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

It's fine. It's exactly what it says it is- 18 AWG solid copper wire. Solid wire is less flexible than stranded wire, so you can ignore any reviews complaining about thickness or stiffness.

Good quality thermostat wire. I upgraded my thermostat from a 'dumb' thermostat to a wifi programmable one, and needed a power wire (the 5th wire). I was able to pull the new wire in the wall by hooking the new wire to the old wire and pulling it up through the wall. It made replacing the wire very easy.

I installed a new smart thermostat on a 40 foot run with this wire and everything worked beautifully. It's a solid18ga copper wire, as measured with my stripper, that is safe for longer runs. Less expensive 5 wire products on Amazon claim to be 18ga but are actually 20ga, which is not up to code and not recommended especially for runs over about 15 ft. This wire handled and stripped well and there were no defects except the plastic spool arrived broken because Amazon shipped it in an envelope instead of a box.

The gauge is what it is, so reviews mentioning thick or thin wire don't necessarily apply. And the insulation is adequate for the power it's expected to carry. That being said, it's possibly the most ridged 18Ga copper wire I've ever used. I needed to unspool and straighten it before routing, and termination was made more difficult due to the stiffness. But, it is good quality and provided standard HVAC wiring for the addition of a common to use modern smart thermostats.

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

Hunted far and wide to find some of this wire to buy - but apparently now that most HVAC systems use smart wireless thermostats the hardware stores don't carry it anymore. One building supply place I tried - the employees didn't even know what I was asking for - and when I compared it to telephone wire, they didn't know what that was either. Sigh - I must be old. I was doing some work on my compressor unit outside, and wanted to run new wire between it and the unit inside. This wire was perfect for doing that and the length was more than enough to get from point A to point B. Was expecting to pay more than this - so the cost was just right. Haven't had any problems, so I'm happy with my purchse.

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

I used this to replace an ancient two-wire thermostat "cable" that was left in place after our old furnace and thermostat were upgraded. With the additional conductors, the thermostat now has a functioning "Fan" button, and it's also powered by the furnace, eliminating the need for batteries. My local hardware store sells comparable 18/3 cable for 49 cents a foot, so this 18/5 is quite reasonably priced. The cable's outer jacket isn't as tight as it appears in the illustration, and was easy to strip. There's actually a nylon fiber "ripcord" inside, much like you find in Ethernet cables. The individual conductor insulation is thin (I can actually strip it with my thumbnail), but still adequate. The conductors don't seem brittle at all; they're nice solid copper.

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

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.

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.

Works great, solid core and durable.

Good cable, did the job. A bit pricey for what you get - can buy an entire spool at local building supply store for only a little more.