Smart Home · Smart Light Switches
Do smart light switches require a neutral wire?
Reviewer consensus
Most Wi-Fi smart switches (Kasa HS200, Leviton Decora, TP-Link Tapo) require a neutral wire because they need constant power for their radios. The main exception in this roundup is the Lutron Caséta Diva dimmer, which does not require a neutral, making it the standard recommendation for older homes where the switch box only has a hot and load wire.