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480 voltage 1

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Santaman7

Santaman7

Electrical
Joined
Aug 31, 2010
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5
Location
US
what is the min. air gap size needed to prevent 480 volt AC from arcing?
 
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Where? In clean air, dirty air, a vacuum? Phase-to-phase, phase to ground? Are you building switchgear? The specification for 480V switchgear (which implies North America) is ANSI C37, I suggest you invest in a copy if that is your job function.


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This is for a heater bank in a vacuum oven that is going through a pass through. I am talking about phase to ground and I would also like to know about phase to phase. Does ANSI C37 talk about air gaps?
 
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