Intermatic WH40 Mechanical Water Heater Timer

Intermatic WH40 Mechanical Water Heater Timer

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Item# Intermatic-WH40

These energy saving timers use n

The WH40 provides a convenient external override switch. Utilities in many areas of the country offer two electric rates for residential or commercial customers. One rate has the regular daytime electrical rate, the other is "off peak" rate. The off peak rate provides customers with "lower-priced" electricity during the nighttime and weekend periods. These time switches allow the customer to shift electricity use into these off-peak time periods in an attempt to save utility costs.


  • Model #: WH40

  • Switch: DPST

  • Clock Supply Volts 60 Hz: 250

  • Watts: 10000

  • External Switch: Yes

  • Amps/Pole: 40

Case: Drawn steel 7-3/4" (19.7 cm) High, 5" (12.7 cm) Wide, 3" (7.6 cm) Deep in gray finish. Spring hasp, with hole for lock, holds permanently attached, side hinged door closed. Three mounting holes on back plus handy box mounting holes.

Knockouts: Combination 1/2"-3/4" nominal knockouts, one on back and each side of case and two on bottom.

Switch Rating: 40 Amp Resistive, Inductive or Tungsten 120-277 VAC; 1000 VA pilot duty 120-277 VAC; 2 HP (24 FLA) 125 VAC; 5 HP (28 FLA) 240 VAC.



  • Residential

  • Commercial

  • Industrial

  • Institutional/ Schools

  • Military Facilities







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