Electric water heaters, pumps, signs and parking lot lighting on 240 V or 277 V circuits often only need a simple daily on/off schedule. The Intermatic T104P is a 24-hour mechanical time switch with a 208-277 VAC clock motor and DPST contacts rated 40 A, housed in a gray NEMA 3R plastic enclosure for indoor or outdoor mounting. It allows up to 12 on/off operations a day.
Why electricians pick it
- DPST contacts switch both legs of a 240 V load.
- 40 A resistive contacts, 120 to 480 VAC.
- NEMA 3R plastic case for indoor or outdoor walls and won't rust.
- Up to 12 on/off operations per day, with a manual override lever.
- One on and one off tripper included.
Specifications
| Spec |
Detail |
| Brand |
Intermatic |
| Model |
T104P |
| Type |
24-hour mechanical time switch |
| Clock motor voltage |
208-277 VAC, 60 Hz |
| Contacts |
DPST (2 NO) |
| Resistive rating |
40 A, 120-480 VAC |
| Tungsten rating |
40 A, 120-277 VAC |
| Operations |
Up to 12 on/off per day, 1-hour minimum on/off |
| Enclosure |
NEMA 3R plastic, gray |
| Wire size |
14-8 AWG |
| Operating temperature |
-40 to 130 F |
| Included |
1 on and 1 off tripper; manual override |
Pro tip from the counter
The clock motor is powered from the line side, so land the supply conductors on the terminals marked LINE and the load on LOAD. If supply and load are swapped, the motor only runs while the contacts are closed, so the clock stops at the first OFF and never turns the load back on.
Best for: electric water heater off-peak control, pool and well pumps, 277 V sign and parking lot lighting, outdoor equipment timers
Ships Canada-wide from our Vaughan, ON location. Contractors can get trade pricing through a quote or by phone at (905) 553-7171.