Intermatic T103 Indoor 120-Volt 40-amp Timer Switch-Double Pole/Single Thro Logo

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Anonymous Posted on Mar 24, 2013

How do you wire the intermatic timer T103 for 120 v

How do you connect the incoming wire to the T103

5 Related Answers

jmgldsmth

Jim Goldsmith

  • 2005 Answers
  • Posted on May 22, 2009

SOURCE: wiring the timer

green wire=ground
black wire=hot
white wire=neutral
blue=switch

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Anonymous

  • 243 Answers
  • Posted on Feb 14, 2010

SOURCE: Bought a Intermatic sprinkler timer. need help.

reading the specs i should say its a timer for only one zone. you can use it for one zone switching or for the pump. sorry.

Anonymous

  • 351 Answers
  • Posted on May 13, 2010

SOURCE: Trying to replace Intermatic with Utilitech inwall

The wires on your new switch are intended for black = power .. white = neutral . and red = lights .. with two black wires on the old switch I am assuming that there is a bundle of white wires in that wall box, the white timer needs to join that bundle ... then you need to determine which black wire is the power from the electrical panel ( voltage tester) and connect to the black timer wire .. the red timer wire connects to the other black wire in the wall..

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Anonymous

  • Posted on Dec 28, 2010

SOURCE: New intermatic T101 timer problem - timer is not

Manual override lever is good overall test of T101 120Volt timer.
T101 timer has 3 terminals: A 1 2

See wiring diagram on following link:
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T101

Electricians test, they don't guess.
So test your wire:
Separate all wires for testing.
Use ordinary 2 prong tester.
Tape wood sticks to tester leads to keep hands away from power.
Stand on dry boards. Do not hold or touch anything metal.
Turn power ON.
Test each wire to bare ground wire.
Tester lights up on Hot wire. 120V circuit has only 1 Hot wire. If you have 2 Hot wires, you might have 240Volt circuit and need T104 timer. If circuit has 1 Hot wire, then that Hot wire must connect to terminal 1.
If you have NO Hot wire, then check circuit breaker.
Hot wire is identified.
Now test Hot wire to all other wires, except bare ground wire.
Tester lights up on Neutral wire. Neutral wire must connect to terminal A.
If you have NO Neutral wire, then additional wiring is needed, or circuit needs further testing to see what type of wiring you are working with.
Bare ground wires connect to green ground screw.

Notice there are small white wires also connected to terminals A and 1. These small white wires power the 120V clock motor. With Hot on terminal 1 and Neutral on terminal A, the clock motor will run, and yellow dial will rotate.

If timer dial does not rotate after connecting Hot ans Neutral, then test voltage across Hot and Neutral to make sure it reads 120V.

Your circuit should have 2 wires remaining.
These wires go to 120Volt load (fan, light, motor)
Connect these two wires to terminals A and 2.
Try manual override.
If Load turns ON-OFF, then timer is wired correctly.
If Load does NOT turn ON-OFF, then reverse Load wires on terminals A and 2.

Add a comment any time.

A

Anonymous

  • Posted on Apr 30, 2011

SOURCE: I have 2 intermatic T104M

You might have to add a comment to help sort this out.
USUALLY but not always, if your red wire is connecting to terminal 3 on one timer, then it also connects to terminal 3 on other timer BUT these timers can be wired many different ways.
I have T104 timer on my desk and know the terminal numbers and wiring but I can't see your wiring.
http://www.fixya.com/support/r6568559-post_photograph_fixya_questions_answers

Always take a photo of wiring before starting the replacement process.
Timers should not have both solid and stranded wire connected to same terminal because screw plate will tighten down on solid copper wire, but stranded wire will be loose.
Also make sure that no part of insulation on wires is under the screw plate.

Open following link for T104 wiring help:
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html
http://waterheatertimer.org/How-to-troubleshoot-Intermatic-timer.html
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#T100

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Related Questions:

0helpful
1answer

Lost wiring manual

The wiring manual is no longer available for that model from Intermatic. However, I can tell you that the black wire on the photo cell connects to the incoming hot wire, (usually black). The red wire on the photo cell connects to the wire that goes to the light (usually black). The white wire on the photo cell connects to _both_ the incoming white (neutral) wire and the white (neutral) wire that goes to the light or load.
0helpful
1answer

I need to know the wiring for this timer. There are 2 brass screws on the left (w/ the number 1), and 2 screws on the right (marked X and 2) - 1 bright (X) and 1 brass (2). Where do I connect my electric...

Some how this ended up in the riding mower section. You didn't indicate what brand of timer.
If it is a tork then here is a typical diagram: The incoming hot ( BLACK) would connect to the L the out going black would connect to X. The white neutral coming in and out would connect to the terminal without number. Intermatic timers are similar, not same terminal numbers. You can download a intermatic manual at www.intermatic.com

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Oct 07, 2010 • Garden
0helpful
1answer

Timer clock only runs when in on position

That's because the timer is mis-wired. The incoming wires from the circuit breaker _must_ be connected to terminals 1 and 3. The out going wires to the water heater must be connected to terminals 2 and 4.

