What must be marked to indicate the load served when a service contains two to six service disconnecting means?

When a service contains two to six service disconnecting means, it is crucial to mark them in a way that clearly indicates the load served. This requirement is outlined in the National Electrical Code, which emphasizes the importance of safety and clarity in electrical installations.

The primary purpose of marking the disconnects is to provide essential information to anyone who may work on or operate the service equipment. This labeling helps end users and maintenance personnel quickly identify which loads are connected to each disconnecting means, thereby facilitating proper operation and maintenance without the risk of unexpected outages or overloads.

Marking serves an educational role as well, making it clear which circuits power specific areas or equipment, and enabling informed decisions during both routine checks and emergency situations. This attention to detail in ensuring that disconnects are properly marked is essential for compliance and for maintaining a safe electrical environment.

In contrast, while rated maximum current, voltage ratings, or securing with locks are important aspects in various other scenarios, they do not directly address the need for clear identification of the load served in this specific context.