Are feeder diagrams required to display both demand factors and the calculated load?

Feeder diagrams must display both demand factors and the calculated load to ensure accurate representation of the electrical system's requirements. Demand factors allow for a more efficient calculation of the expected load, taking into account how much demand can be realistically anticipated based on usage patterns. This is particularly important in designing systems that can manage load effectively without being oversized, which can lead to higher installation and operational costs.

By including the calculated load in the feeder diagram, electricians and planners can verify that the electrical system can handle the potential demand without risking overload or system failures. This requirement is aligned with the NEC guidelines, promoting safety and efficiency in electrical installations. Displaying both these elements supports compliance with the code, ensuring that all necessary information is available for inspection and maintenance purposes.