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TJ_in_IL 10-16-2009 12:33 PM

Thermostat Wire Question
 
Greetings,
I would like to rewire my thermostat, and relocate my Humidstat to the house, instead of the basement. This would require 6 conductors.
My question is, can I use 18/6 Stranded as opposed to Solid? I have several rolls of stranded from my alarm days, and cannot see buying new wire if not needed. The total run is only about 30ft. Currently there is 20/4 running to the thermostat. Both the thermostat and furnace contol board have compression type screw terminals, not the kind you wrap the wire around.

Thanks in advance for your thoughts.

Yoyizit 10-16-2009 12:39 PM

IMHO
yes on the stranded, yes on the gauge, yes on the distance.
For the connectors you may want to tin the wire ends but be careful the solder doesn't wick up into the insulation.

TJ_in_IL 10-16-2009 12:48 PM

Quote:

Originally Posted by Yoyizit (Post 341503)
be careful the solder doesn't wick up into the insulation.

Thanks for the quick reply. I was going to tin anyway, but wondering why the caution about wicking? I have never heard of that warning before.

TJ

Yoyizit 10-16-2009 12:53 PM

Quote:

Originally Posted by TJ_in_IL (Post 341507)
Thanks for the quick reply. I was going to tin anyway, but wondering why the caution about wicking? I have never heard of that warning before.

TJ

If the wire is flexed, where the wicking stops there will be a sharp bend radius leading to breakage at that point.
All stranded or all solid wire gives a uniform large or small bend radius when flexed.
In this application it may not matter.

TJ_in_IL 10-16-2009 12:55 PM

Fair enough. Thanks again.

yuri 10-16-2009 05:57 PM

Use #18 stakon crimp connectors with eyelet ends on the board for a neat job. Not sure about the tstat.


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