Each disconnecting means must be marked to indicate its purpose unless what condition is met?

Each disconnecting means must be marked to indicate its purpose to ensure safety and clarity for anyone who may interact with the electrical system. However, if the purpose of the disconnecting means is evident, there is no need for additional marking. This is because an evident purpose indicates that an individual would reasonably understand the function of the disconnect without having to refer to markings or labels.

For instance, if a disconnecting means is located next to an obvious piece of equipment it controls, such as a motor or an HVAC system, its function becomes clear through its proximity and usage context. Hence, marking may be considered redundant in such cases, allowing for clearer and less cluttered visual information in the workspace.