Service Switchboard Size

[Alwayslearningelec]

So riser says this service switchboard is 2500A and the schedule says 4000A as you can see. Obviously a mistake I'd imagine.
They are calling for (6) sets 600A based on that 2500A seems correct. Not sure why schedule indicates 4000A

 

[infinity]

600 kcmil=420 amps*6=2520 amps, nowhere near 4000 amps. Your third graphic clearly indicates a 2500 amp OCPD.

 

[Alwayslearningelec]

600 kcmil=420 amps*6=2520 amps, nowhere near 4000 amps. Your third graphic clearly indicates a 2500 amp OCPD.

Yes but the schedule indicates 4000a. Why? Mistake?

 

[hillbilly1]

There is a lot more screwy than that, 400 amp frame with 20 amp trip ratings? Yet load va doesn’t match?

 

[infinity]

Yes but the schedule indicates 4000a. Why? Mistake?

Given the numerous other errors I would assume that it was a mistake.

 

[DrSparks]

There is a lot more screwy than that, 400 amp frame with 20 amp trip ratings? Yet load va doesn’t match?

Do they even make 20 amp trip units for a 400 amp frame??

Sent from my BE2028 using Tapatalk

 

[DrSparks]

Probably a lazy engineer cutting and pasting old specs would be my guess.

Sent from my BE2028 using Tapatalk

 

[infinity]

Do they even make 20 amp trip units for a 400 amp frame??

I would say for an off the shelf product no. If you wanted to spend a million bucks then maybe.

 

[Charged]

The MDP schedule is generated from the revit software. That format is generic format when you don’t do much to it. I usually generate one to see what the loads are coming in at but let the single line do the specifying. Typically I don’t do a schedule if I have all the loads and overcurrent protection devices on single line. My guess is they were using it for load calc and didn’t mean to put it on drawings or were careless when doing so. Send RFI if that’s possible to verify.