Electrical Wiring Tips: What Is Hot, Neutral, & Ground Wire?
Fast-Stat 1000 and Common Maker - Installation Guide – Simple
Thermostat C-Wire: How it Works on Your Thermostat | Honeywell Home
Wyze Switch: neutral wire question - Power & Lighting - Wyze Forum
Newbie: Any way to add a c wire to existing transformer or wires? Do I need a new transformer with a “c” terminal? (Trying to connect a Wi-Fi thermostat to control boiler) :
How To Add A C-Wire To Your Thermostat: An In-Depth Guide