NEC & history

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nafis

Senior Member
Location
Palestine,tx
Hi there
I have been always wondering about the history of NEC numbers and percentage where they came from. I knew it came from some calculation and testing. I want to learn more about that can any body tell me where to start. awhile ago I read EC&M article about the %125 I just searched but no place to be found .
Thanks folks any advice thought greatly appreciated
 
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