Services equipment must be marked with available fault current and include what other information?

The correct answer emphasizes the critical nature of including the date when the fault-current calculation was performed. This information is vital because it ensures that the data is relevant and accurate regarding the system’s current status. Fault current levels can change based on system configurations, components, and load adjustments. By marking the service equipment with the date of the fault-current calculation, it allows users and maintenance personnel to understand the validity of the information, ensuring safe operation and compliance with the NEC.

Including such a date helps in assessing whether the fault-current values are still applicable or if a reevaluation is warranted due to changes in the system. This can significantly impact safety protocols, maintenance, and inspection schedules, which are crucial for preventing electrical hazards.

In contrast, the operational manual, the installation contractor's name, or the price of services do not provide crucial safety or operational data about the electrical service equipment itself. These elements may be useful for different purposes but do not serve the primary objective of ensuring that safety and operational integrity are maintained based on the most recent calculations related to fault current. Thus, they are not the appropriate information to accompany the fault-current marking.