Hvac panel size

[PowerdT]

I have 150A, 3P panel.
The hvac loads are (3) 40A MCA, MOP 50A

Do you think 150A panel should be enough.

I wanted to verify not to run into nuisances problem because 150A 80% continues is at 120A.

Please advice?

 

[infinity]

The MCA has 25% added to the largest load of the unit (typically the compressor) so 3*40 amps is not the actual current with the units running.

 

[electrofelon]

You are good, both from a practical standpoint and an NEC standpoint. I find actual HVAC draw is about 2/3 of the MCA

 

[PowerdT]

You are good, both from a practical standpoint and an NEC standpoint. I find actual HVAC draw is about 2/3 of the MCA

Thanks

 

[petersonra]

I have 150A, 3P panel.
The hvac loads are (3) 40A MCA, MOP 50A

Do you think 150A panel should be enough.

I wanted to verify not to run into nuisances problem because 150A 80% continues is at 120A.

Please advice?

You meet code minimums. Is there some possibility of nuisance tripping? Possibly, but it seems unlikely.

 

[PowerdT]

You meet code minimums. Is there some possibility of nuisance tripping? Possibly, but it seems unlikely.

The panel is only feeding this 3 loads.

Hopefully they should not turn all them on at the same time either for the inrush

 

[kwired]

The panel is only feeding this 3 loads.

Hopefully they should not turn all them on at the same time either for the inrush

After power outage is when that is most likely, but if that is a problem staggered time delays can resolve this.

If they are soft started/VFD driven probably isn't a problem anyway.