Assign analytical loads to a schematic distribution system in your model.
This video demonstrates the following:
Revit provides electrical engineering load estimating workflows that allow for decision making to be done early on in the design process. Capturing the area-based loads and other electrical requirements natively within Revit allows users to determine what the preliminary building load will be. There are two parts to the electrical analysis workflow.
First, you define the electrical analytical loads, and then you define the electrical analytical system components. In this example, an area-based load named LTG has already been applied to this plan for the lighting. Now, using the System Browser, you can define a conceptual analytical distribution system and electrical elements for it. First, add an electrical analytical power source, such as a utility or a generator. In the System Browser toolbar, click Add Electrical Analytical Power Source. Then rename the power source in the hierarchy to match your project needs. In this example, "Utility Power" is entered. With the power source still selected, click Add Electrical Analytical Bus. These may be used to represent any type of bus in concept, such as a panel, switchboard, busway, motor control center, and so on. Rename the bus, in this case to "Main SwitchGear". Then click Add Electrical Analytical Transformer.
Continue adding electrical analytical distribution elements until the basic infrastructure for the building is complete. As you do, keep in mind that, except for power sources, when a new electrical element is created, it will be supplied by the currently selected element.
For specific loads, you can define an Equipment Load. In the System Browser, with one of your elements selected, click Add Equipment Load. Rename the equipment load, such as "Shop Eqpt" in this example. Again, continue adding equipment loads until your specific loads are complete. Once you have finished creating the hierarchy of elements, you need to ensure they are being supplied with power. In this example, the LTG area-based load is still unconnected. To adjust the power supply, select the element, such as the Area Based Load. Then, in the Properties palette, under Electrical - Circuiting, expand the Supply From drop-down to access the available power supply. This is also available from the Modify tab. Again, expand the Supply From drop-down and choose the element the selected component is to be fed from. In this example, select the Building Electrical Panel to power the lighting. As soon as you do, the System Browser hierarchy updates.
You can further describe these electrical elements from the System Browser. Select an element such as an Equipment Load. Then in the Properties palette, specify the Load Classification, Voltage, Power Factor, or Apparent Load. For instance, to define the Apparent Load, under Electrical - Loads, select the Apparent Load text field and enter a value, such as, "80,000". Continue modifying your electrical elements as needed. Notice that, as you define the elements, the System Browser updates accordingly, which keeps all your analytical electrical system elements directly within the Revit environment. This makes it much easier to determine preliminary building load and load on main equipment components directly within the model.