thermistors and copper wire

[stu]

I have just made up 4 temp gauges with 100k thermistors as per this site
http://www.benchtest.com/gp_Temp4.html
I plan to use them to log temps around the house for a bit of fun and to see
how much difference insulation makes. they seem to be quite good enough for
what I need, but one thing that I thought of was the wire itself. I have
used 16*25mm insulated for 240V. What I was wondering is, if I run the leads
through the roof and then down inside a wall cavity and we say that roof is
at 50C and the wall cavity at 20C is the wire itself going to conduct enough
heat to raise the temp of the thermistor in the wall cavity? I think I am
worrying about nothing but was hopping someone here could give me some ball
park numbers like degrees C per meter.
Also any links to site about home insulation would be handy.
thanks
stuart

 

[DARIK SMALLWOOD]

You shouldn't have any problems. A temperature differential in the wire
will cause a negligible change in the thermistor. I routinely run the wires
through attics, down walls, near hot water and chilled water lines without
any problems.