Intermatic T104P3 Mechanical Time Switch – DPST, 40A per Pole, NEMA 3R, 24-Hour Control

Overview

The Intermatic T104P3 mechanical time switch is built for reliability across industrial, commercial, and residential environments. With a double-pole, single-throw configuration, it supports loads up to 40 Amps per pole when operated at 208-277 VAC, 60 Hz. The device offers direct 24-hour control and can handle up to 12 ON/OFF events each day, allowing you to tailor daily routines without ongoing manual intervention. A beige NEMA 3R enclosure provides weather-resistant protection for both indoor and outdoor installations, while a manual override switch adds convenient hands-on control when needed. Minimum ON/OFF times of one hour ensure predictable transitions for a range of loads.

The T104P3 prioritizes straightforward operation with durable, mechanical timing. The included On and Off tripper hardware makes setup quick and repeatable: position the trippers at your chosen times, lock them into the dial, and the timer will perform according to your schedule. Designed for higher motor loads, this time switch stands up to demanding commercial and industrial usage while remaining suitable for residential applications where robust, maintenance-free control is valued.

Key Use Cases and Benefits

• Indoor and outdoor lighting control for homes, offices, signs, and storefronts.
• Pumps, fans, filters, and pool equipment managed on a daily timetable.
• Pool heaters and electric fences scheduled to run only during defined hours.
• Outdoor signage and equipment protected by a weather-ready enclosure.

• High motor load capability: up to 40 Amps per pole, enabling larger or multiple devices on a single switch.
• Reliable daily scheduling: up to 12 ON/OFF events per day with a one-hour minimum cycle.
• Weather-resistant housing: beige NEMA 3R enclosure suitable for exposed locations.
• Convenient control options: includes On/Off tripper hardware and a manual override for immediate action.

How It Works and Practical Tips

Set your 24-hour dial to align with your daily routine, place the trippers at the times you want the load to turn on or off, and secure them in place. The timer then drives the connected circuit according to the pre-set schedule. The one-hour minimum and the high amperage rating give you flexibility for a range of loads while maintaining dependable automation. For outdoor use, install the unit in the NEMA 3R enclosure to protect against weather, dust, and moisture, helping ensure consistent performance across seasons.

Notes to consider: verify wiring and circuit protection match the load and local electrical codes, and use the manual override whenever you need immediate control without waiting for the timer cycle.