Steps to calculate short circuit current ratings
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Short circuit current ratings (SCCR) are a critical specification when designing industrial control panels. Determining the appropriate SCCR actually requires no calculations. Instead, there is a simple, four-step process to follow.
The UL Standard for Safety for Industrial Control Panels, UL 508A, includes instructions for calculating a panel’s short circuit current ratings (SCCR), but many people have trouble working through that process. Determining an accurate SCCR is essential to ensuring the safety of people who work on or around power equipment. A panel with an incorrectly calculated SCCR could fail or cause an arc flash, with the potential to cause serious injury or death, as well as significant damage to the facility.