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Hi, odd one this, I live in an old house and the wiring is confusing to say the least. I keep well away as rent and not my place to fiddle with it. Has anyone experienced the following?

The house has several circuits as is split into a house and a small flat downstairs.

Yesterday, some of the house tripped - the cooker, immersion heater, and downstairs lights.

If a high drain item is switched on such as the cooker, a fan heater or immersion, the circuit trips. However, if you plug e.g. a fan heater into one of the power sockets, the other circuit trips but the circuit powering the heater (i e the sockets) is still ok and don't trip.

if you reset the trip and leave the lights on, it trips again but after a few minutes.

I'm perplexed as have never known a trip to go on another circuit like leaving the one tripping it still, able to run.

Any advice greatly appreciated of course.

Seems like a load issue but I really don't know.

Richard
 
looks like a N-E fault. this can cause a trip on a RCD not connected to the circuit where the load causes the trip.. deffo a job for a competent sparks to trace and rectify.
 
So it does. The default symptoms of an N-E fault are that:

The faulty circuit is on the RCD that trips.
The trip may be caused by putting load on some or all circuits, including circuits not controlled by the RCD that trips.
The higher the load, the more likely the trip.

The fault can be anywhere in either the wiring or the appliances connected to it, so try switching off the cooker and immersion isolator switches and see if the tripping stops. It must be the isolators, not the MCBs, as the former are double-pole and will isolate the neutral fault if in the appliance.
 
Many thanks for the suggestions, an electrician is coming on Tuesday. Definitely sounds like a neutral /earth fault though nothing has been changed in the house.

Regards
Richard
 

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