RCD Keeps tripping

[James9292]

I have recently added two double sockets in a lounge original nor realising that the source was a spur that someone had already wrongly spure, so two existing double sockets a spur from a spur I then added 2 sockets across the room on a back to back wall essentially creating 4 spurs which obviously tripped the RCB.After realising the mistake I added a 13A fuse before the first socket to prevent tripping and make the original sockets safer also so the order now goes spured power into 13A fused split to feet 2 sockets that in turn feed 1 double socket each. Unfortunately the problem has persisted I have tested all sockets with a fault plug and all register correctly wiring and no faults. I don't know if this is earth leakage from an appliance or RCB failure the main CU only has 2 RCBs one for lights and one for the entire ring Main B32 30mamp load and another B6 for the lights and 1 MCB each which seems minimal

 

[Intoelectrics]

Does an RCBO not give earth fault and over current protection as well ?

To be fair to Littlesparks, I don't think it was made very clear in the original post whether it was an RCBO or RCD with MCB's. I'm guilty of assuming it was a split 2 x RCD with MCB's CU.

 

[James9292]

To be fair to Littlesparks, I don't think it was made very clear in the original post whether it was an RCBO or RCD with MCB's. I'm guilty of assuming it was a split 2 x RCD with MCB's CU.

Very true, sorry but yes the tread has moved on originally a RCD tripping at intervals of 6hrs then 4 then every hour and then it refused to come on with the ring main mcb up due to a fault on the ring main now identified as the old part of the house with 1970s wiring and it's crumbling and melted together at the sockets on inspection resistance of between 50 and 90ohms

 

[James9292]

Very true, sorry but yes the tread has moved on originally a RCD tripping at intervals of 6hrs then 4 then every hour and then it refused to come on with the ring main mcb up due to a fault on the ring main now identified as the old part of the house with 1970s wiring and it's crumbling and melted together at the sockets on inspection resistance of between 50 and 90ohms

But no fault found at outlets concluded old had core wiring degradation

 

[Intoelectrics]

Very true, sorry but yes the tread has moved on originally a RCD tripping at intervals of 6hrs then 4 then every hour and then it refused to come on with the ring main mcb up due to a fault on the ring main now identified as the old part of the house with 1970s wiring and it's crumbling and melted together at the sockets on inspection resistance of between 50 and 90ohms

No worries, just for future reference, it makes it much clearer for readers to get an understanding of the situation if you can be accurate, clear and definitive in your description of the installation set up (type of earthing, CU type, type and rating of protection devices, type of wiring etc...).

 

[James9292]

No worries, just for future reference, it makes it much clearer for readers to get an understanding of the situation if you can be accurate, clear and definitive in your description of the installation set up (type of earthing, CU type, type and rating of protection devices, type of wiring etc...).

For future reference if your not a qualified expert your not going to know all that from the start if I was fully qualified I wouldn't have had to ask the questions or as you put it describe it all inaccuratly and as I stated the initial post has moved on

 

[Intoelectrics]

For future reference if your not a qualified expert your not going to know all that from the start if I was fully qualified I wouldn't have had to ask the questions or as you put it describe it all inaccuratly and as I stated the initial post has moved on

My post wasn't meant as a criticism, more as advice when seeking help. I appreciate you are still learning, I encourage my trainees to learn about all the protection devices. If they understand how they work and why they work i.e. what makes them operate this helps when diagnosing faults.

I have fell foul to not describing scenarios accurately before, and it has on occasion, made me feel embarrassed. My intention was to offer friendly advice, apologies.