Establishing A Short Circuit Current Rating Flow Chart

The UL508A SB Flow Charts below were last updated 8/21/2006 to reflect the most recent modification in the process from Underwriters Laboratories. These charts were developed by the Schneider Electric Codes and Standards Department to assist you in understanding the various standards.

> Establish SCR of Individual Power Circuit Components (UL 508A SB4.2)
> Feeder Components that Limit the Short Circuit Current Available (UL 508A SB4.3)
> Determination of the overall short circuit current rating of the panel (UL 508A SB4.4)
   
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