[Question] Earth Leakage Trips On All Circuits

[Elec-JP]

I came across an earth leakage which trips on whichever circuit I switched on.

With only the Main breaker and the earth leakage switched on, the earth leakage stays on and operates normally when the test button is pressed. However when I switch on any of the other circuits ( plugs, lights, ect.), the unit trips. I replaced the Earth leakage and the same problem persists.

Any idea what the problem might be?

[Dylboy]

Hello

Is this a new DB or an existing one that now has this tripping issue ?

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[Derlyn]

I came across an earth leakage which trips on whichever circuit I switched on.

With only the Main breaker and the earth leakage switched on, the earth leakage stays on and operates normally when the test button is pressed. However when I switch on any of the other circuits ( plugs, lights, ect.), the unit trips. I replaced the Earth leakage and the same problem persists.

Any idea what the problem might be?

Neutral - earth fault.

Turn off the main breaker.
Measure resistance between neutral and earth. Chances are 80% that they are touching somewhere.

Peace out .. Derek Stuart.

[Leecatt]

Neutral - earth fault.

Turn off the main breaker.
Measure resistance between neutral and earth. Chances are 80% that they are touching somewhere.

Peace out .. Derek Stuart.

I agree, many times I found that the fault was inside of a light fitting where the collection of neutral wires had burned at the connection point and was touching onto Earth.

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[Justloadit]

What I have done in the past, is to switch all the circuit breakers off.
Then with a multimeter set on Ohms, I check each switched off "Live" (Load) side of the circuit breaker to earth.
Once I find the circuit which has a resistance reading.
I then proceed to maintain the meter connected to the offending circuit, then remove one Neutral wire at a time from the bus bar.
Once I find the Neutral that is causing the issue, I then proceed to identify where the circuit is, or if that is a mixed circuit, I will identify it by switching all the other breakers on, and check around the site to see what is not working.
Then proceed from there.

On most occasions, I have found humidity or water in a junction box on a wall where there has been a badly made connection, or that has been badly insulated from the elements