Originally Posted by G5Unit
Do I need to get CL2 certified HDMI and component cables if I want to run them behind the wall?
The simple answer is yes. You may not need CL2 per se, (CMX, CM, CL3, CL2X, CL3X, etc.) may be fine as well (assuming a residential application).
While installing this cable through the wall will likely not need an inspection and nobody will ever come to your house and say you shouldn't do that - I would hate to give the insurance companies any excuse to not reimburse you should there be a fire in your home.