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Grey metal box with mechanical dial and switch visible

Intermatic T104 24-Hour Mechanical Timer Switch 208-277V DPST 40A Indoor

SKU CH-YBRB-GS5XT

A mechanical timer controlling 208-277 V circuits with a 40 A DPST switch and up to 12 daily on/off cycles

  • Controls both legs of 208-277 V circuits with DPST switching
  • Handles heavy-duty loads up to 40 A and 5 HP motors at 240 V
  • Allows up to 12 on/off operations daily with one-hour minimum intervals
  • Includes manual override for immediate control without reprogramming
  • Certified to cULus and cCSAus standards for indoor metal enclosure safety

Intermatic T104 24-Hour Mechanical Timer

The Intermatic T104 is a 24-hour mechanical timer switch designed for indoor installation. It operates on 208-277 V circuits with a double-pole single-throw action rated at 40 A. The Type 1 metal enclosure carries cULus and cCSAus certifications.

Ideal for high-voltage motor and heating loads

This timer suits installations that need up to 12 daily on/off cycles on a 208-277 V supply with 40 A capacity. It is not for 120 V circuits, single-pole switching, or applications requiring more than 12 operations per day.

DPST 40 A 208-277 V rating

The double-pole single-throw 40 A rating at 208-277 V is the specification that determines whether this switch matches the circuit. Verify the supply voltage and pole requirement before purchase.

Highlights

  • Controls both legs of 208-277 V circuits with DPST switching
  • Handles heavy-duty loads up to 40 A and 5 HP motors at 240 V
  • Allows up to 12 on/off operations daily with one-hour minimum intervals
  • Includes manual override for immediate control without reprogramming
  • Certified to cULus and cCSAus standards for indoor metal enclosure safety

Specifications

BrandIntermatic

Questions about this item

Does the T104 timer switch require a separate 208-277V power source to operate its mechanical clock motor?

No, the mechanical timer motor is powered directly from the 208-277V circuit being switched, so no separate control voltage is needed.

Can the DPST contacts on this T104 switch both legs of an existing 240V single-phase motor circuit rated up to 5 HP?

Yes, the DPST switch controls both legs of a 208-277V circuit and supports motor loads up to 5 HP at 240V.

How do I verify the T104 is executing its scheduled on/off cycles correctly after installation?

Observe the load turning on and off at the set tripper times on the 24-hour dial, and use the manual override lever to confirm the switch mechanism moves freely.

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