Southwire 64169622 5 Conductor 18/5 Thermostat Wire, 18-Gauge Solid Copper Class 2 Power-Limited Circuit Cable, 50-Feet, Brown

Great cable for wiring up your nest, echobee, etc. Stiff and somewhat difficult to pull but great once it's done. Better than using cat6.

Lo que necesitaba para conectar mi calefaccion a un termostato inteligente.

Given a trip to the Depot woulda costed more in gas and effort than ordering them here I opted for the sensible route. The item worked as expected, providing a much needed connection for my video doorbell

Product came as a spool (50 ft 18/5), appears correct, new, Southwire brand. Wire colors are red/blue/white/yellow/green, brown jacket. Has that handy "thread" also, that allows you to easily split the jacket open. Measured thickness for solid core looks like 18AWG. Internal colored insulation is thin, but presumeably adequate for the 150V rating. The 4th image shows a piece of the blue wire compared to an older (black) thermostat wire (from an 18/2 cable) that had a thicker insulation layer.

Good wire for my new thermostat and relays. I installed it about 2 months ago and it is still working great.

Works great, solid core and durable.