Did you know slips, trips and falls are some of the most common home safety hazards? Say goodbye to stubbed toes and bruised shins. Add a four-way switch and walk with confidence.

In the 120V circuits of homes and offices, the grounded conductor is the same as the neutral. Typically, when wiring a switch for a 120V load (e.g., a light) only one wire comes to the switch and only ...