Article: Look for printing which says either SPT-1 or SPT-2. The printing is small, so you might have to look carefully. The difference between SPT-1 and SPT-2 involves the thickness of the lamp cord. Some switches only require you to connect the hot wire. If this is the case, there will be a channel along one side of the switch for the neutral wire. You may be able to open the casing of the existing switch and remove the wires without cutting them, but if not, use wire cutters to cut as close to the switch as you can. Try to avoid cutting the neutral wire. If you have to cut it in order to remove the old switch, strip the insulation and connect the cut ends of the neutral wire together. If you like, add a plastic connector to protect the wire at the location where you want your new switch to be. If you are adding a cord switch when there wasn't one before, use a small knife to carefully split the cord where you want your new switch to go, then cut through the hot wire. If your switch requires you to attach the neutral wire, cut through that too. Use your wire cutters to make a notch in the wire insulation, then gently pull to remove it. Only take off as much insulation as you need to attach the wires to the screws in the switch. If you only have one screw, it's for the hot wire. If you have to connect both the hot and neutral wires, the hot wire goes to the brass screw, and the neutral wire goes to the silver screw. Use your fingers to wrap the wires around the screws securely, and make sure there is enough insulation on the wires so that no live wires will be exposed when you close the switch. There should be no visible wires showing when the switch is assembled. All you should see is insulated cord. If the exposed wires are too long, use the wire cutters to snip off a small portion and reattach the wires to the screws. Make sure that the cover closes securely and there are no bare wires showing around the switch. If you're confident that the switch feels like it's securely connected and there are no live wires showing, it's time to test out your lamp! If you hooked everything up right, you should be able to plug in the lamp and turn it right on. If the lamp doesn't turn on, double-check your wiring and try again.

What is a summary?
Look for printing on the lamp cord to determine the size switch you need. Examine your new switch to see which wires you have to cut. Remove the existing cord switch. Strip about 12 inch (1.3cm) of insulation off of the wires. Match the hot and neutral wires to the appropriate screws. Insert the stripped wires into the screw terminals. Close the cover on the switch and snap or screw it shut. Plug in your lamp and try out your new switch.