- Reaction score
- 36
Hi all , my question for your brilliant minds is (ill first set the scene)
35mm 4 core swa coming from an external supply, 16mm earth ran out to an earth rod(ze at the distribution board main switch 0.35ohms)
now this is quite a large installation with a 3phase distribution board in the basement which also feeds a 3phase distribution board on the ground floor, and this installation is a large domestic new build house
now the question is: currently all lighting and sockets as well as any circuits that are installed in twin and earth/ hidden in ceilings etc are covered by 30ma rcbos , however the following are only covered by the 100ma rcd protection of the main switch (external air-conditioning / lift supply and pumping station)(all just standard c type mcbs)
am i right in thinking thinking this set up is ok ? or do i need to replace the non 30m rcbo fed circuits with 30ma rcbos
thank you for any responses in advance
35mm 4 core swa coming from an external supply, 16mm earth ran out to an earth rod(ze at the distribution board main switch 0.35ohms)
now this is quite a large installation with a 3phase distribution board in the basement which also feeds a 3phase distribution board on the ground floor, and this installation is a large domestic new build house
now the question is: currently all lighting and sockets as well as any circuits that are installed in twin and earth/ hidden in ceilings etc are covered by 30ma rcbos , however the following are only covered by the 100ma rcd protection of the main switch (external air-conditioning / lift supply and pumping station)(all just standard c type mcbs)
am i right in thinking thinking this set up is ok ? or do i need to replace the non 30m rcbo fed circuits with 30ma rcbos
thank you for any responses in advance