Surge protective devices (SPDs) divert damaging voltage transients, or surges, away from electronic equipment. Designed for RESIDENTIAL APPLICATIONS, the R Series is compact in size and easy to install. Article 230.67 of the 2020 NEC requires all services supplying dwelling units to be provided with an SPD. The SPD must be a Type 1 or Type 2 SPD. Article 230.67 of the 2023 NEC EXPANDED on the 2020 requirements to dormitory units, guest rooms and guest suites of hotels and motels, and additional areas to require Type 1 or 2 surge protection