The clock timer motor is connected internally to terminals 1 and 3, so it won't work if the incoming (always hot) wires are connected to terminals 2 and 4 (until you close the contacts by moving the manual lever to the ON position)
0helpful
1answer

Repacing old timer with utilitech timer that fits into light switch space. Old timer connected to two (2) wires and your timer has four (4) wires on your switch, Can you tell me how I can make this work??

ON the new timer connect the Blue wire to the wire going to the light. Connect the Black wire to the incoming hot wire. Connect green wire to ground terminal if you have one. The red wire is not used, (wirenut it off) unless you have a 3way switch setup (two or more switches)
0helpful
1answer

Timer is wired correctly but not working

Could be bad timer motor. You can replace these easily. Be sure timer motor wires are on the same terminals that incomming line wires are connected to. You can find parts and info at www.intermatic.com
4helpful
1answer

T101

Here's the wiring diagram:
http://www.intermatic.com/~/media/files/intermatic/products/instructions/timers/t101%20-%20english.ashx

The wiring is as follows:
Connect _both_ the incoming and outgoing neutrals (white) wires to the "A" terminal. The incoming [(LINE) (hot) (from the breaker or source)] black wire is connected to the #1 terminal and the outgoing (LOAD) black wire is connected to the #2 terminal.
Both of the bare or green wires are twisted together along with a 6 inch or so pigtail using a red or yellow wire nut. The pigtail is then connected to the green "GR" screw on the enclosure.
1helpful
1answer

I just installed a new intermatic T101 timer, the lights work when i flip the switch manually, but the timer isnt moving

By chance did you connect both the incoming and outgoing white (neutral) wires together without also connecting them to the "A" terminal? If so, untwist them and connect both of them under the "A" terminal. The timing motor will not work if the "A" terminal is not connected to a neutral.
With the circuit energized from the breaker, you should be able to read 120 volts from the "A" terminal to the #1 terminal.
Also, check to make sure the yellow dial is pushed in and set to the correct time.
Otherwise the timer is defective and a return to the store is in order.

The wiring for the T101 is as follows:
Connect _both_ the incoming and outgoing neutrals (white) wires to the "A" terminal. The incoming [(LINE) (hot) (from the breaker or source)] black wire is connected to the #1 terminal and the outgoing (LOAD) black wire is connected to the #2 terminal.
Both of the bare or green wires are twisted together along with a 6 inch or so pigtail using a red or yellow wire nut. The pigtail is then connected to the green "GR" screw on the enclosure
0helpful
2answers

I set my T104R3 on and off clips to desired times and turned the timer on. At set time the timer went off, but the clock stops and does not continue and turn on at the desired time.

The T104 timer is miswired when it does things like that. The 240 volt clock motor is internally connected at the factory to terminals 1 and 3. That means that one of the incoming (line) 240 volt wires (pick one) _must_ be connected to terminal #1 and the other _must_ be connected to terminal #3.

The outgoing (load) 240 volt wires are connected to terminals 2 and 4.

The Intermatic wiring diagrams leave a lot to be desired. I wrote the following tip to help clarify intermatic T103 and T104 timer wiring, I hope it helps:
http://www.fixya.com/support/r3734548-wire_intermatic_t103_t104_timers
0helpful
1answer

How do you wire a model GMXST-1-240-M Intermatic timer

There are many ways to wire the Intermatic GMXST-1-240-M timer. If it is not wired correctly you can permanently damage the timer.

For "regular" use, if all you want to do is turn a 240 volt load ON and OFF with the 7-day timer, and you are _very_ sure that you have a 240 volt timer (they can be 120 volt or 240 volt), here is how to wire it:

LINE connections:
The first incoming LINE (L1) 240 volt wire (pick one) is connected to terminal #1. A jumper (same wire size) is then installed from terminal #1 to terminal #3 [(COM) or (Common)].

The other incoming LINE (L2) 240 volt wire is connected to terminal #2.

LOAD connections:
The first outgoing (LOAD) 240 volt wire (pick one) is connected to terminal #2 _also_.

The other outgoing (LOAD) 240 volt wire is connected to terminal #4 [(NO) or (Normally Open)].

Again, while this is still just a basic timer there are at least 10 different ways to wire it depending on what kind of equipment is used, how one wants to control the equipment (using the Normally Open or Normally Closed contacts) or (HI or LOW speed for a 2 speed fan), the clock voltages (120v or 240v), and the load voltages (24 volt to 240 volt).

If you are not sure how to wire this timer after reading this post, I highly recommend posting back with very specific information or calling a _qualified_ electrician, as mis-wiring this timer can permanently damage the timer, connected equipment, and/or personnel (that means you).

Here is the wiring diagram:
http://www.intermatic.com/~/media/files/intermatic/products/instructions/grasslin/gmxst-i-240%20-%20english.ashx
0helpful
2answers

Clock doesn't work

The wiring diagram for that timer is somewhat misleading. The 120 volt clock timer motor is connected internally to the "A" (neutral) terminal and the #3 terminal. The "A" (neutral) terminal is to the immediate left of the #1 terminal.
Here's how to do the wiring for your use, (assuming a 120 volt supply circuit and a 120 volt lighting or other load):
Connect the incoming power (line) black wire to terminal # 3. Connect the incoming (neutral) white wire to terminal "A".
Connect the outgoing (load) black wire to terminal # 4.
Connect the outgoing (neutral) white wire to terminal "A".
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