Question about Cooper Industries Cooper Wiring 274W Switch and Outlet

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Cooper 274W combination single poe switch and grounded receptacle

Where do the h ot wires go -- black, white and ground

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Black to gold, wht to silver grnd to green

Posted on Apr 21, 2009

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I live in an old house and im changing a single switch to a switch and receptacle combo and i have wired it every way to sunday the light works but the receptacle either does not or it also turns on light ...


Open following link for specific wiring illustration and tips.
http://waterheatertimer.org/How-to-wire-Cooper-277-pilot-light-switch.html#combo

Single pole switch has 2 wires: These wires are Hot wire from breaker, and wire going to Load (light).

Combo device needs additional neutral wire.
Without a neutral wire, the combo outlet will not work.
Neutral wire connects to silver-colored screw. Neutral wires are the white wires that are twisted together and covered with wire nut and pushed to back of electric box.

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Sep 05, 2011 | Cooper Industries Cooper Wiring 274W...

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I have a light switch like this, I have 2 black wires and 2 white wires only. THe house was built in the 60's, I found I black wire that is constantly hot, how do I wire up the plug,light switch so...


Bit more information is needed.
Wire color is not as important as knowing what wire is for.
Knowing Hot black hot wire is good step.
Next, see if box has neutral wires. Neutrals are usually white wires that are twisted together and covered with wire nut. Test black hot to each white wire to find neutral.
If box does not have neutrals, then this device cannot be wired to code.
Other black wire probably goes to light.

Open following link for illustration of wiring:
http://waterheatertimer.org/How-to-wire-combination-switch-outlet.html

Aug 01, 2011 | Cooper Industries Cooper Wiring 274W...

1 Answer

Cooper TR274 common feed Single Pole Switch w/ grounding receptacle I have power at the receptacle but the switch does not work the light I wired in as the load. The hot lead feeds both switch and outlet...


Normally a socket needs both black power in and white ground out.
Normally a switch only needs the black power in and black power out to the device.
With a switch, the white return from the device goes directly to the white out, with a wire nut.

So you have a good reason to be a little confused with a switch and socket combination.

Normally I use an ohmmeter to figure out all the screws on a device like this first. But now that you have already connected some wires, you can probably just use a neon test light.
I think you are probably correct that the power is easy.
So put a neon test light with one lead on the white ground that came with the black power, and see which screw changes as you throw the switch.
If you don't get anything, then try directly from the white to black.
The screws should have some color coding. Brass for black, and chrome for white. There are often 2 black power screws because one is input and the other is for piggy backing off to the next device. There should be 2 white screws, one for the outlet and one back from the device. But there has to be another out from the switch to the device. I normally wire that in black as well. But hard to say what color this combination would use.

Jul 26, 2011 | Cooper Wiring Devices 274V-BOX DECORATOR...

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Cooper 274W Combination Device. Can the device be wired so that the sitch controls the recepticle?


Yes. For each half of the device there will be two terminals, plus one ground terminal. (total 5) For the receptacle, one terminal will be brass and the other will be silver. These two terminals will be on opposite sides of the receptacle, but both will be nearest the receptacle end. The other two terminals are for the switch, and their color is not important. You must place a jumper wire from the brass terminal of the receptacle to the nearest terminal of the switch. There might already be a tab connecting these two terminals together - if so, then you don't need the jumper, just tighten down these two screws. You will wire your incoming black wire to the other switch terminal. Your white wire goes to the remaining terminal which is for the receptacle and will be silver. Your ground wire goes to the green ground terminal. Good luck, Al K

Jul 06, 2011 | Cooper Wiring Devices Combination Switch &...

1 Answer

I"m installing a Cooper Devices


Wiring is suspect.
Black hot wire connects to dark screws.
Break off tab should be intact.
White neutral wire connects to silver screw.
Wire going to switch load connects to brass screw.

Jun 18, 2011 | Cooper Industries Cooper Wiring 274W...

1 Answer

I have four wires; 2 black and 2 white. I need to know how to wire 274w.


The 2 whites from the Romex cable go together along with a jumper. Now, the neutral jumper from the white bundle goes to the SILVER screw terminal one the side of the outlet where the LONGER slot is.

The black wire (load/light side), goes to the brass screw terminal on the SAME side outlet.

