What are the Regulations and Standards that Apply to SPDs?

There are seven industry standards that apply to surge protective devices (SPDs), whether they are connected to the electrical system through a plug-in connection or hard-wired connection to the facility wiring. 

Click on a standard or guide below to learn more:

• IEEE C62.41-1991
• IEEE C62.45-1992
• IEEE C62.48-1995
• NEMA LS 1-1992 (R2000)
• UL 1449 Second Edition
• NFPA 70 (NEC^® 2002) Article 285

Safety-Related Information

All AC power SPD’s should be UL 1449 Listed or Recognized and installed on the load side of the main disconnecting device. Non – UL approved devices may create a fire or personal safety hazard. Most commercial SPDs are hard wired to the facility electrical system. 

The primary function of the SPD is to eliminate short duration voltage spikes by diverting the excess voltage to ground. A requirement for a good performing SPD is to install the device with a low resistance path to ground. 

Without a low resistance path to ground, the surge may go through an undesirable path inside expensive electronic equipment. The surge may also cause the SPD to overheat and fail prematurely. SPDs should be installed in accordance with the manufacturers installation instructions. These installation instructions should detail what size conductors to use and if the unit must be installed with an over-current device such as a fuse or breaker. If the installation instructions are not followed a hazardous condition may be created. 

TOP 

<< BACK: For installers, contractors, & builders