I have this 230 to 6V rms step-down transformer. I use it to observe the mains voltage.
But recently I needed to create some interference or spike in the mains. So I first tried the following:
I used a filterless power strip. I coupled the transformer's primary side to one of the sockets of the power strip. And at the adjacent socket I plugged a heat gun. I sometimes very randomly saw some tiny fluctuation and that disappeared.
My approach was to see the interference from the nearby AC socket. What type of load would create a visible interference or spike? Or is there any other practical way to achieve this. I want to create a spike or interference by a load and observe that from a nearby AC socket via a scope and a transformer.
More over is there a safe way to observe the Line to earth or neutral to earth voltage on scope? I mean if I use the transformer secondary for the line can I connect the scope ground to the mains earth safely?