Can a earth fault on a lighting circuit effect another circuit , this being ring main , only two circuits in flat, After changing a light fitting i came across an earth fault on the lighting circuit , I thought i had sorted earth fault out but the other circuit in the flat started tripping , when the lighting circuit cpc is removed from earth bar , nothing trips both circuits power up. With lighting cpc in earth bar ring main trips, not on rcbos.
Have you undertaken an insulation resistance test of both circuits ? - particularly N-E
Depending on the age of the flat it wasn't unusual to have a single earth conductor doing "everything" as it allowed smaller conduits etc to be installed in the structure
If you remove the lighting circuit CPC, do you have an "earth" at socket outlets.
Have you undertaken an insulation resistance test of both circuits ? - particularly N-E
Depending on the age of the flat it wasn't unusual to have a single earth conductor doing "everything" as it allowed smaller conduits etc to be installed in the structure
If you remove the lighting circuit CPC, do you have an "earth" at socket outlets.
