Wire size for electric furnace


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Old 12-31-19, 10:06 AM
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Wire size for electric furnace

I bought a 15kw electric furnace. 240vac 1ph 60hz the manual says supply wire size must be in accordance with NEC codes. What size wire do I need?
 
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Old 12-31-19, 10:21 AM
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What size breaker does it say to install for the furnace?
15kw at 240 volts is 62.5 amps. You probably need at least 80 breaker. I expect #3 copper or #1 aluminum would be OK if they spec an 80 amp OCD.
 
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Old 12-31-19, 06:21 PM
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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.
 
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Old 12-31-19, 08:02 PM
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You could post the make and model of that furnace for us.
 
 

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