It was a GE board and we used holes that were already there for 2 future 400A breakers. We haven't recived the written re-certifcation yet but the GE inspector did not have any issue with what was done.
My problem is that the NEC while allowing taps of feeders and busways does not discuss the tapping of switchboards or panels etc. At least not based upon my review to date. I know it is frequently done under the various "tap rule" provisions but I was surprised when a local code...
I am interested in obtaining input to whether a tap of a bus in a switchboard, panelboard is permitted by the NEC. In looking through the code recently I could not find this although I have seen it done on numerous occasions.
