This question is only valid thru Monday, 1/21.

I would like an circuital drawing for a cable that meets the following
performance characteristics:

An electrical cable that, in cold weather, generates a constant
controlled outside temperature of approx. 45 degrees (with as little
variation as possible).  In warm weather, the temperature can go above
the 45-degree constant, so cooling isn't an issue.

The length of this cable would vary, but the max is 100 ft. 

It would be plugged into a 120 volt AC outlet, and would be
automatically controlled by an integral thermostat. This is
essentially a heating blanket with a thermostat.

A GFI could be used at the beginning of the cable. 

It would also include a power indicator light in the plug for
assurance that the system has power.

Thanks!

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Request for Question Clarification by alienintelligence-ga on 17 Jan 2003 06:36 PST

Hi tupty,

Indoor, Outdoor, both?

-Alien

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Clarification of Question by tupty-ga on 17 Jan 2003 16:20 PST

Thanks out door

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Clarification of Question by tupty-ga on 17 Jan 2003 16:50 PST

alienintelligence - I'm moving this question to Science > Instruments
and Methods....FYI.

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Request for Question Clarification by alienintelligence-ga on 17 Jan 2003 17:10 PST

Hi again tupty...

Would your circuit be equivalent to a
'heat tape' used to protect water pipes
from freezing?

[ http://www.do-it-yourself-pumps.com/frostex-heat-tape.htm ]

thanks,
-Alien

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Clarification of Question by tupty-ga on 17 Jan 2003 18:16 PST

Exactly.

Forget the GFI stuff, and think of it as outdoor heat tape.

Hello, 
This is merely a comment and perhaps not exactly what you are looking
for.
I think the type of cable you have in mind, is usually defined as
"trace heating" (in the uk at any rate)
The link below gives the technical details in design and construction,
along with some simple drawings. The company providing the info are uk
based, and thus normally supply cables rated 220V ac, however they do
supply on special order, 120V ac cables. Drawings for both cables
would be identical.
http://www.heat-trace.ltd.uk/english/products/selfreg.htm

Others:
http://www.fineunichem.co.kr/cable/cable-1.html

http://www.trmltd.co.uk/trm16.html

Search query:
trace heating

Hope this helps

Dear Alien,
 I need the circuital diagram of this with a thermostat. I know of the
product. Thanks