AutoCAD MEP

[#1]

Currently using AutoCAD MEP 2013 and came across an issue. When working with the circuit manager I noticed a difference between the circuit manager and what the actual panel schedule shows.

Example:

The panel is 208/120. The amps should be 162, not 281. It appears the SQRT(3) factor has been missed in the circuit manager. The panel schedule, however, accurately schedules the amps.

58500/208/sqrt(3) = 162 See attached images that show the difference between them.

Just curious if there is a fix for this or if any others have the same issue. (Incase it was something I did) I looked at past projects we did in MEP 2012 and the circuit manager matches the panel schedules.

Thanks,

Chris

[#2 · Accepted solution]

This is a known issue.  It only affects 3-phase panels in circuit manager.  The value is off by a factor of SQRT(3) in Circuit Manager.  The value on the panel schedule is correct.  Our developers have been working to address this issue.

Joshua

[#3]

I have to say, I'm glad I just stumbled across this.  I thought I was losing my mind, trying to figure out why the circuit manager was showing the kVA numbers that it does.