i might be sorry i bring it up here ....
i've noticed quite a few poco updates, x-formers are closer , and of a higher kva
existing services come to mind....
concerning the arc flash calc, which is done in part with via the poco's Xformer kva and impedance , the AIC then changes....
More important than the arc flash calculation is the withstand rating of the premise electrical system. As transformers are located closer and upsized only a truly sharp electrician will recognize the hazard that may be created by a newly inadequate withstand rating of the previously installed premise wiring system. I doubt that the idea ever crosses the power utilities collective mind to check for the withstand of installed equipment when they effectively increase the fault current that the served premises wiring systems will be subjected to.
--
Tom Horne
