Equipment SCCR Comparison Calculator
Compare study-provided available fault current with the marked short-circuit current rating and voltage rating of an equipment assembly.
Enter study and nameplate values
SCCR comparison
About this calculator
Enter the available fault current from a study, the assembly SCCR from the complete equipment nameplate, and the applicable system and equipment voltages. The result compares the entered values directly.
Method and assumptions
SCCR margin = entered assembly SCCR − entered available fault current. The tool also checks whether the entered equipment voltage rating is at least the entered system voltage.
All values are treated as valid, applicable, and from the same equipment configuration. The tool does not calculate fault current, evaluate series ratings, or verify the assembly listing.
FAQs
Where should available fault current come from?
Use the value from the current short-circuit study for the exact equipment location and system configuration.
Can I derive assembly SCCR from the smallest component rating?
No. Use the verified assembly marking or manufacturer documentation for the complete listed configuration.
Sources
Use the adopted electrical code requirements, the current study, and manufacturer/nameplate data for the complete assembly and system voltage.