The OTHER black (line/HOT) wire goes to the opposite side of the switch, the side that has the connecting tab.

The grounding wires go together and then get connected to the box ground.

Feb 02, 2011 | Cooper Industries Cooper Wiring 274W...

1 Answer

I have a black/white/ground wire coming from my power supply into my bathroom. I want to install a 274w combination device so as I can have one plug outlet and a switch for the shower fan.I need to see a...


1) In this situation we need to test the wires.
Electricians don't guess, they test, and a diagram would be guessing which wire color does what.

2) FYI: non-GFCI receptacle located in bathroom is not code, and device will have to be replaced when property is sold. The reason for GFCI is the likelihood of you holding defective electrical gizmo from China in one hand while putting other hand in running water. Or electrical gizmo falling into bathtub occupied by wife with large life insurance policy.
If you have kids using that bathroom, I want you to avoid using non-GFCI device.

3) Your new device has color-coded screws: Dark, brass, and silver.
These colors tell electrician how to wire the device.

4) Let's test to see which wire connects to which screw:
Separate wires.
Use ordinary 2-wire tester from hardware store.
Tape tester leads to wood sticks so hands are away from power.
Turn power ON.
Test each wire to bare ground wire.
Tester lights up on Hot wire. Hot wire connects to dark-colored screw on device.
Hot wire is identified.
Test Hot wire to all other wires in box, except bare ground wire.
Tester lights up on Neutral wire. Neutral wire connects to silver screw, and will complete circuit to receptacle.
If box does not have a Neutral wire, the circuit to receptacle can be completed using ground wire on silver screw, but I am not recommending that.
Last wire goes to Load (light, fan, motor). Load wire connects to brass screw, and will complete circuit to Load.

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Leviton and Lutron both make GFCI switch-outlet combo.
Buy at Home Center or on-line
Leviton 7299
http://www.amazon.com/Leviton-7299-NI-15-Amp-125-Volt-Combination/dp/B000UJADW6
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Jan 02, 2011 | Cooper Industries Cooper Wiring 274W...

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Cooper Industries Cooper Wiring 274W Switch and Outlet I need help installing this switch/outlet combo...I have 3 wires...a black, a red, & a copper. I hooked the copper to the green terminal, the...


Switch-plug combo:
bare ground goes to green screw
dark screw goes to hot from breaker
silver screw to neutral
brass screw goes to load (light)

Add a comment any time
You are replacing single pole light switch?
Single pole switch has 3 wires: black and red and bare copper

New device has 4 different colored screws: green, dark, brass, silver
Bare copper goes to green screw.
Black wire goes to dark screw
Red wire to brass screw
Nothing on silver screw for a moment. Test circuit and make sure light turns on-off.
If lights works, then good so far.

Now let look at silver screw. Neutral wire has to connect to silver screw.
In back of your electrical box are white wires twisted together and covered with wire nut.
These are neutral wires.
You must connect another short piece of insulated wire to these neutral wires and run that wire to silver screw.
The neutral wire will complete circuit to receptacle.
If you do not have neutral wire, then receptacle will not work in that box without additional wiring.

Hook up neutral wire to silver screw.
Now turn on power and click switch again.
If circuit breaker trips, then reverse your red and black wires.
Otherwise this should be correct wiring.

Dec 08, 2010 | Cooper Industries Cooper Wiring 274W...

1 Answer

I need a wiring diagram for a 274A Light switch/ plug in. Everything we try, we are not getting anywhere.


There are more than a few ways to wire this device. The switch box where the device is installed _must_ have a neutral wire for the receptacle to work. This is usually a white wire.

The switch box should have at least 2 cables in it. One cable is the incoming HOT(black) and neutral(white) from the circuit breaker panel (or source). The second cable is the outgoing switch leg(black) and neutral(white) to the light. Each cable should have a bare equipment grounding wire.

The most common way to install this device is to connect the hot wire to one of the black screws, pick one. ( I'm assuming that you have _not_ removed the brass tab between the 2 black screws.)

The 2 neutral (white) wires are twisted together under a wirenut along with a pigtail which connects to the silver screw on the device.

The black wire that goes to the light (switch leg) is then connected to the brass or gold screw.

The bare ground wires are twisted together under a wirenut along with a pigtail which is connected to the green screw.

Aug 28, 2010 | Cooper Industries Cooper Wiring 274W...

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