What on earth is this?!? And where did it come from?? | on ElectriciansForums

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So I completed a CU change on Friday, (It was a bitch btw) and once I was done, when I turned the power back on, switched the pendant on above my head in the hallway and heard a crackling sound coming from the pendant.
I switched the power back off and took the lamp out, to see that it was smoking because there was a strange grease like substance that had been dripping down the flex of the pendant and into the lamp holder, shorting across the pins of the lamp.
I unscrewed the pendant and found what is in the picture I have attached.
Confused, I took up the floorboards above the fitting upstairs, expecting to find some sort of decomposing animal, but found absolutely nothing, totally dry, nothing out of the ordinary.
The property has been rewired as recently as the ‘new colours’ and after stripping the cables back in the fitting a little way, found them to be fine and no sign of any grease or moisture.
Along with having no idea where the hell this grease like stuff could have come from, even if it was sitting in the pendant screw cap like it is, how did it manage to find its way down the flex to such excess, that it’s flooded the lamp holder enough to short the lamp out ?
It’s not like the fitting has been in an incredibly greasy kitchen for years, it’s in the damn hallway!
Look forward to any theories ?
[ElectriciansForums.net] What on earth is this?!? And where did it come from??
 
how did it manage to find its way down the flex to such excess, that it’s flooded the lamp holder enough to short the lamp out

very interesting (if you're a maintenance guy like me)

after some of the "horror stories" i've seen (if it's a busy household, or business) i never assume anything..

(was just restoring a fridge and its seals, found a dead wasp in the main chill compartment, since i work fast and had the fridge door open less than a minute at a time, I'm thinking this wasp must have ninja-stealth skills) ?

anyway, I wonder if moisture has reacted (in this case) with some kind of material left in the plastic lamp fitting? coz you're (logically) assuming its water running in from somewhere, but there's no evidence of this... if the inner area (of the flooring) is completely dry above fitting, then (logically) only a temporary leak (or condensation) occurred.

if you're sure the area above fitting is completely free of a leak, i would count my blessings and put it down to condensation causing a reaction in the "bowl-like" fitting... condensation can form in surprising ways, even in what appear to be "dry places" (say if there's a kitchen or bathroom nearby).

just an old-timers assessment.

regards nb.
 
It’s absolutely bizarre! Would love to know how it got there, it was a really greasy substance, and as you can see if you look closely in the picture, there is some really strange crystallisation in the substance.
But what also beats me, is that even if it was just sat in the pendant cup, it’s clearly not deep enough to be over flowing down the hole the flex is in to seep into the lamp holder and short out the lamp ?
 
I’m putting my money on full fat coke, or gravy??

ah…. Checking the photo, it’s in a kitchen.
Has there been a cooking incident that’s caused a blast of ingredients hit the ceiling?
been decorated since, but no one emptied the pendant??
 
it’s clearly not deep enough to be over flowing down the hole the flex is in to seep into the lamp holder and short out the lamp

thats why I'm going for condensation causing a reaction with something left in the "bowl" ?

if there's enough condensation to form actual droplets, then a short can occur.

... it looks like very old chip fat grease to me.. i dont want to say whoever worked on this last did this "on purpose", but if there's no kitchen above the fitting, the only logical answer is someone working on the socket left the substance in the bowl... (it all depends on the history of work at the premises)... I've seen jobs where you're thinking... hmm... maybe they didnt get on?

(i dont think pros would do this kind of thing.. but it can get tense if you have a very unhelpful owner who may be an expert in cat-grooming, but hasn't been near screw-drivers in 20 years)... ?

i suppose, if you were keen enough, you could have substance analyzed... but yeh, if there's no leak, i'd ask owner about condensation issues they may be having.

regards, nb.
 
I’m putting my money on full fat coke, or gravy??

ah…. Checking the photo, it’s in a kitchen.
Has there been a cooking incident that’s caused a blast of ingredients hit the ceiling?
been decorated since, but no one emptied the pendant??
Took the photo in the kitchen, misleading sorry, I did mention in the original post it was in the hall way.
 

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