"New UL Variable Frequency Drive Standard and Its Effects on Unit Short Circuit Rating" focuses on impact of UL adoption of IEC standard 61800-5-1 on safety requirements for adjustable speed drives with respect to certification of said devices. Developed by NEMA Industrial Automation Control Products and Systems Section Subcommittee on Adjustable Speed Drives, white paper provides clarification to prevent attempts to apply non-relevant requirements to NEMA member products.