Question about UPM Programmable Wall Switch Timer

1 Answer

I have two 110V lines (two wire) coming into a box. I have 2 loads out (two wire). 1 load is always on and one is on a switch. All four whites are wire-nutted together. How do I incorporate this timer switch?

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  • catzemis Nov 04, 2010

    Steve_con,
    Spot on! Thanks for the help; my wife appreciates it. Even with a poor description of the problem--you got it working on the first try!

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If I understand this correctly, you a have a 120 volt supply cable consisting of a black and white insulated wire. You have two cables that go out of the box - each of those cables has a black and white insulated wires as well. One of those load cables is to remain on all the time, the other is to be controlled by this switch.

You didn't provide a model number for your switch - and there are several made. If yours is the ETW350, or similar; it has a BLUE load wire, a WHITE neutral wire, a BLACK supply wire and a GREEN ground wire.

Connections are as follows. UPM GREEN wire connects to ground (that should be the the other bare or green insulated wires in the box). The UPM BLACK will connect to the other BLACK "supply wire" that is currently connected to the other BLACK "always on" load wire. The UPM BLUE connects to the BLACK load wire that is to be switched on and off. Lastly, the UPM WHITE wire will connect to the other WHITE wires that are currently all connected together.

If yours is not this model - I have no way of knowing how to help you wire it with any reasonable certainty. If you are unsure of the the model or are unable to locate the model info or manual, please call a licensed electrician to perform this work for you. Be safe, be smart.

I hope this helps & good luck!

Posted on Nov 02, 2010

Testimonial: "Steve_con, My wife thanks you! Even with a bad description of the problem, you nailed it and the solution worked on the first try. Thank you!"

  • Steve Nov 02, 2010

    Please! Turn the power OFF before attempting these connections. Not only will it be safer for you, but some electronic devices are very sensitive to connections without power off first. This way, you won't get hurt or damage the switch.

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1 Answer

What configuration do the output power wires look like. Do I connect to 3 and 4 , slots etc. What is meant by "load" in the instructions?


1) You posted under ET104C DPST (double pole single throw) 24-hour 4-ON and 4-OFF per-day selectable-voltage timer
DPST means that timer will turn off two wires going to 240Volt Load or two separate 120V Loads

Open following link for example Intermatic ET series wiring diagrams and manual:
http://waterheatertimer.org/How-to-wire-Intermatic-ET-series-timer.html

2) Load means whatever electrical device is controlled by timer. ie fan, light, motor, pump, alarm-bell, water-heater, bowling-ball-machine etc.
Line means cable coming from breaker box.

3) If you have a different timer, then add a comment with photo of inside of timer door for possible identification and complete answer.
http://www.fixya.com/support/r6568559-post_photograph_fixya_questions_answers

4) Selectable voltage means you have to choose voltage.
Timer come preset for 240Volts.
If you have 120V 208V or 277V, then follow the vague instructions shown on page 2 #2 of manual.

5) Do not apply voltage to this timer before matching selectable voltage setting with circuit breaker voltage.

6) ET104C has 6 terminals and can be wired many different ways depending on Load voltage, etc.
This timer can do a lot of different things.
If you have ET102C with 4 terminals, then add a comment and clearly explain voltage, color of wires, and what breaker you have and what Load you are controlling for best answer.

7) ASSume you have 240Volt cable coming from breaker box, and that you are controlling a single 240Volt Load like a water heater or pool pump.

240Volt cable from breaker will have 2 hot wires called Line 1 and Line 2
Line 1 black wire will attach to both terminal 1 and terminal 3 (use a jumper wire between terminal 1 and 3)
Line 2 red or white wire will attach to both terminal 2 and terminal 5 (use a jumper wire between terminal 2 and 5)
Your 240Volt Load will also have 2 wires.
Load 1 black wire will attach to terminal 4
Load 2 red or white wire will attach to terminal 6

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.

Apr 23, 2011 | Intermatic INC ET104C 24 HOUR ELECTRONIC...

1 Answer

What is the deal with the two permanent black wires that are both on the white half and switch half? The wiring diagram supplied does not address this.


You are installing switch plug combo with GFCI
Device has 4 screw terminals and 2 wires.
Look at markings on back of device to determine Line and Load screws.

If you are working inside junction box, there are 3 cables for example. Each cable has black and white wires. Cable1 comes from breaker box with Line wires, cable2 goes to light fixture, cable3 goes to next switch or receptacle box in the circuit.

Cable1 Line wires come from circuit breaker: Black wire connects to brass Line screw, White to silver Line screw.
Cable2 wires to light fixture connect to wires sticking out of device and are controlled by light switch.
Cable3 wires connect to Load screws. Black wire connects to brass Load screw, White to silver Load screw. This will put GFCI protection on circuit from that point forward. If you do not want that protection, then connect cable3 on same screws as cable1.

