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Is It Better For Your Furnace To Have A Dedicated Circuit?

Is It Better For Your Furnace To Have A Dedicated Circuit?

Your electrician might advise having a separate circuit for that if you intend to upgrade your HVAC system by adding a furnace in time for the cold months. But you can question whether doing so is actually required.

Yes, it is essential. A furnace must be powered by a dedicated circuit, which implies the circuit can only power the furnace. There is a unique circuit breaker in the breaker box for this circuit. A disconnect switch for your furnace also aids in ensuring its security.

However, what is a furnace disconnect switch, and how does it assist with furnace control? Continue reading as we go into further detail. We’ll also go through the many kinds of disconnect switches you may use. Additionally, we’ll discuss the advantages of having a dedicated circuit and identify the appliances that require one.

Why Is A Dedicated Circuit Necessary For A Furnace?

Is It Better For Your Furnace To Have A Dedicated Circuit?

Every item or appliance classified as critical-use is required by the National Electric Code to have access to a separate electrical circuit in order to prevent another device from tripping the breaker and cutting power to that essential equipment.

The main goal of these electrical components is to ensure the effectiveness, performance, and safety of heavy-duty appliances.

How Does A Furnace Disconnect Switch Work? What Is It?

Is It Better For Your Furnace To Have A Dedicated Circuit?

By switching off the power to the furnace, this switch is utilized to turn it on and off as needed. The majority of building rules specify that a switch or other mechanism of disconnecting should be installed close to and in plain sight of the furnace. Usually, it is fastened to a wall or the side of the furnace.

The disconnect switch looks similar to a regular wall switch for lighting fixtures.

To ensure safety while doing maintenance on the furnace, you can cut off the power at the circuit breaker, the disconnect, or both.

In addition to being useful, the disconnect switch provides another safety measure. It ensures that the furnace’s electricity is maintained off even if the circuit breaker is mistakenly turned on.

What Kinds Of Furnace Disconnect Switches Are There?

Furnace disconnect switches come in two different varieties. Which are:

Single-Pole Switch

Similar to a standard wall switch for lighting fixtures, this type. When installing these switches, the voltage and amperage of the furnace circuit are taken into account.

Fused Switch

This switch is special because it combines a toggle switch with a fuse. You can turn off the electricity to the furnace by removing the fuse, turning the switch off, or doing both.

A metal lid with a hinged side that fits into the fuse socket serves as protection for the fuse.

Numerous local legislation and furnace manufacturers mandate fused switches. Some older furnaces, especially those that burn oil, contain these switches.

What Are Lockable Breakers, And Are They Secure?

Some municipal rules may authorize a furnace disconnect to be a locked breaker rather than a switch near to the furnace.

Due to the lack of convenience and potential safety risk, this is not the best solution and is not suggested for new furnace installations. If your vintage furnace doesn’t have a visible disconnect switch, check to see if the circuit breaker has a locking mechanism instead.

If not, it could be a good idea to install a disconnect switch to guarantee safety the next time the furnace needs maintenance or repairs.

What Benefits Come With Having A Dedicated Circuit?

The following are some advantages of having a dedicated circuit:

Create Sufficient Electrical Current

Major appliances demand a substantially higher electrical current than lights and smaller devices. If you hooked your dishwasher or electric range to a regular electrical socket, you would immediately overwhelm your home’s electrical system.

With a dedicated circuit, you can ensure that your device receives sufficient electrical current without running the risk of overloading the other electrical outlets in your house.

Your electrician will set up your dedicated circuit so that it regularly supplies your appliance with the right amount of power.

Get Rid Of Electrical Safety Hazards

By averting potentially hazardous safety issues, installing dedicated circuits throughout your home will also contribute to the safety of your electrical system.

If an item is connected to a regular circuit as opposed to a dedicated one, your home could be at risk of an electrical fire. If you spend money on dedicated circuits, you’ll feel more at peace after installing your new appliances.

Avoiding Penalties

Build separate circuits before installing your next appliance to avoid violating the National Electrical Code and paying huge fines.

The NEC was created to guarantee that all residential and commercial properties are protected from electrical safety threats. You can get help from your electrician to ensure that all of your outlets and appliances meet safety requirements.

What Levels Of Dedicated Circuits Are There?

Dedicated circuit levels consist of two:

  • Circuit of 20 amps
  • Circuit 30 to 50-amps

Circuit Of 20 Amps

A 20-amp dedicated circuit can serve mid-range equipment like home entertainment systems or kitchen outlets.

Modern kitchens may be equipped with many 20-amp dedicated circuits for the continuous operation of toaster ovens, stand mixers, and coffee makers.

Circuit 30 to 50-amps

For large, powerful appliances like water heaters, clothes dryers, and ovens, a 30- to 50-amp dedicated circuit is necessary.

These circuit breakers frequently prevent a circuit from using too much power and perhaps starting a fire by offering double pole protection.

What Is The Price Of Installing A Dedicated Circuit?

The price of installing a dedicated circuit ranges from $570 to $1,000, depending on where you live and how difficult the process is.

Which Additional Appliances Require A Dedicated Circuit?

For devices that draw a lot of power and are known to cause voltage surges or fluctuations when turned on and off, which could affect other electrical equipment that shares an electrical circuit, dedicated circuits are often advised.

High-Power Equipment For Demand

In the house or office, appliances that consume a lot more power than other devices frequently need to be connected to their circuit using a separate circuit breaker.

Power-intensive devices and appliances include:

  • Refrigerators
  • Water Heaters
  • Wall Oven
  • Furnaces
  • Electric Stoves
  • Air Conditioners and Heaters
  • Dryers
  • Washing Equipment

Appliances For Special Use

Every item or appliance identified as critical-use must have access to a separate electrical circuit to prevent another device from tripping the breaker and cutting power to that essential equipment.

As an illustration, if the circuit breaker for your furnace, water heater, sump pump, or refrigerator fails and you are unaware of it, you can find yourself in a house that is freezing, without hot water, with a flooded basement, or with a fridge full of bad food.

Every piece of electrical equipment that is necessary to protect your family, possessions, and property must be linked to a dedicated circuit.

Expensive Appliances

Is It Better For Your Furnace To Have A Dedicated Circuit?

It follows that when there are multiple linked electronic devices on the same circuit, the available electrical supply will be shared by all of them. Typically, this poses no problems for low-energy consumers like lamps and fans.

Costlier electronics, however, can be more susceptible to power-voltage changes that can occur on shared circuits. To protect your assets, you should think about putting expensive devices on a dedicated circuit.

Wrapping Up

In addition to being required by the NEC, having a separate circuit for your furnace lowers your risk of fire since it acts as current overload protection. A furnace disconnect switch also makes it simple for you to operate your furnace.

However, investing in a dedicated circuit installation is preferable than suffering and paying substantial fines as a result of breaking the National Electrical Code.

Is It Better For Your Furnace To Have A Dedicated Circuit?

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Written by HVAC Contributor

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