I have had very little exposure to electric heating in my years. Probably less than 6 units I've touched in almost 30 years of work. With the Snow-mageddon event, I've had a lot of questions surrounding circuits for HVAC units: condensers, heat pumps, furnaces, and air handlers with supplemental heating. Fairly routine stuff except for older homes where the air handler is feed with a 90-100 amp branch circuit.
In my past, I have seen:
1. (What my journeyman called) a double disconnect used. Can't remember if it was fused or not.
2. A primary 60A and a second 30A or 60A circuit brought to separate disconnects.
My question is, for those of you that commonly encounter this scenario, what are the typical methods you employ to handle the 90-100A scenario?
In my past, I have seen:
1. (What my journeyman called) a double disconnect used. Can't remember if it was fused or not.
2. A primary 60A and a second 30A or 60A circuit brought to separate disconnects.
My question is, for those of you that commonly encounter this scenario, what are the typical methods you employ to handle the 90-100A scenario?