Three-way switch for home automation apparatus and method

A switch for premises electrical circuits provides wireless control compatible with at least one home automation control system technology. A single switch design can operate two-, three-, and four-way circuits without alteration, and without recourse to coordinating remote switches. The switch includes processor functions for restoring a previous state after power interruption, and for establishing a state commanded during the power interruption. The switch uses two single-pole, single-throw relays for positive safety lockout, and adjusts relay actuation timing with reference to power waveform zero-crossing for contact arc reduction with inductive, tungsten, and capacitive loads.