B
Bessie
I recently installed about 10 (user supplied) Trendi Switch 2-gang sockets. When tested with a socket tester, 4 of them reported an earth fault on just one side only. I told the customer to take them back, which he did. However, when he replaced one of them with a new item, he got the same fault. After a bit of playing around he discovered that if you tighten down the unused earth terminal, the problem seems to go away. Haven't measured Zs yet to see if there is any difference, but this is the first time I have come across this requirement in a 2-gang socket.