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Old 08-01-2011, 10:27 AM   #1
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wire gauge for furnace


I'm trying to figure out what gauge of wire to run for my new furnace. It is 15 kw and the mca is 67 the run will be about 55 ft

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Old 08-01-2011, 10:49 AM   #2
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wire gauge for furnace


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I'm trying to figure out what gauge of wire to run for my new furnace. It is 15 kw and the mca is 67 the run will be about 55 ft
Is this a heating system furnace or a pottery kiln?

Double check the name plate. 15 KW does not sound right for a furnace.

A 14 gauge wire cable (14-2 Romex) is typical for a gas or oil furnace and 55 feet is not too far for that wire size. That wire will take 1450 watts at 120 volts.

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Last edited by AllanJ; 08-01-2011 at 10:54 AM.
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Old 08-01-2011, 10:51 AM   #3
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wire gauge for furnace


I think this is an electric furnace
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Old 08-01-2011, 11:36 AM   #4
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wire gauge for furnace


It is an electric furnace, single phase 240 volt 15 kw 60 hz
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Old 08-01-2011, 01:28 PM   #5
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wire gauge for furnace


Use 4 gauge copper wires for the furnace circuit (the ground can ge 8 gauge)

The furnace will draw slightly over 60 amps at 240 volts.
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