At what height should the panelboard be mounted, measured to the top of the cabinet?

The correct height for mounting a panelboard, measured to the top of the cabinet, is typically standardized at 6 feet 6 inches. This measurement is established to ensure accessibility for operation and maintenance, complying with safety regulations and codes, such as the National Electrical Code (NEC). Additionally, this height allows for safe access to the panelboard while accommodating the average reach of most individuals, making it user-friendly for electricians and other personnel who may need to operate the panel.

This standard height helps to create a consistent installation practice across different facilities and types of installations, ensuring that panelboards are not too high to reach safely or interfere with other installations. While options like 6 feet or 7 feet might also seem practical, they do not align with the specific requirement that balances accessibility and safety as effectively as 6 feet 6 inches does.