While it might look like a simple bundle of colors, choosing the wrong gauge or core count can lead to connectivity drops, blown fuses, or a system that won't turn on at all. Here is everything you need to know before you head to the store. 1. Decoding the Numbers: 18/5, 18/2, and Beyond
If you are buying wire for a (like Nest or Ecobee), do not settle for anything less than a 5-conductor cable. Learn about the common or C wire - Google Nest Help buy thermostat wire
The Ultimate Guide to Buying Thermostat Wire: What Every Homeowner Should Know While it might look like a simple bundle
This is the number of conductors (individual wires) inside the cable. 2-Wire: Heating only (older boilers). buy thermostat wire