Question about Intermatic Timer T12404R Pool & Spa Controls with One T104M201 and T104M

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Model T103 breaker tripoff why - Intermatic Timer T12404R Pool & Spa Controls with One T104M201 and T104M

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1 Answer

You have T103 120V-240V timer with 120Volt clock motor.
Resourceful do-it-yourselfer did not say if this is new installation that is wired wrong, or if existing timer suddenly shows difference.

1) I have tested this timer. Problem with new installation:
Check wiring against diagrams on following link.
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103
This timer can be wired many different ways.
Add a comment if you are confused about electrical schematic, and say what voltage, color of wires, Load(s) you are controlling so expert can give best answer.
If you do not want free help, then resourceful do-it-yourselfer can re-post clear question and offer to pay for answer.

2) Existing installation tripping breaker.
Chances are the tripping breaker has nothing to do with timer, but is caused by bad circuit breaker or short somewhere between breaker and Load.
Open timer and look for loose wires and burned smell and signs of burning. Snap timer mechanism out of box using thumb spring located top inside box and look for burned contacts.
If timer shows nothing burned, then the short is not located at timer. Do more checking and then add a comment or re-post another question.
http://waterheatertimer.org/How-to-replace-circuit-breaker.html

Add a comment for more free help.
Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Posted on Mar 20, 2011

  • Anonymous Apr 21, 2011

    Researched information given in answer above is 100% accurate. Add a comment and include in-focus photo of your timer wiring for verification and identification.http://www.fixya.com/support/r6568559-po...

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Installed timer and I'm getting breaker pop. I've tried several different ways to wire and it keeps poping the breaker. GE Replacement Timer 15600


1) If you are replacing T103, the T103 can be wired many different ways. Not all wiring diagrams are supported by GE 15600 replacement timer that fits into Intermatic box.

2) Double check your T103 terminals
T103 terminals should be A 1 2 3 4
If terminals 3 and 4 have wires, then GE is not correct replacement.
You can buy repair parts for Intermatic timer
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103

3) GE has terminals 1 and L which are connected by brass bridge. If brass bridge is removed, add a jumper wire and connect terminals 1 and L
GE has terminals 1-L X 2

4) Typical GE 15600 wiring shows on following link, in addition to links for parts and manual:
http://waterheatertimer.org/GE-timers-and-manuals.html#15306

White wires on terminal A connect to terminal X
Black wire on terminal 1 connects to terminal 1
Black wire on terminal 2 connects to terminal 2

Sep 11, 2011 | GE Vacuums

1 Answer

I have a t103 intermatic switch and i pop a breaker every time i turn it on. not for sure if the wiring is correct... help


The wiring might be wrong, or the Load is shorted out:
T103 has 120Volt clock motor and can be wired many different ways.
Open following link for wiring diagrams, and then add a comment for discussion of your specific wiring:
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103

Aug 21, 2011 | Intermatic T103 Indoor 120-Volt 40-amp...

1 Answer

We install the timer and it does not work automatically. We can switch it on only manually


You posted under T103 Intermatic 120V timer.

Sounds like you wired the timer wrong:
Timer has 120V clock motor and requires Hot from breaker on terminal 1, and Neutral from breaker on terminal A. This will power clock motor.
If you have any of the wires reversed, timer will do what you describe.
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Jan 26, 2011 | Intermatic T103 Indoor 120-Volt 40-amp...

3 Answers

Can I used the T103M dpst spst timer for christmas lights? I would be coming off 2 20amps breakers in a single slot. I relly don't understand what a dpst and spst are (what they do) I am trying to hook up...


T103M is 120Volt timer that can handle all the Christmas lights.
Minimum on-off time 1 hour.
Rotate dial until current time lines up with silver pointer.
Set on-off trippers on dial.
Let's go step by step.

1) T103 has terminals A 1 2 3 4 >> terminals are also called poles
DPST (double pole single throw) and SPST (single pole single throw) are two different ways to wire this particular timer.
T103 timer can be wired numerous ways... but your project is not complicated.
DPST means timer turns off two terminals/poles (double pole) with each click/throw of timer switch (single throw)
SPST means timer turns off one terminal/pole (single pole) with each click/throw of timer switch (single throw)

2) T103 timer is ST single throw, all the lights come on at same time. So this timer is 1 channel.
1 channel timers are either ON or OFF and everything turns on-off at same time.
You cannot stagger on-off times with 1 channel timer.
If you want upstairs and downstairs lights to come ON at different times, you need two timers .. or a 2-channel timer (which is different ballgame).

