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I had this wire left over and thought I might as well use it if I can. I think it will work but I just wanted to make sure! So can I use this speaker wire for the Rc and C terminals on my thermostat? The other end will be going to a 24volt AC transformer...more specifically: https://www.amazon.com/Elk-TRG2440-24VAC-Transformer-Fuse/dp/B0007N5LJK/ref=cm_cr_arp_d_product_top?ie=UTF8

Thank you!

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Typical "thermostat wire" is a NEC/UL type CL2 cable, just like your speaker wire says it is, so as a replacement for an 18/2 thermostat cable, this will work just fine.

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