How to calculte Automatic transfer swicth ampacity based on the NEC

[mustafa]

How to calculate Automatic transfer switch ampacity based on the NEC?:happyno:

 

[ron]

You calculate the loads to be fed, the same way you use the NEC to size a feeder or any other distribution.

 

[mustafa]

You calculate the loads to be fed, the same way you use the NEC to size a feeder or any other distribution.

If the EMDB main breaker i.e ( 1600AT/2000AF) shall i use the ampere frame value as ATS AMP rating?

 

[don_resqcapt19]

If the EMDB main breaker i.e ( 1600AT/2000AF) shall i use the ampere frame value as ATS AMP rating?

No need to do that. The size is based on the loads you are going to connect. If you are connecting all of the loads to the 1600 amp OCPD, then a 1600 amp ATS is fine.

 

[jap]

No need to do that. The size is based on the loads you are going to connect. If you are connecting all of the loads to the 1600 amp OCPD, then a 1600 amp ATS is fine.

This may be a little off subject but I just noticed the picture by your name is of a High Voltage Arc Flash.
I always thought it was a Red Bud tree just like the one I have in front my yard.

JAP>