GB/T 21714.4-2008

This standard specifies design, installation, and maintenance requirements for surge protection measures (SPMs) to safeguard electrical and electronic systems within structures against lightning electromagnetic impulses (LEMP). It is applied in the engineering of buildings housing sensitive equipment, such as data centers, telecommunications facilities, industrial control systems, and medical electronics, to ensure operational continuity and prevent damage from induced surges. The standard is used by electrical engineers, system integrators, and facility managers during the planning and implementation of internal lightning protection zones (LPZs) and coordinated surge protective devices (SPDs).