What is meant by a neutral fault can be thought of in this way
The trip switch at your mains is sensitive to the balance of current flow down the live and back via the neutral, if its not balanced some is leaking to earth
A neutral -earth leakage via the fixed wiring or a appliance is high enough that it causes operation of the trip
Usually its an appliance that causes the tripping,in the case of delayed rather than instant tripping the main culprits are usually freezers and fridges
If you run a extension lead from the neighbours and try finding the problem by process of elimination
Paying someone to find a fault and being left with same problem is very annoying,unfortunately people get called electricians when they have no right to such a title
If you do bring in another,be aware he needs to make use of test meters or you are being ripped off once again,its not the sort of problem that can avoid their use
The trip switch at your mains is sensitive to the balance of current flow down the live and back via the neutral, if its not balanced some is leaking to earth
A neutral -earth leakage via the fixed wiring or a appliance is high enough that it causes operation of the trip
Usually its an appliance that causes the tripping,in the case of delayed rather than instant tripping the main culprits are usually freezers and fridges
If you run a extension lead from the neighbours and try finding the problem by process of elimination
Paying someone to find a fault and being left with same problem is very annoying,unfortunately people get called electricians when they have no right to such a title
If you do bring in another,be aware he needs to make use of test meters or you are being ripped off once again,its not the sort of problem that can avoid their use