On a riser diagram, which item helps identify the required wire sizes?

In the context of a riser diagram, panel references provide crucial information about the electrical panels involved in a system, including their ratings and the expected loads they will carry. This information is essential for determining the appropriate wire sizes needed to safely conduct electricity without overheating or causing failures.

Panel references detail the amperage capacity of a panel, which directly influences the type and size of the wiring that needs to be used to connect to it. By consulting these references, one can ensure that the wire sizes meet the necessary electrical load requirements while complying with safety regulations and avoiding potential hazards.

While other options such as conduit sizes, equipment ratings, and code requirements are relevant to electrical design, they do not directly provide the wire sizes needed for specific circuits in the same way that panel references do. Conduit sizes pertain more to the physical containment of the wires, equipment ratings specify the requirements of individual devices but do not specify wiring, and code requirements establish safety standards that may dictate design but are not specific to wire sizing alone. Therefore, understanding panel references is critical for accurately identifying wire sizes in a riser diagram.