Intermatic T104 24-Hour Mechanical Timer Switch – 208–277 VAC, DPST, Indoor, 40A

Overview

The Intermatic T104 24-hour mechanical timer switch delivers reliable, hands‑free control for a range of loads. Built for indoor use, it features a double pole, single throw (DPST) design that switches both legs of a 208–277V circuit and supports heavy-duty applications up to 40 Amps per pole. With the ability to schedule up to 12 on/off events per day and minimum 1‑hour intervals, this timer helps you align equipment operation with daily routines without constant manual input.

Designed to operate with a straightforward mechanical interface, the T104 includes a practical manual override for quick, temporary control. While it excels in controlled indoor environments, note that it is not rated for outdoor installation, making it ideal for spaces like utility rooms, offices, schools, and other indoor facilities where dependable scheduling matters.

Key Features

• DOUBLE POLE, SINGLE THROW (DPST) configuration controls both legs of a 208–277V circuit
• Heavy-duty loads up to 40 Amps per pole, suitable for motors up to 5 HP at 240V
• 1 to 12 on/off operations per day with minimum 1 hour on/off times
• Includes one “On” and one “Off” tripper for flexible scheduling
• Indoor metal enclosure designed for durable, long-term mounting
• Manual override enables immediate, temporary control when needed

Real‑World Use Cases

Use cases span residential, commercial, and light industrial settings. Schedule interior lights to match business hours, automate circulating pumps, or run ventilation fans according to a predictable daily pattern. The unit’s indoor-only rating makes it a reliable choice for equipment that benefits from a simple, repeatable schedule without the complexity of digital controllers.

In spaces where reliability and straightforward operation matter, the T104 can help reduce manual labor and ensure consistent operation cycles. It pairs well with conventional electrical installations and standard control panels, providing a dependable, non-digital timing solution that remains easy to service and adjust.

Notes on Use

• Not rated or recommended for outdoor installation
• Best suited for indoor environments with a secure mounting location

If you’re seeking a robust, no-fuss timer with proven performance for 208–277V circuits, the Intermatic T104 offers a practical balance of capacity, scheduling flexibility, and tactile control that can support a wide range of everyday automation needs.