EST

Electrical circuitry that removes or eliminates power from electrical appliances, products and devices upon detection of potentially hazardous or undesirable conditions and provides an audible alarm and/or visual indicator upon detection of potentially hazardous or undesirable conditions; electrical surge suppressors; electrical transfer switches; electrical protection devices and circuitry, namely, ground fault circuit interrupters, equipment leakage circuit interrupters, leakage current detection interrupters, residual current devices and portable residual current devices; safety circuitry for power monitoring, control and protection of electrical distribution systems and devices