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How to wire timer

How to wire intermatic 40 amp timer

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

jmgldsmth
  • 1869 Answers

SOURCE: wiring the timer

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

Posted on May 22, 2009

protek480
  • 1714 Answers

SOURCE: Describe your Intermatic &

Is the time clock rotating through the off tripper? If so, and the pump stays on, it's not wired right. Check the wiring at the clock for the pump.

Posted on Jul 02, 2009

  • 243 Answers

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.

Posted on Feb 14, 2010

  • 351 Answers

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..

Please Vote !!

Posted on May 13, 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.

Posted on Dec 28, 2010

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1 Answer

The power is working, but the yellow timer does not move. It's a brand new unit.


Wires from breaker are probably reversed with wires from Load
Call Intermatic.
Or copy following link for wiring:
T172 timer wires identical to T102:
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T102

Nov 11, 2012 | Intermatic T172 24 HOURS 40 AMP 208 277...

1 Answer

How to wire a T174 intermatic time switch timer


Intermatic T174 wires exactly like the T104 240Volt timer.
Only difference between T174 ans T104 is the day skipper wheel on T174.
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T104

These timers are very versatile and can be wired many ways, and changed to control different voltages by changing clock motor wires, or changing clock motor.
Voltages include typical 240Volt. But also 277V, 480V, 120V, 208V and 24Volt

Oct 25, 2012 | Intermatic T174 24 Hr 40 Amps Timer Switch...

1 Answer

What kind of charger do a t103 use


T103 timer is operated with 120Volt AC power.
Open following link to identify correct wiring and identify timer.
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103

Oct 06, 2011 | Intermatic T103 Indoor 120-Volt 40-amp...

1 Answer

Wiring the timer


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

May 22, 2009 | Intermatic EI210 Electronic Auto Shutoff...

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