||12-30-2010 12:40 AM
Not good at calculations
I have a heat strip from a central unit HVAC. The A/C part is shot and has been removed. The heat strips and fan work just fine, BUT: I have it wired up to a 30 amp breaker and it trips after about ten minutes of running. The heat strips are two parts rated at 5.0KW and 4.6KW, then there is the squirrel cage fan unit which runs good. I've beat my brains out doing calculations and am not sure I'm getting the correct one. Does this unit, based on the heat strips, require a "42" amp service, plus the fan? OUCH! This will mean going to at least a 50 amp breaker to run this in my shop. I do have a 150 amp service in there, but it's half full now, even using the 80% factor. Maybe I'll have to play "Green Acres" and plug in a #1 along with a #5, but not a #2.