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NESC Approved TIA on Table 410-2

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stevenal

Electrical
Aug 20, 2001
3,859
Confirmed it with ArcPro at a sampling of data points.
 
So I still don't get the logic of subtracting twice the assumed gap from the Minimum Approach Distance to get the working distance. I could see subtracting the gap, but why twice the gap?

 
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