Glowing cables | on ElectriciansForums

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B

BlueToBits

I usually do commercial work these days, but I attended a domestic call out today. I don't do this very often but I happened to be passing on the way to another job. The customer was complaining of funny smell since last night coming from her consumer unit.
I entered the house to a haze of smoke and a stench of burning plastic.
So, after removing the cover of circa 1990 squareD board, I noticed a bright yellow glow coming from the under the MCB cable entry (these boards have a top busbar). Everything was far too hot to touch. A 2.5mm cable had burned almost right through, and was glowing like a filament and had clearly been cooking the consumer's unit for quite some time. I should have taken a photo but was too alamed to think about it at the time.
I've seen the aftermath of an electrical house fire several times, but this is the first time I have seen the beginnings of what would have almost certainly have become one.

Just thought I would share this.
 
It was 3.30pm and she had to collect her childern from school so I didn't get much time to investigate in detail. The circuit was a 32A ring with the offending cable spurred from the MCB and feeding another 32A MCB in a seperate enclosure. I suspect that this is a kitchen ring installed by someone who couldn't source a SquareD breaker so thought it would be OK to take a spur off.
I just isolated the circuit and am returning tomorrow morning with a new consumer unit.
 

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