A:Answer Just so you know...you are not supposed to run electrical cords through walls. The National Electric Code (NEC) states:
NEC ARTICLE 400 Flexible Cords and Cables General 400.1 Scope.
This article covers general requirements, applications, and construction specifications for flexible cords and flexible cables.
400.8 Uses Not Permitted.
Flexible cords and cables shall not be used for the following:
(1) As a substitute for the fixed wiring of a structure
(2) Where run through holes in walls, structural ceilings, suspended ceilings, dropped ceilings, or floors
(3) Where run through doorways, windows, or similar openings
(4) Where attached to building surfaces
Exception: Flexible cord and cable shall be permitted to be attached to building surfaces in accordance with the provisions of 368.8.
(5) Where concealed by walls, floors, or ceilings or located above suspended or dropped ceilings
In other words, running power cords through the walls is not a substitute for permanent wiring. You're supposed to have a new electric socket installed directly behind the TV, where you can plug in the power cord and coil up the slack to tuck underneath.
