A question of insulation.....

[Octopus]

Ok chaps, one of my jobs today was an EICR and when I took the cover off the CU I found this.....





So would you code it or simply comment?

Thanks and every day is a learning day!

 

[7029 dave]

Bloody cavity boys been at it, no code IMO, that 15 amp mcb is spare?, looks like the final is buried in that goo.?

 

[Leesparkykent]

That doesn't look like cavity wall insulation imo. looks like expanding foam.

 

[telectrix]

just what i was going to say. some numpty sealing cable entry to prevent the spread of fire from a non-metal CU.

 

[7029 dave]

Yes your right it is. Still no code IMO

 

[Adam W]

I think it was one of my college tutors who said there's an ingredient in expanding foam which will degrade PVC insulation over time. It's the same with the polystyrene packaging you get electronic products in; that's why the cables always come in plastic bags - not just to give you something else to unwrap.

 

[HandySparks]

Some of the early cavity wall insulation was foam (Urea Formaldehyde?), although the stuff I've seen was whiter in colour.

Whatever type it is, it'll reduce the current carrying capacity of the cables, being a thermal insulator.

 

[PEG]

I would have to have a peep on the other side...just in case they "found" the CU,during other work,and decided to play foamy hide and seek:crazy:

 

[davesparks]

Scrape some off of the cables and see if there are any signs of the PVC having been affected by the foam.
Also try to see how far the foam extends back if you can at all. There is the question of the added thermal insulation of the foam affecting cable ratings.


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[gazdkw82]

Could you not do a continuity test or IR test? Wouldn't that share some light on cable conditions

 

[Octopus]

Could you not do a continuity test or IR test? Wouldn't that share some light on cable conditions

Done, except end to end on the socket circuits,.