Intermatic
Intermatic T1975 electromechanical timer 24 hr SPDT 120V 20A
24-hour electromechanical timer with SPDT contacts rated 20 A at 120 V AC, 48 on/off cycles per day and 15-minute minimum setting
- 24-hour scheduling with 48 on/off cycles per day
- 15-minute minimum setting for precise control
- SPDT contacts switch 20 A at 120 V AC
- Steel NEMA 1 enclosure operates from -40 to +130 °F
- Includes 96 trippers for multi-operation programming
Intermatic T1975 24-hour timer
The Intermatic T1975 is an electromechanical timer rated for 120V AC and 20 A with a single-pole double-throw contact. It suits residential or light-commercial circuits that need daily on-off control for loads up to 1/2 hp at 120V or 1 hp at 240V. The steel NEMA 1 enclosure and -40 to +130 °F operating range make it viable for indoor or sheltered outdoor installations.
Wiring and tripper setup
Installation requires connecting line and load to the SPDT terminals inside the steel case; the 5 in width and 3 in depth fit standard junction boxes. The dial accepts 96 included trippers for up to 48 on-off cycles per day with a minimum 15 min setting and a maximum 23-3/4 hr setting. Misplacing trippers or exceeding the 20 A rating are the most common wiring errors.
Mechanical daily-cycle limits
The timer repeats every 24 hours and cannot skip days or store multiple schedules beyond the single dial. It lacks a battery backup, so power interruptions stop the motor and lose the current time position. The 48-cycle daily maximum and fixed 15 min resolution restrict use to applications that tolerate coarse, repetitive timing.
Highlights
- 24-hour scheduling with 48 on/off cycles per day
- 15-minute minimum setting for precise control
- SPDT contacts switch 20 A at 120 V AC
- Steel NEMA 1 enclosure operates from -40 to +130 °F
- Includes 96 trippers for multi-operation programming
Specifications
| Brand | INTERMATIC |
|---|
Questions about this item
How do I confirm the T1975 timer is operating correctly after installation?
Set a 15-minute on period, power the 120 V circuit and verify the load switches on and off at the exact trippers you pinned.
What comes with the T1975 and what must I purchase separately?
The steel NEMA 1 enclosure includes 96 trippers; extra tripper packs (2E132) and mounting hardware are sold separately.
Which T1975 configuration should I choose for a 120 V 20 A lighting circuit?
The single model listed is a 24-hour SPDT timer rated 20 A at 120 V AC with 1/2 hp contact rating — select it for that load.
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