Which item may be required by the authority having jurisdiction before installation of feeders?

Which item may be required by the authority having jurisdiction before installation of feeders?

• A. A diagram with feeder details including the total square footage of the building supplied by each feeder and the total calculated load prior to applying demand factors.
• B. A schematic showing only the routing of feeders.
• C. A list of color codes for conductors used.
• D. A general floor plan of the building.

Answer: (A)

When installers check feeders, the authority having jurisdiction wants to confirm that the feeders are sized and distributed to carry the expected loads safely. That means showing, for each feeder, how much area or square footage it serves and the total calculated load before any demand factors are applied. This kind of diagram demonstrates the design approach and allows the AHJ to verify that conductor sizing and feeder routes meet code requirements. The other items don’t provide the necessary verification of load and feeder sizing. A schematic that only shows routing doesn’t prove the feeders can carry the loads. A color-code list helps with labeling during installation but doesn’t address load or capacity. A general floor plan is too vague to confirm how loads are distributed among feeders. So, the diagram with feeder details and the total calculated load prior to applying demand factors is what the AHJ may require before installation.

When installers check feeders, the authority having jurisdiction wants to confirm that the feeders are sized and distributed to carry the expected loads safely. That means showing, for each feeder, how much area or square footage it serves and the total calculated load before any demand factors are applied. This kind of diagram demonstrates the design approach and allows the AHJ to verify that conductor sizing and feeder routes meet code requirements.

The other items don’t provide the necessary verification of load and feeder sizing. A schematic that only shows routing doesn’t prove the feeders can carry the loads. A color-code list helps with labeling during installation but doesn’t address load or capacity. A general floor plan is too vague to confirm how loads are distributed among feeders.

So, the diagram with feeder details and the total calculated load prior to applying demand factors is what the AHJ may require before installation.