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Timer Switches & Light Sensors

Timers and sensors that switch lights, fans and pumps automatically: in-wall countdown timers, programmable 7-day switches, plug-in outlet timers, and dusk-to-dawn photocells.

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Timers and sensors that switch lights, fans and pumps automatically: in-wall countdown timers, programmable 7-day switches, plug-in outlet timers, and dusk-to-dawn photocells.

What to check

  • Neutral wire. Many digital in-wall timers need a neutral in the switch box; mechanical and some electronic models do not.
  • Load rating. Ratings differ for resistive loads, LED lighting and motors. Bath fans and pool pumps need a motor rating.
  • Indoor or outdoor. Outdoor plug-in timers have a weather-resistant housing and usually a grounded outlet.
  • Countdown or schedule. Countdown timers suit bath fans and heat lamps; programmable timers suit porch and landscape lighting.

Related: outlets and switches and dusk-to-dawn lighting. Wiring work should follow local electrical code.