The 'borrowed neutral' problem sometimes seen where upstairs and downstairs lights meet at the stairs in a dual gang switch, and current for one light flows back down the neutral of the wrong circuit.
Easy enouhg to avoid, but a sod to fix if the mistake is plastered in already - so the quick fix is to put the upstairs landing light on the downstairs wiring so it is not the wrong circuit anymore
About 20 years ago I replaced an old consumer unit with a new split load type. All went well and tested o.k., except that that evening when the central heating programmer called for heat, one of the R.C.D.s tripped out due to a borrowed neutral.
It was a Devil's own job to explain to the householders why this happened, even though I explained that the new equipment was more sensitive. They were not sympathetic.
I did rectify the problem though to my cost. "The customer is always right".
Z.
The 'borrowed neutral' problem sometimes seen where upstairs and downstairs lights meet at the stairs in a dual gang switch, and current for one light flows back down the neutral of the wrong circuit.
Easy enouhg to avoid, but a sod to fix if the mistake is plastered in already - so the quick fix is to put the upstairs landing light on the downstairs wiring so it is not the wrong circuit anymore
About 20 years ago I replaced an old consumer unit with a new split load type. All went well and tested o.k., except that that evening when the central heating programmer called for heat, one of the R.C.D.s tripped out due to a borrowed neutral.
It was a Devil's own job to explain to the householders why this happened, even though I explained that the new equipment was more sensitive. They were not sympathetic.
I did rectify the problem though to my cost. "The customer is always right".
Z.
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