National Electrical Code (NEC) Requirements for Surge Protective DevicesSeptember 11, 2018
In the United States, The National Electrical Code® (NEC®) sets forth installation requirements for electrical systems and equipment, including Surge Protective Devices (SPDs). The NEC provides guidance regarding where SPDs should and should not be used and how they may be installed in electrical power distribution systems.
Triennial revisions to the NEC make it important to track the editions of the code that is in effect for a project location. The NEC articles referenced herein constitute the bulk of requirements regarding the location and use of SPD in power distribution system. A look-up table summarizing key SPD-related NEC requirements is provided as follows.
|Key 2017 NEC Surge Protection Provisions|
|285||Surge Protective Devices||285.4, 285.6, 285.12, 285.3, 285.7|
|517||Healthcare Facilities||517.2, 517.26|
|700||Emergency Systems||700.1, 700.8|
|708||Critical Operations Power Systems||708.2, 708.10(D), 708.14(4)|