I have a multimeter.
Yes we had a new RCD unit fitted about 2 years ago when our electricity meter was moved from inside the house, to an electrical box on the outside of the house.
Our stairs has a light at the bottom of them and a light at the top. The two lights are not independent of each other but there is an upstairs switch and one downstairs. So the lights can be turned on or off from either switch. I've recently found there is a current going through the earth of...
