Temporary set-up: 3-way, one box no neutral. Safe for now with 1 Smart Switch? - Connected Things - SmartThings Community
Do you have to ground a light switch in a plastic box? - Quora
How To Replace A Light Switch in a 2 Wire Non Grounded Haunted Home! - YouTube
Single pole no neutral, no ground, 3 wires? I'm trying to understand what's going on here. I really wanted to wire up a z-wave switch, but alas... No neutral. But no ground
electrical - Is a ground required when replacing an old single pole single throw switch? - Home Improvement Stack Exchange
3-way LZ31-SN No Neutral wire - GE AUX faiils to turn off - Wiring Discussion - Inovelli Community
What should I do if there is no ground wire in switch? It seems my switch is connected to neutral wire but not ground wire. I'm trying to install a smart dimmer :
How bad is it if light switches are not connected to ground? : r/homeautomation
12 No Neutral Smart Switches (options for every setup)