That 60A number you have for heating/cooling unit is dubious. A 2 ton a/c unit (avg for 2400 sq’ home) draws 50A (requires 25A tandem breaker) on startup and only consumes 10A or so (2KW) when running. My 1-1/2 ton unit is on a 20A tandem breaker and draws about 8A when running fully loaded. Our house is a 4 bedroom, 2000sq’ 2 story.
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