Hi, I've never used a socket tester before but I bought one because I wanted to install a new socket in the living room, it's a TIS brand one from tool station cost around £15. When I bought it home I thought I'd test it in a socket to see how it worked. However I plugged it into the same socket which had a phone charger plugged in but not switched on. When I turned the tester socket switch on, it sparked and tripped the power is this just because I left the phone charger in or do I have to unplug everything on the circuit or is it just a dodgy tester.
Thanks
Thanks
