Question about Intermatic & Indoor/Outdoor Rain Tight Timer

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How to wire in

My present wireing on my existing timer has only 2 black wires and 1 white. I don't know wwhat wire goes where

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  • wainnsal Jan 21, 2009

    thank you, that really clears it up for me.

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Normally Black (or colored) wires carry the current and White wires are the nuturals. So, it stands to reason that one black wire would go to one side of the time and the other black to the other side of the timer. Since a timer is basically a switch i doubt that it would matter which black went to which side of the timer. The white gets tied to another white,the one from the appliance or light that you are turning on and off with  the timer. 

Posted on Jan 21, 2009

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Ge timer 15350 110 4 wires 4 post have 2 white on post 1 1 bk on post 2 0 wires on post 3 1 bk on post 4 2 grounds to the box pump will work manually timer will not work


Unknown if this is new installation, or existing install that stopped working.
Copy following link for wiring diagram showing GE 15350 timer:
http://waterheatertimer.org/GE-timers-and-manuals.html#15306

Look at terminal labels, should be L 1 X and 2
Power coming from breaker should be 120Volt Black Hot wire, and White neutral wire.
Cable going to Load should be Black and White.
White wires should be on terminal X
Black Hot should connect to terminals L and 1
Black to Load should connect to terminal 2

If your timer looks different, repost question with link to photo on flickr

If timer stopped working:
GE15350 timer is 120 volt timer made by Tork.
It uses P47 trippers, and Tork 101 clock motor.

Jul 04, 2012 | Hardware & Accessories

1 Answer

I have two of these switches and they both are operating incorrectly. I use them to control bathroom fans in two separate bathrooms, but they both act the same. That is, when I push one of the time...


Leviton countdown timers have additional wire that powers internal electronics.
Leviton timers have red-black-white-green wires (or blue-black-white-green wires)

1) Regular single pole switch has 2 insulated wires. One of these wires is Hot from breaker, and the other goes to Load (fan)
2) Timer green wire connects to bare ground as you know.
3) Hot from breaker connects to timer black wire.
4) Load wire connects to timer red (or blue) wire.

5) Located in back of box are white wires that are twisted together and covered with wire nut.
These are Neutral wires. Connect timer white to these wires. This will power timer electronics.
6) If box does not have Neutral wires described above, then connect timer white to bare ground along with timer green wire.

7) Turn power ON and try timer countdown.
If timer does not work, then reverse timer red and timer black wire.

8) If box does not have neutral wires: Image on link below shows similar Intermatic timer:
Image applies ONLY when Neutral is not available.
http://waterheatertimer.org/images/EI210-wiring-full.jpg

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 25, 2011 | Leviton 6230M Decora Four Preset...

1 Answer

How do you wire a 3-wire timer switch (white, black, red) to replace a single light switch to a front door light?


You have a 3 wire in-wall timer.
Colors red black white

You are replacing single pole switch that has 2 wires (plus ground, we'll ignore ground for now)

So switch has 2 wires:
1 switch wire goes to Load/lights > this wire connects to timer red wire
1 switch wire is Hot from breaker > this wire connects to timer black wire
When finished, if lights do not turn on, then reverse red and black wires.

Timer white wire powers clock inside timer.
To complete circuit to clock, white wire is connected to neutral wires.
Located in back of electric box are white wires twisted together and covered with wire nut.
These wires are neutral, connect timer white wire to these wires.

If box does not have neutral wires described above, connect timer white to bare ground wire.
Add a comment any time

Dec 10, 2010 | Hardware & Accessories

1 Answer

I am trying to wire a timer switch in a four gang outlet box and the timer switchhas a red, black, white, and green wire. The existing switches in the box are all wired with two black wires and one copper...


Your switch has two black wires.
One of these wires goes to Load (light fan motor)
The other wire is hot. And this wire probably connects back to other switches in box making it easy to identify.

Timer-black wire goes to hot wire.
Timer-red wire goes to Load wire.

Timer green wire goes to bare ground wire.

Timer white wire runs the clock located inside timer. So timer clock is just like alarm clock, and needs its own power.
In back of 4-gang box are white wires that are twisted together and covered with wire nut.
These are neutral wires.
Timer-white wire connects to neutrals, and this completes clock circuit.

Dec 07, 2010 | Intermatic Inc. EJ500C Digital Wall Switch...

1 Answer

I got a RT1 to replace switch on bathroom fan, but the existing switch has only 2 black wires.The RT1 has red, black and white wires. What do I do ?


The Pass and Seymour RT1 and Wattstopper-brand RT-series and the Utilitec RT1 are countdown timers.
You push the button and the timer turns on the Load (light,fan, motor) and the timer begins a countdown. At the end of the countdown, the timer turns off the Load. Excellent way to make sure lights and fans don't stay on all day by accident.

Your existing switch has two wires. The switch does not have an internal clock like the timer.
The timer has one additional wire because the internal clock has to have power just like your electric alarm clock.

Manual says:
Black Hot wire connects to timer-black wire
Black wire to Load connects to timer-red wire
Timer-white wire connects to other white wires in the box (these wires are usually twisted together and covered with a wire nut)

Summary: This information means the two wires that came off the switch connect to the timer black and timer red wires.
Which goes to which? You can connect them either way, and if it doesn't work, simply switch the pair with each other. Or you can turn on power and test to see which one has power, and that is the Hot wire that connects to timer-black.

Now let's focus on the timer-white wire ... this is the wire that allows the internal clock to work.
Look inside the box where switch came out. Do you see two or more white wires pushed to the back of the box and covered with a wire nut?

