There are several sources of power surges. They can originate from the electrical utility company during power grid switching, to inside the home when large appliance motors turn on and off.
*Does not protect against direct strikes
The Surge Protective Device type (SPD) refers to the location of where the SPD can be used or installed.
SPDs rated Type 1 and 2 are placed here to suppress a large percentage of the initial event.
SPDs rated Type 2 and 3 are placed here to further reduce the voltage let-through from Stage 1.
Every three years, members of the National Fire Protection Association (NFPA) meet to review, modify and add new National Electrical Code (NEC), or NFPA 70, requirements to enhance electrical safety in the workplace and the home.
The NFPA 70, National Electrical Code, creates the foundation for electrical safety. The updated 2020 version of this reliable code echoes the evolution of the industry, resulting in several updates and four new articles related to the pressing issues of emergency disconnects, ground fault circuit interrupters, surge protection, arc energy reduction and more.
Learn more about electrical safety and the NEC 2020 code
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NEC 2020 service entrance & surge protection code updates
Code-compliant surge protection
Download our NEC 2020 brochure to learn more about surge protection