Question about Intermatic Timer 240 Volt 50HZ - For International Use

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There are two small wire with round clip inside the timer. I want to know the position for those two wire on my 240 v timew. thank yuo

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There are dozens of timers made by Intermatic - most look very similar. Please provide the model number of your timer so I can get you the information you need for YOUR timer - not one the "kinda looks like it"

Posted on Mar 25, 2011

  • Steve Mar 30, 2011

    I had hoped you'd reply with your model info - but that hasn't happened. I believe the two small wires you are referring to are those that power the small clock or timing motor. These wires would connect to two terminals that have a constant 240 volts between them - regardless if the switch was on or off. Again, had I known which model you have, I could tell you exactly where they belong.

    It is also very important that this clock be used in places that have a 50Hz frequency - not 60Hz which is common in North America. Attempting to use this timer on a 240V 60Hz system will cause the clock to overheat and lose about 3 hours per day.



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No power is coming out of the timer. How do I troubleshoot?

-Test across terminals 1 and 2 for 120-277 volt depending on power
-Check if any wires are loose
-Check if any terminals appear burned or damaged
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T104 and ET1725 are wired differently since ET series timers have dry switching terminals. Dry terminals receive no power when timer is energized. So ET series timers require jumper wire.
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Wire a time switch to a pool pump motor

240Volt can be turned ON-OFF by cutting power to one of the two 120Volt wires in the 240Volt circuit. You need Neutral wire for 120V, while 240V does not require neutral wire.

If you have Intermatic 120Volt box timer such as T101 or T103, then 120Volt WH1570 clock motor on back of timer can be changed to 240Volt WG1573.

Other brands timer, it might be possible to change clock motor.
Add comment with brand and model of timer.

If the timer turns OFF power to salt computer, the computer will not operate until power resumes.

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Installing the battery can't get the door opened to insert battery

Drawer pulls straight out. Use small screwdriver or metal nail file.
Copy following link for illustration and CR2 battery, and ez-to-follow programming, and wiring options.

Remember the drawer is also 'plugged' into the timer, so do not bend small metal prongs on drawer.

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Amana ALE643RBW Dry will not start. I checked the thermal fuse and the high limit thermostat both read 0 to 4 back to 0 ohms. It was jumping around back and forth. Checked the heating coil it read 10...

Hello Dale,

Having checked the thermal fuseto be good i will give you a partial list other things that could make the dryer not start

start switch

door switch


circuit breaker, use your meter set to volts ac and check for 240 vac at the outlet,if 240 not at power outlet check for burnt connection inside outlet or bad circuit breaker

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1 Answer

The T104p3 timer is getting power but the clock won't turn and the manual switch also doesn't work. we had a power outage, and the timer has not worked since then.

If I understand correctly, your T104 240Volt Intermatic timer worked fine before.
Now the clock will not rotate.
The manual switch doesn't operate the load.

You checked for electricity.
But did you check for 240 Volts across terminals 1 and 3?
It sounds like the circuit breaker is tripped off on one leg so circuit has 120V and tests positive for power, but not 240V.
Reset breaker all the way over and then click breaker back.

Back to the timer.
If you test electricity at terminal 1 to ground and it reads 120V, that means timer is receiving power from one leg of the 240 circuit.
If you test terminal 3 to ground and it reads 120V, that means same as above.
But unless you test for 240V across terminals 1 and 3, the tests above mean nothing.

Let's understand 240V circuit.
You know all single-phase household circuits require two wires to complete the circuit.
Same is true for 120V and 240V circuits >> each needs two wires to complete the circuit.
Inside the main breaker box are 3 busbars.
There are 2 hot busbars and 1 neutral busbar.
120V circuit is complete with 1 hot wire from either hot busbar and 1 neutral from neutral busbar
240V circuit is complete with 1 hot wire from one hot busbar and 1 hot wire from other hot busbar.

The 240V circuit breaker snaps down over both hot busbars, and then 2 wires come out of that breaker and go to 240V appliance, or to T104 timer terminals 1 and 3.

If circuit breaker is not delivering on both those hot wires, then all along the way you can test for electricity and test will show 120V but not 240V.
So it appears as though circuit has electricity, but circuit will not operate until both hot wires are available to complete the circuit.

That's why you test for 240Volt across terminals 1 and 3
And also test for 240Volt across both wires at circuit breaker.

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A simple test is to move circuit breaker wires to another 240Volt breaker and see if timer works again.
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1 Answer

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