what you refer to as "control boxes" are nothing more than pass-thru or terminations then they might bypass 110.26(A). If they contain fuses, relays, or other control components then 3'.

 

[tetay56@yahoo.com]

Thanks pfalcon! I just found it about 10 mins ago, so you are correct.

 

[tetay56@yahoo.com]

You are exactly right! I found it about 10 mins before you replied. Thanks pfalcon