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

Feb 22, 2011 | Pass & Seymour 1595SWTTRWCC4 COMBINATION...

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

Trying to hook up a pilot light switch to a gfi recp not having much luck with getting it to work properly i got 2 conductors from the panel and 2 conductors going to the gfi recp and on the switch i have...


It is unclear what pilot-light-switch is supposed to turn on-and-off.

Option A) pilot-light-switch is going to turn GFCI on-and-off
Option B) pilot-light-switch is getting power from existing GFCI circuit, and switch controls another Load (light, fan or motor) located elsewhere.

Add a comment at any point.
Bare copper wire always connects to green screw.

1) I have a Cooper pilot-light-switch in my office.
Black Hot wire from breaker always connects to dark-colored screw(s).
White Neutral wire from breaker box connects to silver-colored screw
Wire going to Load (light, fan, motor) connects to brass colored screw.

2) Two things happen when pilot-light-switch turns ON:
a) Pilot light turns on. This circuit is powered by black Hot wire, and circuit is complete with white Neutral.
b) Brass screw that had no power, is now powered.

The GFCI:
Hot from breaker always connects to brass-colored Line screw
Neutral from breaker connects to silver-colored screw that is opposite Line screw.
If other switches and plugs are going to be protected by GFCI, they connect to brass Load screw and to silver screw that is opposite Load screw
geno_3245_83.jpg

Option A) You want pilot-light-switch to turn on GFCI receptacle.
a) Wire pilot-light-switch as described above
b) Black wire from GFCI line-screw connects to brass screw on pilot-light-switch.
c) White wire from GFCI silver-screw-opposite-line-screw connects to any white Neutral.

Option B) Pilot-light-switch is getting power from GFCI receptacle AND you want pilot light switch protected by GFCI.
a) Black wire on pilot-light dark screw connects to Load screw on GFCI
b) White wire on pilot-light silver connects to silver screw on GFCI that is opposite Load screw

Option C) same as option B except pilot-light-switch is NOT protected by GFCI.
a) Black wire on pilot-light dark screw connects to Line screw on GFCI or any Hot wire
b) White wire on pilot-light silver connects to silver screw on GFCI that is opposite Load screw or to any Neutral wire

Nov 19, 2010 | Cooper Wiring Devices 277W-BOX SINGLE POLE...

1 Answer

How do I wire an intermatic t-103 timer switch


The T-103 has a 120Volt clock motor

From there, the wiring can go two directions depending on your Load voltage (load is the fan, light or motor that timer turns on-off)

Here is a link that shows exact wiring:
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103

When wiring the T-103, steps 1-2-3 are true for 120V or 240V installation:
1) A white Neutral wire is always connected to terminal A (Neutral wire connects to Neutral busbar in breaker box)
2) A black Hot wire is always connected to terminal 1 >> this hot wire can come from 120V or 240V breaker
3) Black wire going to Load (fan, light, motor) is always connected to terminal 2
The following step is true for 120V Load
4) if Load is 120V, then white wire from Load connects to terminal A
The following steps are true for 240V Load
5) Only the neutral wire connects to terminal A as described in (1
6) The second Black hot from breaker box (240V has 2 hot wires) connects to terminal 3
7) The second White going to Load connects to terminal 4

Here are 2 more links that show how 120V and 240V circuits are wired
http://waterheatertimer.org/See-inside-main-breaker-box.html
http://waterheatertimer.org/B220C.html

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

1 Answer

How do you wire a intermatic t103


I'm looking at the T-103 sitting here in my office.
Terminals are labeled: A 1 2 3 4
I have about 10 different Intermatic timers on the shelves & each is a bit different

The T103 has a 120Volt (or 110V) clock motor
You need a white Neutral wire to operate the T103 clock

120V: Let's say your Load (light, fan, pump) is 120V
The white Neutral from breaker box connects to Terminal A
The 120V black Hot wire from breaker box connects to Terminal 1
The black wire going to Load (fan, light, motor) connects to terminal 2
The white wire going to Load connects to terminal A along with the Neutral
Ground wires connects to green ground screw
If your wires from breaker and wires to load are wired in reverse, the timer will turn ON the Load but the timer will not shut the circuit OFF.
To test which wire is Hot and Neutral, look at explanation at bottom of page.

