The 2023 update to the the National Electrical Code now requires Surge Protection Devices.
Understanding the 2023 NEC Rules for Surge Protection.
Understanding NEC 2023 Requirements for Surge Protection
In NEC 2023, the code language of Section 230.67(A) was updated to further define “dwelling units”, now reading:
230.67(A) Surge-Protective Device. All services supplying the following occupancies shall be provided with a surge-protective device (SPD):
(1) Dwelling units
(2) Dormitory units
(3) Guest rooms and guest suites of hotels and motels
(4) Areas of nursing homes and limited-care facilities used exclusively as patient sleeping rooms
. . .