Parking lot lights, signs and ventilation fans that run every day on a schedule need a time switch that can carry real current. The Intermatic T171 is a 24-hour mechanical time switch with a 125 VAC clock, a 40 A SPST contact and a NEMA 1 indoor metal enclosure. Its Skipper feature lets you skip selected days of the week.
Why electricians pick it
- 40 A SPST contact switches heavy loads directly, without a separate contactor in many cases.
- Skipper screws omit operation on chosen days, such as weekends.
- Up to 10 ON/OFF operations per day with 1-hour minimum ON and OFF times.
- Manual lever changes the load state without disturbing the schedule.
- Lockable NEMA 1 metal enclosure; cCSAus certified.
Specifications
| Spec |
Detail |
| Brand |
Intermatic |
| Model |
T171 (T170 series) |
| Clock voltage |
125 VAC, 60 Hz |
| Contact |
SPST (1 NO), 40 A |
| Resistive / inductive |
40 A resistive; 40 A inductive and tungsten at 120/240/277 VAC |
| Motor |
2 HP at 120 VAC; 5 HP at 240 VAC |
| Timing |
24-hour dial, 1 to 10 ON/OFF per day, 1 h minimum |
| Included |
1 ON tripper, 1 OFF tripper, 3 day-skipper screws |
| Enclosure |
NEMA 1 indoor metal, lockable hasp |
| Operating temperature |
-40 to 130°F |
| Certification |
cCSAus |
Pro tip from the counter
The T171 has a 120 V clock motor and a single-pole contact, so it is meant for 120 V loads. For a 240 V two-pole load such as a pool pump or water heater, a 208-277 V double-pole model like the T104 is the usual choice.
Best for: parking lot and sign lighting, exhaust and ventilation fans, commercial and farm loads, water heaters on 120 V circuits
Shipped Canada-wide from our Vaughan, ON counter. For contractor pricing, send a quote or call (905) 553-7171.