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Can I Extend Thermostat Wires?

FAQs Jackson Bowman October 17, 2022

If you must, you can splice the thermostat cable and generally the thermostat will not function properly if the splicing is done correctly. And because thermostats typically only require low-voltage power, there are no safety regulations prohibiting the use of spliced ​​thermostat wires.

How do you splice wires on a thermostat?

Can I jump thermostat wires?

What happens if you short thermostat wires?

If you short the R wire to the C wire, you have effectively created a very low impedance closed circuit across the secondary of the 24V transformer in the HVAC system. This causes high current in the circuit, which can quickly overheat the wires.

Does a thermostat need a junction box?

It’s not required, but it may be a good idea. I would personally prefer them to be in conduit (e.g. ENT/smurf hose) with splices in junction boxes. Just like with electrical cables, it protects them from damage while providing accessibility for splices.

How do you rerun a thermostat wire?

How do you splice wires?

Using electrician’s pliers, twist the stripped ends of the appropriate wires from each 12/2 strand of Romex, white wire to white wire and black wire to black wire. Twist until tight and secure each connection with a threaded wire cap/nut. Fold both sets of cables neatly into the junction box.

How do you trick a thermostat to make it warmer?

And how do you do that? The trick is to use something to heat the area around the thermostat. For example, placing a microwaveable heating pad next to the thermostat for a few minutes should be enough to raise the air temperature enough to kick the air conditioner on.

How do I turn my heat on without a thermostat?

Can I jump R to C wire?

C is a common neutral. You cannot jump it off Rh as this is a 24v wire. You need a third wire, C, to return to the device and connect to the common side of the transformer. For simplicity, think of R as “hot” and C as “bulk”.

What happens if you touch the thermostat wires together?

The thermostat completes the circuit between the wires when it calls for heat as the 24 volts fed to it come from a special thermostat relay. You didn’t hurt anything when you touched the wires.

What color is the C wire on a thermostat?

Blue wires are also called “C” wires because they are the common wire. C-cables are required for any ‘smart’ thermostat that needs to be connected to a power source 24/7, regardless of your heat pump type.

How many wires does a thermostat need?

The simplest thermostat has 2 wires; usually a red and a white wire. Two-wire thermostat wiring is used only for furnaces and does not typically require a “C” or “Common” wire. That’s why we only need two wires.

Can you connect 2 thermostat wires together?

And since thermostats typically only require low voltage power, there are no safety regulations prohibiting the use of spliced ​​thermostat wires. While it’s always better to have wires that are unspliced, a spliced ​​thermostat wire can be just as good if spliced ​​properly.

How do you extend a wire without a junction box?

There are many ways to splice wires together. In some cases you can just use a few wire caps. In other cases you can try soldering them together. You can use a wire cap or nut when working with smaller wires; However, you can opt for a butt splice if you are working with larger wires.

How do you extend a wire with a junction box?

How far can you run thermostat wire?

The maximum cable length is 300′ . Do not run cables along 120 VAC lines. 1 . Remove the back of the thermostat by pressing the tab at the bottom of the unit .

How much does it cost to rewire a thermostat?

How do you fish wire through a wall?

How do you extend a wire that is too short?

References:

  1. https://www.youtube.com/watch?v=kO5Fy07y_kM
  2. https://www.youtube.com/watch?v=8ubhKcZC-dg
  3. https://diy.stackexchange.com/questions/29170/what-could-be-damaged-if-i-shorted-the-r-wire-to-the-c-wire-at-my-thermostat
  4. https://diy.stackexchange.com/questions/117842/do-low-voltage-wires-need-to-go-in-a-junction-box
  5. https://www.youtube.com/watch?v=iangVBjcDHI
  6. https://www.bobvila.com/articles/how-to-splice-wires/
  7. https://www.survivesummer.com/how-to-turn-on-your-office-air-even-if-the-thermostat-is-locked/
  8. https://www.youtube.com/watch?v=jhg5xDSPK1M
  9. http://www.dslreports.com/forum/r27772410-Can-I-use-the-jumper-from-RH-to-C
  10. https://homex.com/ask/what-happens-if-thermostat-wires-touch
  11. https://www.aireserv.ca/about/blog/2020/february/the-thermostat-wire-color-code-you-need-to-know/
  12. https://learnmetrics.com/thermostat-wiring/
  13. https://thermostatguide.com/can-you-splice-thermostat-wires/
  14. https://www.cohesivehomes.com/extend-splice-wire-without-junction-boxes
  15. https://www.youtube.com/watch?v=n-i1JKmpTwI
  16. https://www.auersteel.com/ASSETS/DOCUMENTS/ITEMS/EN/Aprilaire_8476_Instruction_Installation_Sheet.pdf
  17. https://homeguide.com/costs/thermostat-installation-cost
  18. https://www.youtube.com/watch?v=eSMUnuoxdZQ
  19. https://www.youtube.com/watch?v=gmDj6i4pGDQ

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