Electrical

How can I tell if the wires behind a blanking socket are live

Anonymous user 23/02/2024 - 3.40 PM

I realise this is a very basic question but I’d really appreciate some help. I decided during a rewire that I no longer wanted an electrical socket in the wall for my TV as I’ve chosen one that mounts flush to the wall. The electrician was reluctant to lower it as I requested and instead said he would “make it off”, and it now has a thick blank plate on it. I need to replace this with a 2mm plate (or just remove it completely) but the TV installers won’t do that if the wires are live. If I switch off all the power, is there a way, by sight, to know if it’s still live or if it’s been made dead in some way. Again apologies for my ignorance here but I’d really appreciate some help. Thank you so much. Thanks again