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Re: 220 wire size Hello buickanddeere and T-Bone
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Posted by john in la on July 29, 2005 at 04:12:35 from (67.35.234.62):
In Reply to: Re: 220 wire size Hello buickanddeere and T-Bone posted by buickanddeere on July 28, 2005 at 17:26:38:
"Something doesn't jive." I think you are looking at it wrong. The fan (unit) is 7.8 min and 15 amps max. I take this to mean it is about a 10 amp fan. The heater coil is 50.96 amps so lets say 51 amps. 51 amps + 10 amps = 61 amps
To get breakers to be at 80% use you will need about 76.5 amps worth of breakers.
I have 90 amps. A 60 and a 30. Guess a 50 and a 30 would have worked but this is what they put in it.
The heater has 3 coils.
2 are run by the 60 amp braker and 1 is run by the 30 amp breaker. The fan can be run by either breaker so that it will run in heat pump mode or heater mode. In fact if you look at it this way you really need 90 amps to cover every situation because either breaker will run the fan. 90 amps x .80 = 72 amps
72 amps - 10 amps for fan on 1 breaker - 10 amps for fan on other breaker - 51 amps for the heater = only 1 amp over. From what I have read and found out here I feel my wire choices will work. Thanks for the help.
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