There is 23 feet of AWG 1 conductor from the open delta transformers to the service panel where the bolted short circuit and arc flash occurred. How do you include the impedance of the conductor with the transformers short circuit current of 6971 amps to get a final lower bolted short circuit current at panel? How do you compute for it? The arc flashed breakers were in OFF position and no load downstream of it as detailed in the link below detailing how the arc flash occured.
The latest IEEE 1584-2018 concludes from additional experiments that 2kA is enough to cause arc flash if the panel has any breakers. They admit the original IEEE 1584-2002 assumed empty panel hence had flaws. My actual case proved it.
and the actual arc flashed breakers: Was this caused by arc flash or just short circuit without any arc flash?