On Aug 21, 3:12*pm, Stephen wrote:
On Thu, 20 Aug 2009 13:45:01 -0700 (PDT), NT
wrote:

Well... I sense confusion. Yes there's 90C pvc versus 70, the term
'heat resistant' only means its to some degree more heat resistant
than the more common pvc, that doesnt make it comparable to high temp
cables such as butyl rubber.

Then there's also the q of what happens when temp rating is exceeded,
rubber and pvc behave somewhat differently.

I'm happy to admit I may be confused because I am certainly not an
expert but shouldn't TLC know better? Why are they advertising it as
immersion cable if it would be dangerous to do so?

What makes you think their immersion heater cable may be dangerous?


What happens to butyl and PVC cables when they overheat?

Short term pvc goes very soft, conductors migrate through it, and
fires tend to happen. Long term is hardens and falls apart
Rubber suffers no ill effect short term, long term it hardens and
breaks.


NT