UTP Cat-5 wiring): Is plenum cable any better than PVC?
Plenum rated cable is required by some fire codes if you run wiring in locations where the HVAC system moves air — above suspended ceilings and through cold air returns, for instance. This cable is designed to withstand higher temperatures than ordinary PVC jacketing and burns less readily than PVC. For most homeowners, plenum rated cable is probably not necessary and typically costs 2-3 times more than PVC. There is no electrical difference between the two, and either will perform equally well.
