I know there are many posts related to this but of the ones I have read, none of them appear to answer my questions specifically.
I have a dual 30mA RCD consumer unit in the house which is on a PME supply. I would like to supply the garage from one of the MCB's. I have a small CU in the garage which is also 30mA RCD protected and would like to put it on a TT system with an earth rod.
I have 2 questions: -
Am I right in thinking that the SWA has to be protected by the MCB and RCD in the house and not by the TT system - I know that the the earths have to be seperated from each other.
How do I achieve descrimination if the supply is through an MCB protected by the 30mA RCD in the house and the 30mA RCD in the garage.
Thanks in advance for any help.
I have a dual 30mA RCD consumer unit in the house which is on a PME supply. I would like to supply the garage from one of the MCB's. I have a small CU in the garage which is also 30mA RCD protected and would like to put it on a TT system with an earth rod.
I have 2 questions: -
Am I right in thinking that the SWA has to be protected by the MCB and RCD in the house and not by the TT system - I know that the the earths have to be seperated from each other.
How do I achieve descrimination if the supply is through an MCB protected by the 30mA RCD in the house and the 30mA RCD in the garage.
Thanks in advance for any help.