The 415V 63A 4-Pin Appliance Adaptor converts a 4-pin 415V 63A socket to a 230V 13A plug and has a short 30cm length which minimises resistance during testing. It is compatible with any PAT tester and allows testing on three-phase appliances that are usually found in industrial and manufacturing settings. It is suitable for performing earth bond testing and insulation resistance testing but is unsuited to load/leakage testing or touch current tests. It should never be connected to a mains socket.