63a RCD?? :shakehead I stand by my earlier statement you clearly lack understanding of RCD's
and are working out of your depth..
Not pedantic...
Just offering thoughts that you asked for as to why you are struggling to resolve your problem..
i.e. you should have.....
Design your alteration.. (ensuring all appropriate protective devices and cable sizes are selected)
Install your new cables etc..
Do DEAD tests.. (As per BS7671 wiring regulations)..
If dead tests are satisfactory, then you can look at energising the new alterations.
then you do your Live tests..
(And then document them onto the appropriate electrical certificate..
and if this new circuit is in England or Wales, you would then also notify it for Part-P building regulations compliance..)
had you done this.. you wouldn't have the problem you now have!!!
Just because you are posting a question in the DIY section,
doesn't mean standard industry guidance no longer applies..
Or that it will prevent electricity from causing serious or fatal injury to a healthy adult in less than half a second....
I repeat: Safest advice..
Leave well alone..
await someone competent to correctly test & re-energise the installation..
