I have looked around and I don't see any thermostat cable around here that isn't "sunlight resistant" but we may have a few guys like George who asked the question years ago.
Once it is the consensus of most AHJs, that will be the only thing the supply houses stock.
Yet, around here, more often than not the "Armaflex type" insulation on the suction line is dry rotted and reduced to black dust after not too many years in the sun (insulation more or less missing). I wonder if at some point UV / sun tolerant insulation or insulation covering is a mechanical code issue, or certainly a voluntary material Spec issue?
(sorry for the side-track, but it is all one system)
