City inspector caught a 4k sq-ft CNC machine shop with new sub-panel work that was not permitted.
Two metered sections, 1-phase 240VAC 200A panel, and a 3-phase 240VAC 200A panel.
There is 600A worth of breakers on the 3-phase panel, add up all of the machine name plate ratings and there is ~550A.
Inspector was concerned that the 3-phase panel may be overloaded and asked for a load analysis to be done.
The 3-phase panel actually has 175A fuses for mains so one has to assume that the panel isn't overloaded since there haven't been any blown fuse incidents.
So what is the inspector going to want to see exactly for a load analysis?
Is there a method to calculate this?
Or do I use an ammeter and get a running average of amperage, and if so for how long is sufficient, a day, a week or?
Two metered sections, 1-phase 240VAC 200A panel, and a 3-phase 240VAC 200A panel.
There is 600A worth of breakers on the 3-phase panel, add up all of the machine name plate ratings and there is ~550A.
Inspector was concerned that the 3-phase panel may be overloaded and asked for a load analysis to be done.
The 3-phase panel actually has 175A fuses for mains so one has to assume that the panel isn't overloaded since there haven't been any blown fuse incidents.
So what is the inspector going to want to see exactly for a load analysis?
Is there a method to calculate this?
Or do I use an ammeter and get a running average of amperage, and if so for how long is sufficient, a day, a week or?
