T&E and insulation foam

[ColinJacobson]

I believe T&E cable cannot be in contact with some insulation foam material as it deteriorates the cable. Anyone know which type of foam?

thanks.

 

[holmslaw]

..

 

[Chri5]

polystrene v cable sheaf = melting sheaf

 

[skenk]

It's not foam that degrades t&e, it's polystyrene insulation. But the current carrying capacity of a cable is affected by any kind of thermal insulation.

 

[ColinJacobson]

Thanks for the last two informative replies. So, from this I deduct all other foams are OK if in contact with T&E cable?

 

[skenk]

afaik all FOAM is ok in contact with t&e POLYSTYRENE is bad and thermal insulation de-rates the cable

 

[ricicle]

Polystyrene can cause the plasticiser in Pvc cables to leech out thus leaving the cable brittle and less flexible so insulation breakdown will occur.

 

[Taylortwocities]

crazy and shaving.

Thanks, you have made a happy man very old...

 

[jaysean1]

'Polystyrene can cause the plasticiser in Pvc cables to leech out thus leaving the cable brittle and less flexible so insulation breakdown will occur'

learned that in my 17th ed course few weeks ago