Date   : Thu, 03 Sep 2009 11:07:41 -0700 (PDT)
From   : flynnjs@... (Jason Flynn G7OCD)
Subject: Leccy @ Acorn World '09

--- On Thu, 3/9/09, Mick Champion <rs423@...> wrote:
> However, what do you mean by "material it is enclosed in"?
> Do you mean aperture the cable rests in, or the cable 
> covering (ie PVC)? If you refer to the aperture,?please
> tell? more.

Yes, the sustained current rating depends on factors such as
whether it is in conduit surrounded by still air, attached to
a wooden beam using cable holders, buried in plaster..etc..
It's a thermal thing and it's important when fitting 11kW
electric showers etc :-)