Four pigtails emerge from the backside of the switch—line, load, neutral, and ground—each of which must be connected via included wire nuts to the appropriate wires inside the wall.

Even if your home wasn't exactly built "smart," it is still possible to add HomeKit light switches without a neutral wire. Here's how.

If your smart switch has pigtails, like the one in our example, twist the like wires together (neutral to neutral, load to load, and so on) and secure each of them with a wire nut.

Leviton’s latest smart switch doesn’t require a neutral wire. Jennifer Pattison Tuohy is a senior reviewer focused on smart home and connected tech, with over twenty years of experience.

Christopher Null This being a simple single-pole switch with pigtails, it’s easy enough to install with wire nuts connecting the line, load, neutral, and ground wires to the wires inside your wall.

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