Most traditional Lutron dimmer switches (such as the popular Caséta wireless series) do not require a neutral wire for installation, making them exceptionally popular for retrofitting older homes where neutral wires are frequently absent inside standard wall switch junction boxes. Instead, these dimmers operate via a "two-wire" design that draws a tiny amount of leakage current through the attached incandescent, halogen, or dimmable LED light bulb to power their internal wireless radios. However, newer advanced Lutron models or neutral-required variants may specify a neutral connection for high-load or multi-location configurations. Verification: Inspect the wiring inside your wall box and check the specific product packaging guidelines to determine whether your exact Lutron model requires a neutral wire.
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