At one time, the National Electrical Code (NEC) contained two Articles you won’t find as of the 2020 revision: Art. 280 (surge arrestors) and Art. 285 (transient voltage surge suppressors or TVSS).
Article 430, Part IV provides the requirements for motor branch-circuit short-circuit and ground-fault protection (the preceding Part III covers overload protection). It starts off by giving you three ...
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