Electrical UL/CSA
Electrical UL/CSA > Short-Circuit Current Rating (SCCR)
Short-Circuit Current Rating (SCCR)

Short-Circuit Current Ratings on components and equipment represent the maximum level of short-circuit current that the component or equipment can withstand.  This rating can be marked on individual components or assemblies.  Short-Circuit Current Rating markings are required in UL 508A, the 2007 edition of NFPA 79 and by NEC® sections 409.110, 430.8, 440.4(B) and 670.3(A), and are intended to represent the amount of fault current an assembly can withstand to ensure proper installation.  The UL 508A standard documents the accepted procedures for calculating panel and assembly short-circuit current ratings.  In the Cooper Bussmann SCCR section below you will find educational literature discussing these Code requirements and agency standards, along with a number of products and services to help with issues surrounding SCCR.

 

SCCR Tools
NEC Requirements2008 NEC® SCCR Requirements

The National Electrical Code® has several sections containing requirements for marking equipment with short-circuit current ratings.  These requirements, along with the fundamentals of SCCR, are covered in this document.

SCCR EducationEducational Material

Here you will find literature detailing why short-circuit current rating requirements are being enforced and how to comply.

SolutionsSCCR Solutions

Cooper Bussmann has resources to assist with SCCR concerns.  These include products to raise assembly ratings, along with software and engineering services to help calculate and improve equipment SCCR.