View Full Version : HDMI commerical cable ratings CL2P vs CL3P
02-01-2012, 05:21 PM
Does anyone know the differences between CL2P and CL3P hdmi cables?
The P indicates it's for use in plenum spaces. (ex: a plenum ceiling is typically when the space between the ceiling tiles and above slab is used as a return duct for the HVAC system, the plenum rating helps reduce toxic gases from being spread thruout the building.
02-03-2012, 10:28 AM
As far as I know CL@ is rated to 150V and CL3 is rated up to 300V
02-11-2012, 09:14 PM
BTW Here's a NEC substitution chart by Carol cable thats made by General cable.
CL2 is for class 2 circuits, CL3 is for class 3 circuits:
03-26-2012, 10:34 PM
That adds in understanding the difference between CL2 and CL3 which seems mostly related to how much voltage\power the cable can handle.
That said I still haven't seen how to determine if a hdmi Cl3 rated cable is needed or required over a CL2 rated cable, since the hdmi standard seems limited to 5.3v volts.
hdmi voltage specs in post #11 at
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