Is it true that a permanent plaque or directory must be installed at each service disconnect location when a building has more than one service?

The statement is true because the National Electrical Code (NEC) specifies that a permanent plaque or directory must be installed at each service disconnect location when a building has more than one service. This requirement is established to ensure clear identification of all service disconnects, which is crucial for safety and emergency response purposes.

In buildings with multiple services, the plaque or directory serves as a vital reference for anyone needing to quickly locate the correct service disconnect in case of an emergency or maintenance work. This practice increases visibility and communication about electrical systems, thereby helping to prevent accidents and ensuring compliance with electrical safety standards.

Violations of this provision can lead to confusion, especially for fire service personnel and maintenance staff who may need to access these disconnects rapidly during emergencies. Therefore, this requirement is not only a matter of code compliance but also a safety best practice.