Question about Intermatic Inc. ST01C Digital In-Wall Timer

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Utilitech Wall Timer #0192773 does not switch landscape lights on? Replaced Intermatic that had 3 wires. Black to Black, blue to black and red was capped. Utilitech came with 4 wires - black, white, green and red. I wired black to black and red to black and left white and green capped.

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  • Intermatic Master
  • 5,245 Answers

Open following link to read wiring details:
http://waterheatertimer.org/Program-wire-Utilitec-0192773.html

Posted on May 24, 2012

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Old timer: Intermatic EJ500 & ST01C timers have a battery. Battery operates the clock motor. Red wire is for 3-way circuit [a hallway with 2 switches is a 3-way circuit].

Utilitec timer, clock runs on 120Volt circuit instead of battery. So clock has to have power.

How to connect wires:
Black timer wire connects to hot wire from breaker box.
Red (or blue) timer wire goes to landscape lights.
White timer wire connects to white neutral wire [or if no neutral is available, connect to bare ground wire].
Green timer wire goes to bare ground wire.

How to find black hot wire and white neutral wire inside box
: Disconnect and separate wires so you can test. Use ordinary tester. Power is on. There is only 1 black hot wire inside each electrical box. Test each black wire to bare ground until tester light comes on > that identifies the black hot wire. Next, test black hot wire to white wires until tester light comes on > that is the neutral wire. Exception: This test does not necessarily work with 3-way switches since they reverse each time switch is thrown.

Posted on Sep 21, 2010

  • Anonymous Feb 27, 2011

    For clear description of wiring and timer programming, open following link: http:/waterheatertimer.org/Program-wire-Utilitec-0192773.html

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Posted on Jan 02, 2017

  • 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: Bought a Utilitech #0192773 to

Utilitec 0192773 replaces single-pole switch and will not work for 3-way applications.

Open following link for clear wiring and programming steps for Utilitec 0192773
http://waterheatertimer.org/Program-wire-Utilitec-0192773.html

Utilitec can also be tricky to program if you are setting up astro dawn-dusk function.

For others finding this thread, same wiring applies to in-wall programmable timers by GE, Woods, Swilight, Sylvania, Tork, Hagar, UPM, Leviton, Grasslin, Wattstopper, Westek, and Intermatic analog timers. Intermatic battery-operated, Brinks and Aube timers are wired differently since they also work for 3-way applications.

Posted on Jun 05, 2011

SOURCE: Bought Utilitech 7 day Digital

Utilitec sells 2 different in-wall timers. Both wire the same.
Open following link for Utilitec wiring instructions.
http://waterheatertimer.org/Program-wire-Utilitec-0192773.html

Posted on Jun 18, 2011

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1 Answer

Im trying to install a Utilitech 0192773 self adjusting wall timer. It has four wires, black(hot), red(hot), white(neutral) and green(ground). I have a standard three light switch plate(outside light,entry...


Thank you for clear description of wiring, switches, and for including timer model number.

1) Open following link for ez programming and wiring for Utilitec.
http://waterheatertimer.org/Program-wire-Utilitec-0192773.html

2) Your single-pole switch has 2 wires.
0192773 replaces single-pole switch only.
Black wire that connects each of the switches is Hot wire: connect this wire to timer Black wire.
Other black wire that connects to switch goes to load: connect this wire to timer red wire.
Timer white wire connects to white wires that are covered with wire nut.
Timer green connects to bare ground wire.

3) How to connect stranded wire and solid wire
http://waterheatertimer.org/How-to-twist-electric-wire.html#stranded

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And 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.
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Sep 03, 2011 | Intermatic & Self-Adjusting Wall Switch...

1 Answer

Bought a Utilitech #0192773 to replace an older and non-working Intermatic SS7 series. The Intermatic had a black wire connected to hot, and a blue wire connected to neutral, and a red wire was capped off...


Utilitec 0192773 replaces single-pole switch and will not work for 3-way applications.

Open following link for clear wiring and programming steps for Utilitec 0192773
http://waterheatertimer.org/Program-wire-Utilitec-0192773.html

Utilitec can also be tricky to program if you are setting up astro dawn-dusk function.

For others finding this thread, same wiring applies to in-wall programmable timers by GE, Woods, Swilight, Sylvania, Tork, Hagar, UPM, Leviton, Grasslin, Wattstopper, Westek, and Intermatic analog timers. Intermatic battery-operated, Brinks and Aube timers are wired differently since they also work for 3-way applications.

Jun 05, 2011 | Intermatic Inc. ST01C Digital In-Wall...

