Weird Earth Fault

[derek]

What are your insulation resistance values on the circuit with all loads disconnected?

 

[ThrownRazor25]

With rcbo off but main switch on 8 - 10 ohm between l and e on continuity tester. Ir test is greater than 299 on every circuit
[automerge]1570137908[/automerge]
With main switch off, the 8-10 ohm disappears but the tester just clicks on off on off on off for continuity

 

[westward10]

Turn the main switch off you are getting continuity because neutral and earth are connected external to the installation.

 

[Strima]

With rcbo off but main switch on 8 - 10 ohm between l and e on continuity tester. Ir test is greater than 299 on every circuit
[automerge]1570137908[/automerge]
With main switch off, the 8-10 ohm disappears but the tester just clicks on off on off on off for continuity

Sounds like your picking up the circuitry within the RCBO. What continuity do you get with the RCBO disconnected?

 

[ThrownRazor25]

It disappears when disconeccted from rcbo so changed rcbo but new rcbo has same ptoblem

 

[westward10]

What disappears. Randomly changing components is only guesswork you need to find the actual problem causing the issue.

 

[ThrownRazor25]

I never randomly changed anything. As i said the 8 ohm disappears when the live and neutral disconnected from rcbo so i suspected a faulty rcbo. I changed it to see if a new one had tbe same result. It did.

 

[westward10]

If you have 8ohm between line and earth you would have 20 + odd amps flowing.

 

[ThrownRazor25]

How can i touch it randomly then?

 

[PEG]

How can i touch it randomly then?

.....it's easily done....i have the restraining order,to prove it...