Just thought someone could give some advice on powering up wall mount tv.
I have a 46" wall mounted LCD bedroom tv but my cables are not hidden in the wall.
My plan is to run them in the wall up into the attic and then back down to the AV equipment. Total length 20ft.

I just got my cables the other day 25ft component and L+R audio from Infinite Cables Inc

Running the cables is no problem for me (15years in Hvac) but im not sure how i should power the tv?

Should i install an in wall receptcal or could i just run an extension cord with the other cables?

I think your best bet would be to start by finding out what your local electrical codes allow/require. I doubt that includes running extension cords inside walls. My guess is that a well-placed outlet will be the best solution.

I wouldn't run power next to any cables.
You could run conduit or raceway.

Both of these places carry it.

http://www.lextec.com/ven_hubbell.html

http://access8.com/Raceway-Cable-Management-Canada/

Is there a plug in near the tv at all? Remember your TV is fairly wide. I'd just take power off of that. Sometimes you luck out that your TV spans across a few studs and the outlet is reachable without making any extra holes.

A tinbasher! Sparky here.

Put this behind your TV location at 5' or so to center. Your mount can go just over or under it (usually under so your TV can tilt forward freely and not run into cables.) You can get multiple gang versions if you want to plate your HDMI and data seperately. Pretty flexible. We often install brush plates and pass the cable through -bypassing any connection and future proofing. Pigtail power off a receptacle below ideally.

https://www.amazon.com/Arlington-TVBU505-1-Recessed-Outlet-2-Gang/dp/B003E48COU

You can put one at your gear\rack location as well and free air the low voltage in wall as long as the cables are in wall rated. Don't pull an extension cord into a wall. If you have an existing receptacle below you can add a drywall mount low voltage ring and leave your receptacle below as is.

http://www.homedepot.com/p/1-Gang-Non-Metallic-Low-Voltage-Old-Work-Bracket-SC100RR/100160916

Resurrecting a 10 year old post?

better late than never

well, it fooled me