Reesh14
Electrical
- Aug 3, 2005
- 38
Hi. I have a question concerning HVAC rooftop units. I have two units, RTU-1 (MCA:174A, 208V) and RTU-2 (MCA:174, 208V) going to a 250A, 3 phase, 120/208V Panel. How do I calculate/figure out if these two units can both be fed by this panel? Normally, I would take the FLA (mca/1.25) and convert to kva for both units, then add up the kva's and convert to total connect amps. If this value is less than 250A, it would be okay to do so. I am not sure if this is right, or if I should take a diversity factor of .8 of the connected amps to get the demand load of the panel. Please tell me how you would approach this situation. Thank you.