What must be included in a feeder diagram?

A feeder diagram is a critical component in electrical design as it provides essential information about the distribution of electrical power. The inclusion of all specified elements is vital for a comprehensive understanding of the electrical system's capacity and safety.

Including the calculated load is fundamental because it represents the load that the feeder must supply, ensuring the wiring and protection devices are appropriately sized for the expected demand.

The size and type of conductors used are also crucial. This information ensures that the selected conductors can handle the calculated load while maintaining efficiency and safety standards. Different conductor sizes and types have varying ampacity ratings and physical properties, which can affect overall system performance.

Demand factors are necessary to consider as they relate to the actual usage of electrical loads in a system versus their total capacity. Utilizing demand factors allows for more efficient system design, accounting for the fact that not all loads will operate simultaneously at their maximum capacity.

By incorporating all these elements—calculated load, conductor size and type, and demand factors—the feeder diagram provides a complete and practical representation of the electrical system, ensuring compliance with Ohio Electrical Contractor NEC Code and enhancing safety and efficiency in electrical installations.