1 Answer

I bought a Utilitech Self Adjusting In-Wall Timer #0192773. The Timer has 4 wires....a black wire...a red wire...a green wire...and a white wire. The switch that I am replacing has 2 black wires and a bare...


The reason there is 2 black in the wall is because a standard line breaking switch was used. Meaning the hot side of the light was the black wire once broken light goes off. You would hook the black from switch to black in wall and white from switch to other black in wall green is ground and red put wire nut on. Red is for a 2 switch system. Where one of two switches in same room controls same light. Its not needed. Take caution when doing this trun light on goto breaker box and flip breakers till you find the right one that powers that light. once lights off then do your thing replacing.

May 06, 2011 | Intermatic Inc. ST01C Digital In-Wall...

1 Answer

Purchased utilitech 0192773 self adjusting wall timer. planning on installing in garage wall switch box for outside lamp posts, 3 total. the wiring in switch box consists of grounds tied together, 2 whites...


you got the wires you need. add switch's white to the white bundle in the back; green to grounds, red to the black going to the light; black to the other black. worked for me!

Jan 29, 2011 | Computers & Internet

1 Answer

I, too, only have 2 wires in my switch. It is not clear what to do with the 4 wires on the utilitech 0192773. Did not see the answer to the same question.


I wrote a page on the Utilitec 0192773
It shows how to wire the timer and shows the manual larger.
http://waterheatertimer.org/Program-wire-Utilitec-0192773.html

Timer-green wire connects to bare ground wire.
Here's what to do Switch has 2 wires.
1) Take switch wires and connect them to timer-black-wire and timer-red-wire. Choose either one for now.
2) In back of electric box are white wires twisted together and covered with wire nut. These are the neutral wires. Connect timer-white to these wires.
3) If electric box does not have white neutral wires described above, then connect timer-white to bare ground.
4) Turn on electricity, and push ON-OFF button. If lights come on, timer is wired correctly. If lights do not come on, then reverse timer-red and timer-black wires.

Nov 14, 2010 | Intermatic Inc. ST01C Digital In-Wall...

1 Answer

I have an outside light that I want this timer to control. The switch box has a black and a white going out to the light and a black and white with the electricity. The instructions show to hook the red...


You posted under ST01C timer which has 3 wires: black blue and red (no white wire)
Your description seems to say your timer has 3 wires: black white and red

These are two different timers
I'm going to give you two different instructions that are dead-accurate for both types of timers above:

1) Instructions for ST01C and EJ500 Intermatic timers with black blue and red
Lets do the black and white with electricity:
The black Hot wire connects to Timer-black-wire
The white Neutral wire connects to white wire going to Load (to lights)

Now the black and white to the Load (lights)
The black to Load (to light) connects to Timer-blue-wire
The white wires are connected together with wire nut

The red wire is capped off, and used only if you have 3-way switching.
Green connects to bare ground

2) Instructions for all in-wall timers with black, red and white wires (except Aube series timers)
Lets do the black and white from electricity
The black Hot wire connects to Timer-black-wire
The white Neutral connects to Timer-white-wire and to white wire going to Load

Now the black and white to the Load
The black wire to Load connects to Timer-red-wire
all three white wires are connected and covered with wire nut
Green connects to bare ground

DO NOT CONNECT RED TO WHITE with any model in-wall timer and then turn on power or it can blow out the timer >>> I just did that while experimenting with the Utilitec 0192773.
Red wire goes to Load on all timers, except with Intermatic ST01C and EJ500

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Oct 17, 2010 | Intermatic Inc. ST01C Digital In-Wall...

1 Answer

I am trying to install utilitech 7 day in-wall timer. Their are 3 switches in box controlling different fixtures. The old switch had black connected and a black looped to the next switch. How do I connect...


1) Wires in box:
Black looped to to next switch is Black hot wire
Other Black goes to fixture

2) Connect timer wires
Black timer wire goes to Black hot
Red (or Blue) timer wire goes to fixture
White wire connects to white neutral wires (usually connected together with wire nut and pushed to back of box)
Green goes to bare ground wire

Sep 04, 2010 | Intermatic Inc. ST01C Digital In-Wall...

1 Answer

Trying to replace Intermatic with Utilitech inwall timers. Have 2 black wires in wall box with other switches for other lights. Which of the Utilitech 4 wires- black, red, white & green get conected to...


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 !!

Apr 08, 2010 | Intermatic Inc. EJ500C Digital Wall Switch...

1 Answer

Only 2 black wires on current switch - Utilitech 0192773 has 4


Webpage explains wiring and has large print:
http://waterheatertimer.org/Program-wire-Utilitec-0192773.html

Mar 07, 2010 | Intermatic Inc. ST01C Digital In-Wall...

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