What is 8 wire thermostat wire for?
Uses for this wire includes controlling relays , powering transformers as well sending 24 volts from thermostats to turn on/off your air conditioning unit or furnace. It is also used for home automation and home alarm systems.
What is 7 wire thermostat wire used for?
If you have a heat pump system or a system that controls either the ventilation or humidity of your home, then you can have a seven-wire thermostat.
What size wire is needed for thermostat?
18 gauge
The most common thermostat cabling is 18/5 (18 gauge, 5 conductor), because 5 conductors typically offer enough functions for a modern thermostat/low voltage device.
How do you run thermostat wire?
Quote from the video:
Quote from Youtube video: Method number two is by using picture hanging chain and we're gonna drop this down the hole. And at the end of the chain.
What are the different thermostat wires?
FIVE WIRES
The wires are typically arranged as follows: red for 24-volt hot, white for heat, yellow for cooling, green for the fan, and blue for common (although the common wire may be a different color).
What is the blue wire in a thermostat?
the Common wire
Blue wires are also called C wires because they are the Common wire. C wires are necessary for any smart thermostat that needs to be connected to a power source 24/7, regardless of your heat pump type.
What happens if you wire a thermostat wrong?
Potential consequences of improper installation could include: Electric shock. Blowing a circuit breaker. Damaging the thermostat unit, the electrical system or even the AC/furnace unit itself.
What is the difference between RH and RC thermostat wires?
There is no standard for the colour of the RH wire, but most units use a red one. The RC wire, on the other hand, refers to “red cooling”. It’s the same with the RH wire in that it powers the thermostat. For the RC, it powers the cooling system.
Why does my thermostat have extra wires?
An extra unused wire in the wall can be used as the C wire for your new thermostat. The extra wire will also need to be connected to the C (common) terminal at the heating and cooling system. This will provide power to your new thermostat.
Where do thermostat wires go?
Thermostat Wiring Tips
The W wire is connected to your heating system. If your thermostat controls your heat, you will have a white wire. The Y wire is yellow and connects to your air conditioning compressor. The G wire is green and connects to the fan.
How do you wire a thermostat for AC?
Quote from the video:
Quote from Youtube video: This right here is a piece of thermostat wire I just cut a piece off. And you strip both ends off and you get yourself a little jumper.
Why is there a jumper between R and RC?
In most cases, the heating and cooling system share a single transformer by leaving the jumper in the lower right corner it connects the RC and RH to power heat and cool features.
Which wire is used for air conditioner?
As we can see, most air conditioner requires anywhere from 18 AWG to 10 AWG wires. Bigger 5+ ton AC units require even thicker wires; 8 AWG or even 6 AWG.
Can I use the G wire for the C wire?
If there is no hidden C-wire, you can use a G-wire instead. However, you will not be able to use your fan independently when the heating or cooling isn’t running. Also, many HVAC systems are incompatible with this solution, including: HVAC systems using electric heat.
Is the C wire hot or ground?
Typically, the wires that provide the power (often called the “hot” wires) are labeled Rc (cooling) and Rh (heating).
Can I jump R to C on thermostat?
You’ll wire the R wire from the heating system, to R or Rh , and the R wire from the cooling system, to Rc . Then you’ll have to wire the C wire from the cooling system, to the C terminal of the thermostat.
Does a thermostat need G wire?
As you mentioned, you don’t usually need a G wire for heating mode, but you do for cooling. In special circumstances a relay could be wired up inside of the air handler to make the fan come on with a call for cooling, but normally it’s the thermostat that makes the connection that makes the fan come in in cooling mode.
Is RC wire same as C wire?
No the Rc is the red wire. You need 5 wires or more for this to run with all the functions. You can use one of the other wires but you have to drop control of the fan. It will only come on when furnace comes on.
What does G mean on thermostat?
fan relay
G: The G terminal controls the fan relay and is responsible for turning the blower fan on and off automatically or manually via the thermostat.
