Cable for wiring nest thermostat
Has anybody had to run new wiring for a nest thermostat or similar?
What type of cables did you use?
Where did you get them?
Nest recommend the following
The Nest Learning Thermostat does not support stranded wires.
If your low voltage wires are stranded (each of the low voltage wires is made up of lots of smaller wires), you may run into this error. Reinstall your previous thermostat and contact a Nest Pro installer to have your thermostat wiring replaced or adapted to work with the Nest Learning Thermostat.
The Nest Learning Thermostat wire connectors require 18-22 gauge solid-core copper wires.
Wires are too small
The Nest Thermostat might not sense your wiring if the wires for your heating and cooling system are too thin. The Nest Thermostat requires wires between 22 and 18-gauge, which is standard for residential heating and cooling systems. Anything smaller than 22-gauge wire could be too thin for the Nest Thermostat to detect.
If you aren’t comfortable replacing the low voltage wiring in your system yourself, contact your local HVAC professional for help replacing these wires.