The National Electrical Code (NEC) requirements for overvoltage protection can be found in Art. 242. This Article is new with the 2020 NEC, and it replaces Art. 280 and Art. 285. Those Articles ...
(A) Surge-protective Device. All services suppling dwelling units must be provided with a surge protective device. (B) Location. The surge-protective device must be an integral part of the service ...
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