danocap1982 wrote:
I just saw a study that had 166 cal/cm^2 and an arc flash boundary of 30'. This is on the primary side of the service disconnect for a facility.
How realistic is that 30'?
166 calories with a 30-foot AF boundary is realistic for the secondary of a 480V, 3750 kVA transformer, but not the primary.
If the label is on the transformer itself then it makes sense because the secondary is exposed when opening the cover.
John M