What must be taken into account for calculating service loads in a multifamily setting?

In a multifamily setting, calculating service loads effectively requires a comprehensive approach that includes both individual loads from each unit and the common loads shared across all units. This is crucial because each unit may have varying electrical demands based on appliances, equipment, and occupancy, which can significantly influence the overall service load calculation.

By considering the individual loads of each unit, you account for the specific demands that might be placed on the electrical system, such as heating and cooling systems, kitchen appliances, and any other electrical devices. Additionally, the common loads—such as lighting in hallways, laundry facilities, and shared amenities—must also be included, as these contribute to the total load that the service entrance will need to support.

Neglecting to factor in either the specific loads from individual units or the common loads could lead to an understatement of the system’s capacity needs, resulting in potential overload situations, safety hazards, or insufficient service to meet the demands of the residents. Therefore, to ensure that the electrical system is adequately designed and that it meets safety and functionality requirements, a combined approach is necessary. This makes the comprehensive consideration of D the correct choice for calculating service loads in a multifamily setting.