G
Guest 004
This dreaded fault popped up again!
Went to a newly installed job yesteday, which consisted of a ring circuit on a 32Amp 30Ma RCBO, where the sockets were of a module type, ie 2 sockets in a double gang box, but are actually wired individually within the 2 gang box. One of the sockets had the neutral and earth crossed. With the circuit energised the RCBO stayed on. When you plugged an martindale socket tester in everything was ok (load is <18Ma),. Fault was picked up only when the test machine was plugged in and loop reading was tried to be obtained, the RCBO then tripped.
Spoke to the manager about this, and his reply was 'why was it not picked up during the dead test?' I replied R1 Rn is not commonplace (defending the guy that did the dead test), and indeed you would still have to go to every individual socket to pick up the cross, which would make the test longer to do. He walked away shaking his head. Which left me questioning my own thought process.
So am I missing something here?
Any comments most appreciated!
Went to a newly installed job yesteday, which consisted of a ring circuit on a 32Amp 30Ma RCBO, where the sockets were of a module type, ie 2 sockets in a double gang box, but are actually wired individually within the 2 gang box. One of the sockets had the neutral and earth crossed. With the circuit energised the RCBO stayed on. When you plugged an martindale socket tester in everything was ok (load is <18Ma),. Fault was picked up only when the test machine was plugged in and loop reading was tried to be obtained, the RCBO then tripped.
Spoke to the manager about this, and his reply was 'why was it not picked up during the dead test?' I replied R1 Rn is not commonplace (defending the guy that did the dead test), and indeed you would still have to go to every individual socket to pick up the cross, which would make the test longer to do. He walked away shaking his head. Which left me questioning my own thought process.
So am I missing something here?
Any comments most appreciated!