Re: 220 wire size Hello buickanddeere and T-Bone

Posted by buickanddeere on July 29, 2005 at 09:24:54 from (216.183.130.177):

In Reply to: Re: 220 wire size Hello buickanddeere and T-Bone posted by john in la on July 29, 2005 at 04:12:35:

Ok you are providing some info previously missing about the large and small bank of heaters. At 1st it appeared the heater was "one unit".
The fan will run at about 7.8 amp. As 15amp breakers are the smallest common off the shelf breakers. Anything with running currents of less than 12.0amp are considered "protected" by the 15amp breaker.
The fan supply could be tied in at the bottom of the 30 amp heater breaker but that's stretching the 30 amp breaker’s 80% loading rule.
You have to have a local disconnecting means right at the compressor unit.
It would have been cheaper and safer to run a single set of 80 amp breakers in the home service panel. And a single set of #4 copper to the top of the 60 & 30 amp heater breakers.
Two sets paired breakers and four live conductors instead of two running over to the AC equipment. Would have been looked upon better by inspectors as well. They prefer to avoid multiple sources of power into a piece of equipment if possible.
Where is the 40amp short circuit protection breaker, overload thermals and contactor for the AC compressor? Inside or outside?
Where is the top of that 40amp breaker tied to?
I wish I could see the whole setup in person and get an overall grasp of what the manufacture sent you. And I don’t intend to insult by saying what you have worked on and planned your best with, isn’t satisfactory.

Follow Ups:

• Re: 220 wire size Hello buickanddeere and T-Bone john in la 22:31:13 07/29/05 (1)
  • Re: 220 wire size Hello buickanddeere and T-Bone buickanddeere 06:58:42 07/30/05 (0)

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