How to Install an In-Line Cord Switch

Replace a standard lamp switch with an in line switch

Install the switch

Tired of reaching up under the lampshade to switch on your favorite lamp? Mount an in line switch on the cord. Several sizes of in-line cord switches are available at hardware stores, home centers and lamp specialty stores. Look at the tiny printing on the cord to determine which size switch you need, SPT-1 or SPT-2. In-line cord switches also vary slightly in design. Consult the instruction sheet before installation.

Note: Connect an in-line switch only to a cord with a polarized plug. A polarized plug has one prong wider than the other so you can only insert it one way into an outlet.

Photos 1 and 2 show how to prepare the cord for the new switch. Make sure you cut the non-identified (hot) wire only. It's the one without any indentations or ribbing.


Unplug the lamp before you start the repair.

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