I'm looking to wall mount my TV but this requires the power and aerial cables to be run along the walls/ceiling to the power point, which is approx. 7m away. So I need to extend the power cable. Basically, I want to cut the original TV power cable at the plug and splice it onto a length of cable that I can then run to the power socket. But what type/gauge of cable do I need to buy? Many of the ones I have been looking at say that they are designed to be run under plaster and are non-flexible. The aerial cable is a basic coaxial so this is no problem.
What I do in similar circumstances is to use a pair of these: https://www.maplin.co.uk/search/?text=euro+connector close to the TV. That way, if you get problems with the TV you can easily break the connection to remove it from the wall.
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