Electricity can kill, so it is very important to be careful while working with it and to use safety equipment. If you are not competent working around electricity have an electrician do the wolrk.
Do It Yourself - Home Page
If you thought dimmers were about as fancy as switches could get, think again.
There's a whole world of specialty switches out there just waiting to make your
life more convenient, and they're every bit as easy to install as an ordinary
dimmer.
Timer switches and solid-state programmable switches can turn fixtures on and
off when you're not around. And motion-sensor switches will turn on the lights
when they sense your presence so you're never in the dark. Be aware, though,
that some of these switches require a neutral wire connection so they can't be
installed at the very end of a circuit. Don't worry-we'll show you how to tell
what will and won't work in your installation.
2 Steps
1. Timer switches have three preattached wire leads. The black
lead connects to the hot wire, and the red lead connects to the wire that
carries power to the light fixture. The remaining neutral lead is connected to
the neutral circuit wires. After a power failure, be sure to reset the switch
to the proper time. (If the circuit you're working on doesn't have a neutral
lead, an analog timer switch won't work. Use a solid-state programmable model
instead.)
2. Solid-state programmable switches require no neutral wire connections.
That means they can be installed in switch boxes containing either one or two
cables -- at the end of a circuit run or somewhere in the middle. Both wire
leads on the switch connect to hot circuit wires with wire connectors.