June 2018 (1)
6/11/2018
UL 1449 is the Underwriters Laboratories Safety Standard for Surge Protective Devices (SPD). Surges are rapid increases in voltage and current that can occur on AC or DC power circuits that can damage equipment attached to these circuits. An example of a surge would be a lightning strike on or near exposed power lines. The strike can induce voltages on the power line that can exceed a million volt.