20kw Electric Furnace Wire Size

Let s assume you have a 240 volt supply and that the furnace is a resistive load.

20kw electric furnace wire size. However typically electric furnaces require a draw between 60 and 80 amps. 5kw 17 000 btu s 7kw 24 000 btu s 8kw 27 000 btu s 10kw 34 000 btu s 12kw 41 000 btu s 15kw 51 000 btu s. By multiplying the volts by amps you will receive total wattage. The electric furnace heating element options are displayed within the electric furnace pricing.

In order to properly size the wire per national electric code nec standards you will need to know the amperage and the distance of the device. In this case 20000 240 83 33 amps. I have installed an electric furnace with a 15 kw heat element. Each kw produces about 3400 btu s of heat so the heating output of the various heat strip options are as follows.

In our example for a 67 500 btu output you will need a 20kw furnace. What size wire to hook up a 20kw electric furnace. The size of a breaker is determined by the amp draw. You do this because 1kw can produce 3 400 btu of heat.

I ran number 6 wire with ground from my 100 amp service box where i installed a 60amp double pole breaker. Element size heating output. Divide your btu output by 3 400 to find the kilowatt rating of the furnace that you need. How do i wire an electric furnace with heating elements.