Hello all,
Have been doing some work in a large building complex, the original building has a TNS supply but the large extension to the building has a seperate PME supply.
At present there are no main protective bonding conductors to water/gas/oil and these services are common to both old and new parts of the building. If these MPB conductors are taken to one of the origins (PME for example) I'm imagining that will cause issues by mixing two Earth potentials (PME potential on pipe work and TNS potential from cpc's). Have been looking through the BGB but can't find an answer to my question. Any ideas?
Have been doing some work in a large building complex, the original building has a TNS supply but the large extension to the building has a seperate PME supply.
At present there are no main protective bonding conductors to water/gas/oil and these services are common to both old and new parts of the building. If these MPB conductors are taken to one of the origins (PME for example) I'm imagining that will cause issues by mixing two Earth potentials (PME potential on pipe work and TNS potential from cpc's). Have been looking through the BGB but can't find an answer to my question. Any ideas?