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hope someone can help. ive fitted my first fcu with built in rcd today for a power shower feed. all went fine until i came to the rcd test. there are no rcds or rcbos in the existing installation hence the reason for me fitting a FCU-rcd. tried testing at shower but test meter kept saying less than 100v so wouldnt do test. checked the voltage and it was 233v. tried testing at fcu on load side got 230v but as soon as i tried to rcd test got same problem - less than 100v. tester is megger 1552. is there a different method of testing these as opposed to an rcd or rcbo in the consumer unit. also are these an bs7288.
cheers wayne
cheers wayne