Intermatic 24-Hour 208-277V Mechanical Time Switch, DPST, Type 3R Enclosure | T104P3
Intermatic
SKU: T104P3
Intermatic T104P3 – 24-Hour Mechanical Time Switch (208-277 VAC, DPST)
Product Overview
The Intermatic T104P3 is a heavy-duty mechanical timer switch designed for continuous 24-hour operation controlling one circuit. Ideal for applications such as pool equipment, circulating pumps, heaters, lighting and other heavy loads, it allows scheduled ON/OFF control with up to 12 operations per day.
Key Features
- Input voltage: 208-277 VAC at 60 Hz.
- Double-pole, single-throw (DPST) configuration for full isolation of load.
- High motor load ratings—supports large pumps and heavy circuits.
- Convenient one-hour minimum ON/OFF interval and provision for 12 ON/OFF cycles per day.
- Weather-resistant enclosure rated Type 3R for indoor/outdoor use.
- Includes one “ON” tripper and one “OFF” tripper for scheduling flexibility.
Technical Specifications
- Model: T104P3
- Voltage Range: 208-277 VAC, 60 Hz
- Switch Type: DPST
- Max Motor/Inductive Load: 40 A per pole (typical), up to 2 HP at 120 V, 5 HP at 240 V (check label)
- Enclosure: NEMA Type 3R Plastic, designed for outdoor/wet locations
- Minimum ON/OFF Interval: 1 hour
Applications & Compatibility
This time switch is suited for pump circuits (filtration, spa, irrigation), pool heater control, outdoor lighting, and other scheduled loads in residential and commercial pool installations. Confirm the circuit voltage (208-277 V) and that your load rating fits within the specification before selecting.
Installation Instructions
- Turn off all power to the circuit before servicing or installation.
- Mount the timer in a suitable location with clear access to set the dial.
- Wire the line (incoming supply) and load (outgoing equipment) according to the wiring diagram inside the cover.
- Set the current time of day on the dial, and install the ON/OFF trippers at your desired schedule positions.
- Close the cover, restore circuit power, and test the timer to ensure it cycles at the set times.
Troubleshooting
- No load switching at scheduled time: Verify the dial is set correctly, trippers are installed firmly, and supply/load wiring is correct.
- Timer won’t run: Check that the incoming voltage is within 208-277 V, and line connections are secure.
- Excessive load draw or tripping circuit breaker: Ensure the load does not exceed the rated motor/inductive limits; use a contactor if necessary.
Maintenance Tip
Inspect the timer annually. Confirm the enclosure is intact, the dial moves freely, and the trippers are secure. Clean out any dust or debris and make sure the manual override switch (if present) is functioning properly. Replacing worn timers before failure helps maintain scheduled operation and prevent equipment downtime.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 7:00 am to 5:00 pm Phoenix Time
Saturday: 8:00 am to 2:00 pm
Sunday: Closed
- We do not ship on Saturday or Sunday.
- Orders totaling more than $300 will require signature confirmation upon delivery.
- We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
- Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
- Expedited shipping options are available at checkout.
Return Policy:
- Products that are received damaged will receive a refund in store credit.
- Most products are eligible for return within 30 days of receipt, except where noted below.
- To initiate a return, please complete an RMA form prior to sending your item back.
- Original shipping costs are non-refundable and will be deducted from the return credit.
- Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
- Some returns will be charged an automatic 15% restocking fee.
- We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
- Please complete the return form to receive your RMA number and return shipping label.
- Chemical products are not eligible for return under any circumstances.
- The Pentair Colorsync 618031 is not eligible for return.
- Pool cleaners are not eligible for return.
- Opened seals and o-rings are not eligible for return.
- Capacitors are not eligible for return.
- Plastic popup tools are not eligible for return.
- Automation components and circuit boards are not eligible for return.
- If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
- Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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