3) T103 timer has 120Volt clock motor that is connected to terminals A and 1.
Look at timer and you can see small white wires connected to A and 1 terminals that power 125V clock motor.
When wiring this timer, your wires from 20 amp breaker box connect to terminals A and 1.
Black hot wire from breaker must connect to terminal 1
White neutral wire from neutral busbar must connect to terminal A
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103
http://waterheatertimer.org/B220C.html

4) Terminal 1 must be hot so when timer switch clicks ON, it sends power to terminal 2.
Your load wires connect to terminals A and 2
I made simple drawing of SPST option showing how to wire T103 to 3 receptacles.
Fixya downgrades image so it's hard to see.
Hot wire to terminal 1
Load wire to terminal 2
Neutrals on terminal A
To see image larger:
http://waterheatertimer.org/images/110-600-21Kb.jpg

geno_3245_171.jpg
If you want to wire timer for DPST, which is necessary for loads exceeding 2 horsepower (1500 Watts) on each terminal
Notice black jumper wire from terminal 1 to terminal 3
Notice all white neutral wires to terminal A
To see image larger:
http://waterheatertimer.org/images/110-600-17Kb.jpg
geno_3245_172.jpg
I made third image for guy who was wiring high amperage blowers, that show wiring for two T103 timers. Having two timers would let upstairs and downstairs lights come on at different times.
http://waterheatertimer.org/images/110-with-2-timers.jpg

Dec 11, 2010 | Intermatic 24 Hour Mechanical Mechanisms...

1 Answer

Triing to install intermatic t103 please help. Source is 3 wire 110v want to run 3 blower 110v 9.5 amps each off the t103 timer. Don't have 220v in house just 110v. I need a very simple wiring diagram I...


T103 has 120Volt clock motor, so we can wire this timer.

T103 timer is rated for 30 amps and 2horsepower and your blowers use 28 amps.
So we're getting close to max on the timer. Hopefully blowers won't all be started at one time since motors draw maximum amperage when they start.
However, you need 30 amp breaker and orange 10 gauge wire for that much amperage >> unless only one blower is turned ON at any given time.
Always match wire size, amperage of breaker and amperage of Load or it will trip the breaker.
If you put 30 amp breaker on size 10 wire it is good. But 30 amp breaker on smaller size 14 or 12 gauge wire is fire hazard.
http://waterheatertimer.org/Color-codewire.html
Add a comment at any time, and I will respond

Look at the basics:
You have 2 cables.
One cable comes from breaker box.
Other cable goes to three 120V plugs (120V is same as 110V).

Each cable has black-wire, white-wire and bare-copper-ground-wire.

How to wire the timer.
Timer has 5 terminals: A 1 2 3 4

A) Cable from breaker box:
White wire from breaker connects to terminal A
Black-wire from breaker connects to terminal 1

B) Cable going to 3 plugs
Black wire to plugs connects to terminal 2
White wire to plugs connects to terminal A
Ground wires connect to green ground screw.

Terminals 3 and 4 are not used in this case.
Here is a wiring diagram that shows 120Volt from breaker box and 120Volt going to Load
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103

Nov 27, 2010 | Intermatic T103 Indoor 120-Volt 40-amp...

1 Answer

I have a intermatic timer model T103 i just put in. I use it to run outdoor lights. I can manually turn off and on lights but i cant get the clock to rotate or work. I have returned it and replaced it...


Sounds like you have Line and Load wires reversed.
Line wires come from breaker to timer.
Load wires leave timer and go to Load (light, fan, motor, pump)
Open following link to view wiring for T103
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Nov 10, 2010 | Intermatic & Indoor/Outdoor Rain Tight...

1 Answer

Model T104P wiring instructions for 110volt motor


T104 timer is for 240 Volt circuits. It has internal 240V clock motor. Clock terminals and timer terminals are connected, so there is no way this timer can control 110V circuit.
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html

T101 timer is for 110V circuit.
T101 has 110V clock motor
Both white neutral wires = terminal A.
Black hot wire from breaker box = terminal 1
Black wire to load = terminal 2.
Grounds = green screw
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T103 timer is for 110V circuit
T103 has 110V clock motor
Both white neutral wires = terminal A.
Black hot wire from breaker box = terminal 3
Black hot wire to load = terminal 4
Grounds = green screw

T1905 timer is for 110V circuit.
T1905 has 110V clock motor
Both white neutrals = Clock terminal
Black hot from breaker = COM
Black to load = NO [load comes on when timer turns on]

Sep 21, 2010 | Intermatic & Indoor/Outdoor Rain Tight...

1 Answer

Circuit breaker keeps tripping when timer turns on. Also, if turned on manually.Intermatic T103. I've had this timer for about a year and everything was fine until now.


Since the timer doesn't trip the breaker until it turns on the load, the circuit is OK up to and including the timer. Either the load is faulty (has a short) or the wire supplying the load is damaged. You can test the wire that supplies the load by disconnecting the load then turning the manual switch to ON. If the breaker doesn't trip, then you know it is the load itself that is causing the problem.

Mar 21, 2010 | Intermatic T103 Indoor 120-Volt 40-amp...

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