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| | Description | |---|---| | Reduced Accessible Voltage Limits | Lowered limits for accessible parts in normal and single-fault conditions | | Revised Creepage & Clearance | Linear interpolation allowed for many Overvoltage Category II (OC II) products | | Refined IP Coding | Specific manufacturer-defined conditions required for ingress protection (IP) marking | | Specified Radiation Requirements | Formal adoption of IEC 62471 for all optical radiation risks |