Di log socket tester c w rcd test earth volt test dl1092 di log dl1092 p the di log dl1092 socket tester rcd test earth volt test is a simple and reliable test for correct socket wiring when power is detected the socket tester will give a clear visual and audible indication of wiring status the led will also light as an indication of a wide range of wiring conditions p p this plug is a fast and easy way to ensure 13a sockets are wired correctly the socket tester allows for awkw