How to deal with Pyro Cable?

[Mattja]

Situation is there's some 53 year old pyro cable that I need to either remove, or make dead, or cut short and push back into the wall having ensured that the still-live end cannot short out the circuit or come into contact with anything.

No hope of fully removing it, as it goes up the cavity and I don't even know the route it takes.
Chances of finding the junction box that connects it to the downstairs power ring are remote, I suspect it connects at a junction box fixed into the wall behind fixed cupboards, next to pipes, in a kitchen, and below the bath (bathroom above the kitchen), however I cannot be sure. I also am not sure I can take the cupboards down without damaging them (I'm no carpenter/kitchen fitter).

SKIP TO THE POINT:

The obvious thing to do seems to be to cut the cable just after it leaves the outside house, fix the end in such a way that it's not going to short the circuit or make live anything it comes into contact with, and shove it back into the wall (then cement over it). I've not had to deal with pyro before, how would you recommend going about this?

 

[Pete999]

Might interest you Pete. An article from Electrical Engineer magazine from 1938 about a relatively new type of cable "Pyrotenax" and its performance after a fire. View attachment 33577

Thanks Andy

 

[Pete999]

Anyone remember the Pyro Book "Electrician's Mate" a sort of who's who and what's what about Pyro, think it was published Calender Cables BICC

 

[netblindpaul]

Anyone remember the Pyro Book "Electrician's Mate" a sort of who's who and what's what about Pyro, think it was published Calender Cables BICC

Nope, but, I've just bought one!

 

[Lucien Nunes]

Anyone remember the Pyro Book "Electrician's Mate"

Technically it was before my time but I got a copy when I was about 14 and my mentor was teaching me to work MI, and now I've got all three editions. Handy when you are reworking imperial sizes, e.g. to translate gland numbers in thou into cable types and vice versa.

 

[Pete999]

Situation is there's some 53 year old pyro cable that I need to either remove, or make dead, or cut short and push back into the wall having ensured that the still-live end cannot short out the circuit or come into contact with anything.

No hope of fully removing it, as it goes up the cavity and I don't even know the route it takes.
Chances of finding the junction box that connects it to the downstairs power ring are remote, I suspect it connects at a junction box fixed into the wall behind fixed cupboards, next to pipes, in a kitchen, and below the bath (bathroom above the kitchen), however I cannot be sure. I also am not sure I can take the cupboards down without damaging them (I'm no carpenter/kitchen fitter).

SKIP TO THE POINT:

The obvious thing to do seems to be to cut the cable just after it leaves the outside house, fix the end in such a way that it's not going to short the circuit or make live anything it comes into contact with, and shove it back into the wall (then cement over it). I've not had to deal with pyro before, how would you recommend going about this?

Here is a quick solution to your problem, it's not Pyro, but hey ho

 

[Lucien Nunes]

Amazing! I didn't realise you were supposed to use wirenuts, I normally push the end of each cable into a marshmallow (pink for line, white for neutral). If you don't have wirenuts and PVC tape, perhaps you can use biro caps and a rubber band.