# Question: What electrical wire size does an electric furnace use?

Contents

## What kind of wire do you use for an electric furnace?

15 KW electric furnaces typically require two circuits, one a 30 amp circuit with 10-2 NM-B cable and the other a 60 amp circuit with 6-2 NM-B cable. Most new furnaces will have breaker disconnects in them and that is where the circuits terminate, in the lugs of those breakers.

## How many amps does a electric furnace use?

The exact amps an electric furnace requires is solely based on the size of the furnace and its performance capabilities; however, typically electric furnaces require a draw between 60 and 80 amps. By multiplying the volts by amps you will receive total wattage.

## What is a common size wire used to wire in a residential furnace?

10-gauge are used in electric clothes dryers, 240-volt window air conditioners, electric water heaters supporting 30 amps. 6-gauge are used for cook tops and ranges carrying 40-50 amps. 4-gauge are used for electric furnaces and large electric heaters protected at 60 amps.

## What size wire do I need for a 60 amp electric furnace?

Most everything I read places 60 amps at about #6 but some sources claim #4 depending on a couple of variables. Which is it? If you use conduit for the entire run and THHN conductors then #6 is okay. If you use NM-B cable, then #4 is required.

## Are electric furnace 110 or 220?

The 110 volt part of the system is used for most of the lighting, computers, small appliances and most electric tools. The 220 volt part of the system is usually used for electric stoves, water heaters, dryers, air-conditioners, heating and some larger tools.

## What gauge wire is thermostat wire?

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 size an electric furnace?

Multiply the Btu number you’ve selected by the square footage of your home, to calculate the Btu output of the furnace you need. If you live in a 1,500 square foot home, and your Btu per-square-foot needs are 45, your calculation will be 45 x 1,500 = 67,500 Btu output.

## Does a furnace require a dedicated circuit?

According to building codes, a furnace must be supplied by a dedicated circuit, meaning the circuit cannot supply power to anything other than the furnace. … It ensures that power to the furnace stays disconnected even if someone unwittingly turns on the circuit breaker.

## When installing electric furnaces all aspects of the power wiring circuit are crucial because of?

When installing electric furnaces, all aspects of the power wiring circuit are crucial because? Of the high current draw of electric furnaces.

IT\'S FUNNING:  Your question: Does electricity leave a carbon footprint?

## Should I use 12 or 14 gauge wire?

As long as you don’t put too many lights on the light circuit, you can usually control that circuit with a 15-amp breaker, as well as wire it with a 14-gauge wire. … On the other hand, an outlet circuit controlled by a 20-amp breaker requires a 12-gauge wire.

## Can I mix 12 and 14 gauge wire?

Can you mix 12 gauge and 14 gauge wire? – Quora. If we are speaking of the US the answer is yes however, even if the supply is 12AWG, the breaker must be replaced with a 15 Amp breaker becuase the 14 awg wire is the smaller load carrying conductor.

## How do I choose a wire size?

To determine what gauge wire you need, consider the carrying capacity and the amount of current the wire needs to conduct (measured in amperage or amps). Wire gauge is directly related to how many amps you need to run through it. The distance you need the wire to go can also impact the gauge of wire you need.