For what reason can additional services be permitted in a building?

The correct answer is that additional services may be permitted in a building for different rate schedules. This option recognizes the potential for users within a building to take advantage of varying rate structures offered by utility companies. For instance, certain types of service may be billed at different rates based on the time of day or the amount of energy consumed, enabling occupants to choose a service arrangement that best fits their energy usage patterns and financial considerations.

Different voltages could necessitate separate services, but it is not the primary reason for additional service installations. Maintenance purposes might require multiple services to facilitate ongoing operations without disrupting the entire system, but this is not a standard justification within the NEC guidelines. Likewise, while repair needs could lead to the establishment of extra services, they are generally considered temporary and not a foundational reason for additional services in a building.