OP
- Reaction score
- 143
Update went to site couple of days ago and probably back there tomorrow to look further into it all,
So as I think I said 1 x B50 Hager rcbo at 30mA supplying house c/u and then all circuits there are on standard Hager mcb's carried out rcd ramp test and auto test and always tripped rcbo supplying c/u at 21mA rising or falling waveforms and then tried IR also as only 4 x sockets in room which is the issue ! one in hallway apparently done away with as it "melted" I was told !
IR was starting at around 2.6Meg at 500V and rose to around 3.6 Megohms / Megaohms as it dried the cables out. Not good at all, one socket backbox was different.... in the way that a piece of wood much bigger had been screwed onto the wall to effectively blank off the metal box and on wood had been fitted a 2 gang pattress and double socket outlet, I thought that was strange so I unscrewed it to be nosey, and found that the said dampness in room had turned the original backbox into flakes of rusty steel and no longer had any real resemblance to a metal back box at all and cables x2 twin and earths were covered in either oxidisation / verdigris or green goo or both ! Now barring the computers and other weird and wacky electronic kit in there I'm not surprised the rcbo trips on occasion ! taking the entire house c/u out in the process. Now I have got myself a B50 Hager mcb to replace the rcbo feeding the house c/u and a couple of rcbo's to put on the sockets down where issue is from main house c/u to test if that holds better ? whether dampness or the computers etc.. also Zs readings were fine and weird one which I haven't seen before is what looks like normal ring connected 2x 2.5mm's in sockets but at c/u a single 4mm twin and earth at 20A mcb ?? like it leaves now on a 20A radial arrangement and is somewhere jointed onto a ring as it links sockets ? Surely not on ? even though is only on a 20A as a radial so covers the 2.5's ! Only other option is to rewire the room with new cable and hope the damp gets sorted sometime, but only way she'll entertain that is via mini trunking surface on hall ceiling from c/u and then along high on walls of room and dropping to each socket all surface mounted.
So as I think I said 1 x B50 Hager rcbo at 30mA supplying house c/u and then all circuits there are on standard Hager mcb's carried out rcd ramp test and auto test and always tripped rcbo supplying c/u at 21mA rising or falling waveforms and then tried IR also as only 4 x sockets in room which is the issue ! one in hallway apparently done away with as it "melted" I was told !
IR was starting at around 2.6Meg at 500V and rose to around 3.6 Megohms / Megaohms as it dried the cables out. Not good at all, one socket backbox was different.... in the way that a piece of wood much bigger had been screwed onto the wall to effectively blank off the metal box and on wood had been fitted a 2 gang pattress and double socket outlet, I thought that was strange so I unscrewed it to be nosey, and found that the said dampness in room had turned the original backbox into flakes of rusty steel and no longer had any real resemblance to a metal back box at all and cables x2 twin and earths were covered in either oxidisation / verdigris or green goo or both ! Now barring the computers and other weird and wacky electronic kit in there I'm not surprised the rcbo trips on occasion ! taking the entire house c/u out in the process. Now I have got myself a B50 Hager mcb to replace the rcbo feeding the house c/u and a couple of rcbo's to put on the sockets down where issue is from main house c/u to test if that holds better ? whether dampness or the computers etc.. also Zs readings were fine and weird one which I haven't seen before is what looks like normal ring connected 2x 2.5mm's in sockets but at c/u a single 4mm twin and earth at 20A mcb ?? like it leaves now on a 20A radial arrangement and is somewhere jointed onto a ring as it links sockets ? Surely not on ? even though is only on a 20A as a radial so covers the 2.5's ! Only other option is to rewire the room with new cable and hope the damp gets sorted sometime, but only way she'll entertain that is via mini trunking surface on hall ceiling from c/u and then along high on walls of room and dropping to each socket all surface mounted.