The whites covered with wire nut are the Neutral wire and the timer-white connects to them.
*If your box does not have those white wires, then timer-white can connect to bare ground until the day you hire an electrician to drop additional line into box. Connecting to ground is NOT code and not recommended but it will work.

Here's a neat trick for connecting the white wires together.
Pull out the whites so you can work on them.
Take off the wire nut.
Hopefully the whites will be twisted together as per National Electric code so when you remove the wire nut, the whites stay together.
Now go back to the timer-white wire and remove about 1-1/2" of insulation off the timer-white wire so you have a fairly long bunch of stranded wire
Hold the whites together so the insulations match up
Wrap your stranded wire around the solid copper wires like a candy cane all the way to the end
Put the wire nut back on real tight
Then pull on your timer-white wire to make sure it will not come loose from the wire nut
Push the wires to back of box.
Connection is done.

See how to twist solid copper wires together
http://waterheatertimer.org/How-to-twist-electric-wire.html
See wire nuts
http://waterheatertimer.org/How-to-select-right-wire-nut.html
See inside your main breaker box
http://waterheatertimer.org/See-inside-main-breaker-box.html

Oct 17, 2010 | Pass & Seymour / Legrand RT1-W 10-20-30-60...

1 Answer

I am replacing an old intermatic model EJ341 spring wound timer with a GE15086 digital in wall timer. The old intermatic timer has two black wires from each side (I dont know which one is hot). Each of the...


GE 15086 is a 7-day programmable timer. It has more wires than spring-wound timer because clock motor runs on 120V circuit, just like ordinary electric clock. The clock on spring wound timer operated by a spring.
f7d4104.jpg


If I understand correctly, the old timer has 2 wires. One of these wires is the Hot wire ... and that wire will connect to GE timer black wire.
The other wire from old timer goes to Load ... and that wire will go to GE timer red wire.

Instructions on a lot of these timers say, it timer doesn't work, then reverse the two wires described above ... this is because timer only works when Timer black connects to Hot.

You can also turn on power and test each wire that came off old switch to bare ground wire. When tester lights up, that is Hot wire.

GE timer Green wire connects to bare ground wire.

Moving on to GE timer white wire. This wire is necessary for the clock to run. This wire connects to Neutral wire which is usually white. You can test for Neutral by testing Hot wire to each white wire in box ... when tester comes on, that is Neutral.

If you do not have a white Neutral wire, then connect GE timer white wire to bare ground wire. This is not code, but it will work fine until you hire electrician to run Neutral into box.

Oct 03, 2010 | GE Electrical Supplies

1 Answer

GE digital timer. Instructions say to: 1) connect Hot/live wire of main to black wire of timer, 2) connect neutral (White) wires together, 3) connect Hot/live wire of load to red from timer. 4) green to...


Find the Hot wire:
Your switch has 2 wires. One of these wires is Hot, and one goes to load. Disconnect wires from switch. Turn on power. Do not stand on wet surface. Test each wire to bare copper wire. When tester lights up, that is Hot wire. The other wire goes to load.

Connect wires:
Hot wire goes to Black timer wire
Wire to load goes to Red timer wire
White wire connects to white wires that are twisted together
Bare copper wire connects to Green wire from timer

How to connect white wire to white wires that are twisted together.
a) Strip white timer wire so you have 1-1/2 " of bare wire. Stranded wire will wrap around other wires easily.
b) Remove wire nut. DO NOT UNTWIST wires.
c) Hold all whites together so bare copper lines up. Wrap stranded copper around the twisted wire.
d) Replace wire nut, or use larger wire nut. Twist real tight. Do not use tape. You can solder the connection.
e) When done, pull on white time wire to make sure it is held tight. Push whites back into box.

Sep 25, 2010 | UPM Programmable Wall Switch Timer

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

As to 0912773: the manual leaves out many things that one has to know in order to set and use the switch. As it is, the switch doesn't work at all, except as an ordinary manual on/off switch. $25 and...


Tiny print on the instructions is enough to aggravate ya fierce.

You are replacing switch that has 2 wires with a timer that has 4 wires.

1) 5 minutes to Test wires: If your switch has 3 wires, then you have wrong timer. You need Intermatic ST01C or EJ500C. If your switch has 2 wires, then continue: Disconnect both wires from existing switch. Pull them out where you can test with ordinary tester. Power is on. Test each wire from switch to bare copper wire. When test light comes on, that is the hot wire and it is probably Black.

2) 3 minutes to connect wires:
Timer black wire goes to hot wire which is probably black
Timer red (or blue) wire goes to other wire that was connected to switch
Timer white wire connects with other white wires that are held together with a wire nut and pushed to back of box. [If box does not contain other wires, connect Timer white wire to bare ground wire.]
Timer green wire connects to bare ground wire

3) 5 more hours to program timer
Tiny print shows 5 steps for programming timer. Write the steps out so you can see them clearly. Drink a glass of water. And pull a chair in front of timer to set 7 on and 7 off programs. It will work fine.

Aug 24, 2010 | Intermatic Inc. ST01C Digital In-Wall...

4 Answers

My GE 7-Day Digital Timer model 15086 flashes on


I just bought one today and installed it. It does the same thing - flashes the lights off and on. After some research on the net, it seems that the problem is that an old house is wired with two pole wiring and the new fixtures, (timers included) are 3 pole. The conclusion I have found is that it will not work in a 2 pole wired house. There supposedlly are timers available for 2 pole wiring. I hope this helps. If you find out anything different, please let me know.

Oct 17, 2009 | Hardware & Accessories

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