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Equipment supplying Class 2 or Class 3 circuits must be marked to indicate each circuit that’s a Class 2 or Class 3 circuit [725.124]. This requirement means that the power source must be marked but ...
Class 1 circuit conductors must have an insulation rating of at least 600V [Sec. 725.49(B)]. General requirements. Class 1 circuits must also comply with the general requirements of Art. 725, Part 1 ...
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