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 Post subject: Bus Duct clearance requirements
PostPosted: Thu Sep 09, 2010 6:26 am 

Joined: Fri Jul 30, 2010 8:37 am
Posts: 4
Does anybody know what, if any, clearance requirements are necessary around buss ducts. We have one that runs along a walkway and I want to mark the flooring for aisle space and safety.


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PostPosted: Thu Sep 09, 2010 6:49 am 
Sparks Level

Joined: Mon Mar 29, 2010 11:52 am
Posts: 110
Location: Yankton SD/ Lead SD
It depends somewhat on the voltage of the busduct. For systems that operate at 600v or less use NEC article 110 section II, for greater than 600v use NEC 110 sectin III. Hope this helps.


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PostPosted: Thu Sep 09, 2010 7:20 am 

Joined: Fri Jul 30, 2010 8:37 am
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So it does fall under the same requirements as all other electrical. My next question is can the required working space be in an aisle or do they need to be seperate from eachother. If I were to come three feet from the front of the bus duct to "gaurd" the area it will not leave enough walking space in the hallway where it is running through.


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PostPosted: Thu Sep 09, 2010 8:09 am 
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Joined: Mon Mar 29, 2010 11:52 am
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Location: Yankton SD/ Lead SD
JPC9397 wrote:
So it does fall under the same requirements as all other electrical. My next question is can the required working space be in an aisle or do they need to be seperate from eachother. If I were to come three feet from the front of the bus duct to "gaurd" the area it will not leave enough walking space in the hallway where it is running through.


We have always based it on the same principles as other electrical equipment. The working space can in combination with the aisleways. You might want to, however, check with the local AHJ, (electrical inspector), to get his approval.


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