I see no problem with that at all. Both are independent of each other. If they touch, it sounds as if you need to provide some sort of non conductive material between the duct and box,, or use a plastic box.

Can I run Romex next to ductwork?

As long as there are no sharp edges in the chase that might physically damage the cable, there’s no code violation if Romex touches metal hvac supply or return ducts.

Can you run a wire through an air duct?





Air ducts are meant as a conduit for air, not wires. Inserting cables inside the ductwork may even violate building codes. The reason we don’t advise this is because a technician can damage the cables during an air duct cleaning.

How many wires can you have in a junction box?

Choose the Right Junction Box



For example, the smallest 2-by-4-by-1-1/2-inch-deep box can comfortably splice only two cables (four or five conducting wires), while the largest 4-by-4-by-2-1/8-inch-deep boxes can handle as many as four to six cables (up to 18 individual conducting wires).

Can you run thermostat wire in duct?

running any kind of wire inside ductwork is a big no-no by any standard !

Can you put an electrical box in a cold air return?

So yes, it’s definitely OK to install anything that is allowed in NEC 300.22(C). That means that any sort of exposed Romex or NM cable is a NO-NO unless it goes across (perpendicular) to the airflow only (300.22(C) Exception). Similarly, nonmetallic boxes are a NO-NO.

Can you run electrical wire through insulation?





Yes, you can. RetroFoam insulation is both soft and pliable. Its composition makes it very easy to fish electrical wiring through the injection foam insulation.

Can you run thermostat wire next to electrical wire?

It can enter the same ENCLOSURE as power wiring only when the two wiring systems are connected to the same piece of equipment. However in such a case the class 2 wiring must be seperated by a barrier or kept 1/8″ apart within the box. 725.55(D).

How far can you run thermostat wire?

Maximum wire length is 300′ . Do not route wires along 120 VAC lines . 1 . Remove the back of the thermostat, by pressing the tab on the bottom of the unit .

How do you run a new C wire?

Youtube quote:Run actual thermostat wire in the all and connect. It to the existing thermostat wire if you've got an extra wire or if you want to fish some new ones in the wall.

Does C wire have voltage?



A C-wire, or a common wire, runs from your low voltage heating system (24v) and carries continuous power to your thermostat. In today’s electric market, most newer heating and cooling systems have C-wires, which guarantees compatibility for the installation of all smart thermostats.

Can I use RC wire 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.

Is the C wire a ground?

C stands for common. The common wire is the ground or negative wire. To complete the circuit that provides power to the thermostat you need a positive and negative wire from the 24V transformer.

Where do you connect the C wire?



Youtube quote:To this C. For the common wire or. The ground path for the 24 volts to return to and so that is actually where we're going to go ahead and hook our C wire into underneath this wire nut.

Can I use ground as common wire?

a ground and a neutral are both wires. unless they’re tied together with other circuits, and not a ‘home run’ back to the panel, there is no difference between the two where they both end up on the same bus bar in the box.

What can I use if I don’t have AC wire?

Youtube quote:Terminal. If there's already a wire attached to the C terminal. Just leave it be and attach a new wire next to it go ahead and push all the wires back into the wall.

Can you install nest without C wire?

You can install a Nest Thermostat without a C-wire by using a C-wire adapter, that mimics a traditional C-Wire without you having to wire it. If you are not a handyman, it saves a lot of money that you would otherwise have to spend on a professional installer too.

What color is C wire?



Blue wires

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.