Circuit-breakers for overcurrent protection for household and similar installations

This document represents a technical amendment developed by the International Electrotechnical Commission to refine the original requirements for electrical safety devices designed to protect electrical circuits against overcurrents due to overloads and short-circuits. As the first modification to the base standard, it introduces specific updates, corrections, or clarifications to ensure the continued relevance and accuracy of the technical specifications. The amendment addresses emerging technologies, safety practices, or identified issues from the initial publication, ensuring alignment with current industry needs and international safety objectives. It serves as an essential reference for manufacturers, testing laboratories, and regulatory bodies involved in the design, production, and certification of circuit breakers and similar protective equipment. By incorporating these changes, the document helps maintain a consistent global framework for electrical safety compliance without altering the fundamental structure of the original standard. This revision plays a critical role in updating technical parameters, testing methods, or terminology to reflect the latest scientific understanding and practical experience within the field of low-voltage electrical installations.