It's December, and you know what that means? 'Tis the season to get LED light strings and great timer-plugs. I love timer-plugs, and this time of year there are tons available -- ones that you can program, ones with "I swear I'm not out of town, so don't break in and steal stuff" randomizing schemes, ones that turn on automatically at dusk, and more.
However, there was one kind of timer switch that I couldn't find at all -- the kind where you say to it, "turn on now, then turn off in an hour." I've been wanting this kind of timer for a while, mostly for the rechargable things in my life, like cordless drills and other batteries. It's also great for things like iPods and cell phones -- unless the battery is totally dead, an hour or so of charging each day is more than enough to keep them full.
I couldn't find the kind of timer I wanted, so I decided to make one myself.
Materials and Tools:

- One power strip (or extension cord if you only want one timed outlet)
- One surface-mount plug box
- Two clamp connectors (sized to match your box)
- One timer switch (meant to be wired directly into your house, to control things like bathroom fans)
- Two of those plastic twisty wire connectors
You can get all this at Ye Olde Home Depot (though if, like us, you've been dabbling in electrical work, you probably have a bunch of it hanging around). You'll also need a wire cutter/stripper and a screwdriver.
How To:
- Cut the cord on the power strip, then separate out the three wires on each side and strip the last inch or so. Then remember that the timer switch actually has a strip gauge on it, and cut those little copper ends to match the gauge. Look, that little pile of copper bits looks just like Christmas! Try not to embed too many little copper guys in your thumb, because that smarts.

- Screw the clamp connectors into either end of your box, then insert the cord. Use those little twisty things (do they have names? Oh well.) to connect the green wires to each other, and the black wires to each other. Look, you're going to maintain the grounding wire connection*! How safety-minded of us!
*Truth be told, as far as we can tell, the grounding in our house plugs doesn't actually ever connect to, you know, the ground. I think our house was built by monkeys. Drunk monkeys.
- The white wires attach to the top-and-bottom of the timer switch. For our switch, we inserted them into little side holes and then screwed in the connection screws on top of them. Then stuff all of that stuff into the box and screw the timer into the box itself.

- Put the timer cover on (ours screwed on with a little tiny nut, then the dial itself slides onto the post), tighten all the screws on the clamp connectors, and voila! A timed power strip! We tested ours with LED lights, because I love those little guys. (Who knows why you would ever want to put LED lights on a timer. They only use 1 watt! Leave them up (and on) all year! Bother the neighbors!)

This is one of the easiest wiring projects we've ever done (even though one of us* ended up needing a band-aid), thanks to the generous box size (easy to stuff wires into) and the nice flexible wires (easy to stuff). It was fast and easy, and I'm looking forward to it helping us save power from now on!
* Not me.


Comments
Aaron
December 3, 2007 1:40 PM
The non-Eileen name for plastic twisty wire connectors is 'wire nuts'.
nowpicnic
December 4, 2007 12:41 PM
Nice! It's funny how electrical wiring is JUST NOT DONE in the US by anyone other than electricians. Sure, it can be dangerous if you do it badly, but the same can be said of driving a car.
Here in La France, light fixtures are *not* included in unfurnished apartments, so when you walk into your new home, there's nothing but twisty wires coming from the ceiling. It's a very strange sight to me, and figuring out where/how/what to get to install has been interesting for les Americains.
martinh
December 4, 2007 4:55 PM
Also, for safety's sake, you should connect the green ground wires to some metal on the box (or the green terminal on the switch) to provide a ground for the switch and box. Without it, there is a remote chance of getting shocked.
william larsen
December 5, 2007 9:15 AM
looking at your picture i see the switch on the neutral wires(white).this leaves hot (black)and ground(green)always on in your plug strip.people may think the power is off,but a connection between hot and ground or hot and another ground(anything grounded)could result in a shock or death!always switch the hot.
aaron
December 5, 2007 9:15 AM
Hi Martin,
Oddly, neither the box nor the switch had grounding connections. We thought that was weird, and then we connected the green wires together instead.
Eileen
December 5, 2007 9:20 AM
William, you are totally right. We should have connected the black wires to the switch, but that would have required me actually *remembering* which wires are which. (My confusion arises from the fact that much of our house is wired totally wrong, and now I am all confused in the head as to what color means what.)
aaron
December 5, 2007 9:23 AM
Hi Kathy (nowpicnic),
The French DIY lighting scenario is awesome. The American vs. French electrical skills reminds me of our New Zealand electrical experience.
We were wiring up several lights and a heater in the bathroom, and after inquiring about parts at the local hardware store, we were informed that it was illegal for non-electricians do electrical work in NZ -- even in your own home!
(We may have ignored that last bit when we found the right parts).
william larsen
December 5, 2007 9:31 AM
in your first picture look at the electrical box.inside on the lower right is a spot for the ground screw or a grounding pigtail wire.you people are totally cool for thinking of these things!home depot has basic books on wiring.encouragement not discouragement.
eileen
December 5, 2007 9:51 AM
Good lord, why don't they label those silly grounding spots? Personally, I have a conspiracy theory going that grounding is all just a plot by the copper industry (also the "green screw" industry) to get us to buy more of their products.
aaron
December 5, 2007 11:26 AM
Thanks for the pointers, William.
We'll definitely change the switch to be connected to the hot wires. We'll also put in a grounding pigtail to the box (so conveniently shown in the picture!). While the risk of shock from what we're plugging in is small, it's definitely better to be safe.