Learn how to calculate and increase SCCRs
May 05, 2021As the demand for electric power continues to increase, so does available fault currents. When available fault currents exceed a panel’s short circuit current ratings (SCCRs), there can be catastrophic results.
Watch our new video "Learn How to Calculate and Increase the SCCR" for an overview of the popular method using the UL 508A Supplement S-B, which includes:
- Step 1: Evaluating the SCCR of each branch circuits
- Step 2: Evaluating all the SCCRs for the components in the feeder circuit
- Step 3: Identifying interrupting ratings for each overcurrent protective device
- Step 4: Finding the lowest value from steps 1 through 3