sockets circuit

Last night I turned one of my sockets on and then all of a sudden it stopped working, nothings tripped, and then I find out another one isn’t working, so I turn off the power and search behind the 2 sockets to try and find an obvious issue, but all looks good everything secure, but it’s only the...

I'm going to install one of those stair lighting systems where a controller illuminates each step, about ½ second apart, once triggered by a PIR sensor. The controller will be powered by a 24v transformer, and I'll be installing a mains switch for it. Which circuit should this be connected to -...