240V: Let's say your Load is 240 Volts (or 220 Volts)
The clock motor is still 120V so you still need a white Neutral wire connected on Terminal A
Now you have 2 Hot wires coming from breaker box
Hot wire 1 from breaker box connects to Terminal 1
Hot wire 2 from breaker box connects to Terminal 3
Wire 1 going to Load connects to Terminal 2
Wire 2 going to Load connects to Terminal 4
Ground wires connects to green ground screw

What if you don't have a Neutral wire and you are wiring a 240V circuit?
240V circuits normally have 2 hots and a ground, but no neutral
Buy the T-104 timer
The T-104 has a 240V clock motor
Wiring for the T-104 is exactly the same as 240V wiring shown above for T103 EXCEPT there is no Neutral on Terminal A, and Terminal A is bare
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html

How to test which wire is Hot
Test requires wires with live electricity >>> this is not advisable without precaution
Stand on dry boards, do not touch anything metal, wear dry clothes, do not hold screwdriver in mouth, wear gloves, tape tester leads to wood sticks so hands are away from power
Remove wires from terminals
Separate wires so they can be tested
Turn on power
Test each wire to bare ground wire
Tester lights up on Hot wire(s)
If circuit is 120V, then there is only one Hot wire
If circuit is 240V, then 2 wires will test hot to ground >> these wires will be Hots 1 & 2
Test assumes circuit breaker is functioning normally.

How do you test for neutral?
If you have 120V line with only 1 hot wire, then one of the white wires will be Neutral?
Test Hot wire to each white wire
Tester lights up on neutral

Oct 17, 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

Wiring program timer switch model t1905 intermatic


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http://www.intermatic.com/products/timers/mechanical%20time%20switches/24%20hour%20dial%20with%20skipper.aspx
T1905 has 4 screws: NO normally open > NC normally closed > COM > Clock
NO screw is on left
NC screw is 2nd from left
COM is 2nd from right
Clock is on right

A) How to wire t1905 for 125V
You will have four wires >> a Black and White from breaker box; and a Black and White to load

1) Black hot wire from breaker connects to COM
2) White neutral wire from breaker box connects to Clock
3) White neutral wire to load connects to Clock
4) Black wire to load connects to NO -or- NC screw [one of these screws will have no wire attached]
NO turns 'off' with times set on timer
NC screw turns 'on' with times set on timer
If you want your load to turn 'on' when timer clicks 'on' then connect Black wire to NC screw

B) How to wire t1905 for 240V
You will have four wires >> 2 hot wires from breaker box; and 2 hot wires to load. These wires might be Black and White or Black and Red



1) Black hot wire from breaker connects to COM
2) Red or White hot wire from breaker box connects to Clock
3) Red or White hot wire to load connects to Clock

4) Black hot wire to load connects to NO -or- NC screw [one of these screws will have no wire attached]

NO turns 'off' with times set on timer
NC screw turns 'on' with times set on timer
If you want your load to turn 'on' when timer clicks 'on' then connect black wire to NC screw

Sep 10, 2010 | Intermatic Timer T1905 24 Hour Dial 120V...

1 Answer

I would like to replace a switch going to a fan with the 7299-NA


First you must determine which wires in the box are LINE and which are LOAD. Remove the wire nut from the two white wires and separate them. The LINE wires are the black and white wires that come from your breaker box. The LOAD wires are the black and white wires that go to the fan. You can determine this easily with a non-contact voltage detector (about $15). Or temporarily hook up a black & white pair to a lamp. In either case, make sure the exposed wires won't be touched and turn on the breaker for your test.
I will assume that you want the GFCI to protect the fan. Refer the picture (Back View) in the upper right corner of the front side (page 1) of the instruction sheet. If you lost the instruction sheet, you can find it on this page: http://www.leviton.com/OA_HTML/ibeCCtpItmDspRte.jsp?item=417265&section=11624&minisite=10021 Connect your black LINE wire to the upper right (LINE, brass) terminal. Connect your white LINE wire to the upper left (LINE , silver) terminal. Remove the yellow tape that covers the load terminals. Connect your white LOAD wire to the lower left (LOAD, silver) terminal Connect your black LOAD wire to one of the two switch leads with a wire nut. Connect the other switch lead to the lower right (LOAD, brass) terminal.

Jul 28, 2010 | Leviton 8299 Combination Switch / Smart...

1 Answer

How to wire to attic fan? Old Sping loaded timer has two wire connections Marked LINE and LOAD . There are two Romex- Three wire cables with Black , White (Common) and bare (Grd) wires coming into this box...


OK, your new switch will require the use of a neutral wire. So you will have to do what is called a pigtail. You will have to twist another white wire in with your other white wires to attach your neutrals to your switch. Note: white wires are called neutral not common. Hook the wires that were originally hooked up to your LINE to your HOT (Black) on your new timer, and the what was originally LOAD up to the new timer LOAD. SO as far as wiring all that will change is your white wires that need to attach to your timer NEUTRAL.

Jul 10, 2010 | GE 60minute Automatic ShutOff Timer Switch...

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