Spinup exam 3, # 66

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Redskinsdb21

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It asks for smallest copper conductor size allowed on a surge protector device, refers me to article 280.23..then gives the answe as 6 awg, I dont think this is correct, in article 230.26 it says line and grounding conductors shouldnt be any smaller than 14 awg...are they wrong in the book with answering 6 awg? or am i missing something?

 
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