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Old 08-18-2018, 09:17 PM   #1
JWolfe75
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Join Date: Apr 2017
Location: LV, NJ
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Ditra Heat wiring

I can't find a definitive answer on this...can I shorten the cold lead and the temperature sensor wires?

I could probably get away with jamming the cold lead wires in the box, but both temp sensor wires are at least 2 feet out of the wall. Maybe I'm just missing it, i've reread the directions and searched...feel like i'm getting a little cross eyed.

Thanks
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Old 08-18-2018, 09:43 PM   #2
wwhitney
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I don't believe the instructions actually say, but logic says you can safely shorten those wires, and I believe I did so with my successful installation a couple years ago.

In each case a high resistance element (the heating wire or the thermistor) is in series with a low resistance element (the cold leads or the thermistor wiring). So shortening the low resistance wiring is not going to significantly change the overall resistance in either case.

Cheers, Wayne
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Last edited by wwhitney; 08-19-2018 at 01:04 PM.
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Old 08-19-2018, 04:27 AM   #3
Gozo
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Yes, you can shorten the wires. I don’t have the Schluter directions handy, but It does say somewhere in there that you can shorten the cold lead. It’s standard #14 stranded copper wire and contributes nothing to the heating (well, essentially nothing). For the sensor lead the directions are silent. They’re also stranded standard copper wire but a much thinner gauge (probably around #20). The resistance of the wire is an insignificant % of the 10K thermistor so any total error because of shortening would be in the order of fractions of a percent. Just be careful not to nick the wire when cutting. I also lightly tinned to ends before putting into the thermostat.
Exactly this question was discussed here: https://www.johnbridge.com/vbulletin...56#post1473056
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Old 08-19-2018, 09:59 AM   #4
JWolfe75
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Thanks for the info, will get to snipping.
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