wbd wrote:
Has anyone else on this forum had dealings with Xcel regarding arc flash requests and available fault current?
I have been dealing with Xcel for over 10 years. I remember when their policy was more severe than it is now.
Their policy is clearly spelled out in their 'blue book' Standard for Electrical Installation and Use. They provide tables of infinite bus Short Circuit values based on the supplied transformers. Xcel has a note suggesting the study use multiple scenarios with larger and smaller transformers, to address possible transformer changes. Over the years they continue to clarify that they will not provide any other fault current value to a 'secondary metered customer', Primary metered customers can obtain realistic values, which of course are subject to change.
Their position is that everything be de-energized before it is worked on.