450.3(A) or (B)

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I am confused. For "over 1000 volts" and "1000 volts or less" do they mean just the primary voltage or either? Consider a 240V to 2400V step up transformer. Which chart do I reference for over-current protection requirements? I would say (A) except it states "primary protection over 1000 volts" as the only option on the primary side.....
 
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