Then a large current will flow and the OCPD'S will operate. There are loads of people in commercial and industrial maintenance who don't really know what they are doing too!! :)
Hi Mate
Your 1552 will only test Type A and AC. The DC option is for testing DC sensitive RCD'S (not Type B). If you are testing Type B RCD'S you will need to upgrade.
The 1730 will test Type B RCD'S.
Hi Sean
Yes, you are right. Your experienced sparky mate should know better lol :). The load is undetermined as feeding sockets so it would have to be based on protective device rating. The cable is undersized. In fact, due to the insulation, you should also add rating factors to that which...
Assume it is single phase.
Not sure what the regs are in Germany. Over here that would get a 30ma 61008 RCD (>16A) in series with a 60898 C16 or instead a 61009 C16 RCBO would be the order of the day.
2.5 or 4mm circuit conductors dependant on PFC at origin, install method, length of circuit...
As above. Circuit protection is often altered in these upgrades. (3036 to 60898 OCPD's for example) so to confirm ADS, Zs would have to be taken and recorded as a minimum. Additional protection by RCD may well have been added too and these would also need testing and recording to prove satisfactory.
Sorry OP you need an electrician with an insulation tester who can use it properly. A good spark will find the offending circuit very quickly and then investigate that circuit to pinpoint issue.
Save your money on the RCD replacement which won't be required and pay an Electrician to locate the cause of the imbalance. The RCD tripping does not mean it needs replacing lol.
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