I'm in a project where i have two generators in emergency system each 2500kva, 400v, the paralleling switchgear's main bus is 8000a, my understanding is UL allows up to 5000a, so i was thinking that i'm out of the UL in this part, today i had a meeting with a Asco ATS's representative, he presents a paralleling switchgear with busbar capacity up to 10,000a, i'm not aware of the UL standard, but do we have an exception for the emergency system?