Allows you to set information used for sizing branch circuits. Opens the Circuit Edit dialog box:
Circuit Edit Dialog Box
The wire size values that are calculated are stored in shared parameters on the circuits. These shared parameters can be displayed in your panel schedule in addition to or instead of built-in Revit parameters. See the Modifying Panel Schedules section for more information.
Distribution Equipment Tree
The tree on the left side of the dialog box lists all of the distribution equipment in your project. The equipment is organized based upon the connections in the model.
Load Panels: If you run the Circuit Edit command with a distribution equipment selected, only the selected equipment will appear in the Distribution Equipment Tree. Press this button to display the rest of the distribution equipment in the model.
Panel Edit: Press this button to close this dialog box and run the Panel Edit command. The currently selected distribution equipment will be selected in the Panel Edit dialog box.
Highlight Panel: Press this button to highlight the selected distribution equipment in the model or on the one-line diagram, similar to the Revit Highlight in Model command. If the device exists on multiple views, you will be prompted to specify a view.
Circuit Lists
The two middle sections list all of the circuits on the selected distribution equipment. If the distribution equipment is a panel with odd and even sides, the odd circuits are listed on the left and the even circuits are listed on the right. Otherwise, all of the circuits are listed on the left and the grid on the right will be blank.
Circuit Details
Information about the selected circuit is displayed in this section.
When a feeder to a downstream piece of distribution equipment is selected, basic information about the feeder is displayed. To make changes to the feeder, use the Panel Edit command. Select the distribution equipment connected to the circuit and make changes in the Feeder Settings section.
When a space is selected that has nothing connected to it, you will not be able to make any changes.
When a branch circuit is selected, changes can be made to the circuit using the fields described below.
Description: The description for the circuit as it will appear on the distribution equipment schedule. This value is added before any other descriptions on the circuit from connected devices.
If Circuit description method in the Project Options command is set to Use Revit circuit descriptions, the Description value is followed by (Controlled by Revit). The Description Prefix, Description Suffix, Description Replacement, and Include Room Name in Description fields are not available.
Description Prefix: Text that will be added to the front of the circuit description.
Description Suffix: Text that will be added to the end of the circuit description. It will be added before the room names if they are included.
Description Replacement: Text that will completely replace the circuit description. The circuit description on the device, Description Prefix, and Description Suffix will not be used.
Include Room Name in Description: Whether the rooms served by the circuit are included in the circuit description.
| • | Default: Use the Include Room Name in Description option set in the Project Options command. |
| • | Yes: Include room names at the end of the circuit description. The names of each area containing devices on this circuit will be listed. This list of rooms may be different from what Revit would show. Revit only shows a single room name if multiple rooms are on the circuit. |
| • | No: Room names are not included in the circuit description. |
OCP Trip: Sets the size of the breaker for the branch circuit. Used to set the Rating value of the branch circuit.
| • | Size automatically: The breaker is sized to 125% of the connected load. |
| • | None: No breaker is used for the branch circuit. The Rating value is set to 0. |
| • | Specific ampacity: The breaker is sized to match the ampacity chosen from the list. |
OCP Frame: Sets the size of the frame for the branch circuit. Used to set the Frame value of the branch circuit.
| • | Same as trip: The frame is sized to match the OCP Trip value. |
| • | None: No frame is used for the branch circuit. The Rating value is set to 0. |
| • | Specific ampacity: The breaker is sized to match the ampacity chosen from the list. |
Wire Callout: The callout for the branch circuit, listing all of the wire sizes.
Voltage Drop: The voltage drop on the branch circuit. This value is based upon the load on the circuit, the wire size, and the circuit length. The calculation assumes the whole load is located at a distance equal to the Circuit Length away from the distribution equipment.
Fault at Device: The fault at the device connected to the branch circuit including both utility fault and motor fault. This value is based upon the wire size and length of the circuit. This value is not calculated if there are multiple devices on the circuit.
Conductor: Sets the size of the conductors.
| • | Default: The conductors are sized based upon the OCP Trip ampacity according to the active sizing option in the Wire Ampacities command. |
| • | Sizing option: The conductors are sized based upon the OCP Trip ampacity according to the sizing option chosen from the list. |
| • | Custom: Enter a custom callout, reactance per 1000', and impedance per 1000' for the feeder in the fields provided. The Neutral, Ground, Conduit, Conduit Fill, and Ambient Temperature fields will be disabled. |
| • | None: The branch circuit does not have any wires. The Wire Callout will be blank. |
| • | Specific ampacity: The conductors are sized to match the wire ampacity chosen from the list. |
Neutral: Sets the size of the neutral wire.
| • | Same as phase: The neutral wire is the same size as the phase wires specified in the Conductor field. |
| • | Double phase: The neutral wire is twice the size of the phase wires specified in the Conductor field. This is accomplished by using two neutral wires. The ampacity of the conductor wires will be derated 80% based upon NEC Table 310.15(C)(1). |
| • | None: No neutral wire is included. See the Neutrals section for more information about this option. |
| • | Specific wire size: The neutral wire is sized to match the wire size chosen from the list. |
Ground: Sets the size of the ground wire.
| • | Size automatically: The ground wire is sized automatically based upon the Equipment ground setting of the ampacity of the branch circuit. |
| • | NEC 250.122 Equipment: The ground wire is sized based upon the Equipment Ground setting for the wire ampacity specified in the Conductor field. |
| • | NEC 250.102 Service: The ground wire is sized based upon the Service Ground setting for the wire ampacity specified in the Conductor field. |
| • | None: No ground wire is included. |
| • | Specific wire size: The ground wire is sized to match the wire size chosen from the list. |
Conduit: Sets the size of the conduit.
| • | Size automatically: The conduit is sized automatically based upon the wires. All conduits are sized using a 40% conduit fill (NEC Table 1). |
| • | None: No conduit is included for the feeder. |
| • | Specific conduit size: The conduit is sized to match the conduit size chosen from the list. |
Conduit Fill: The conduit fill percentage for the branch circuit wire.
Ambient Temperature: The ambient temperature at the location of the branch circuit.
| • | Default: The branch circuit will be sized based upon the Ambient temperature option set in the Project Options command. |
| • | Custom: Enter the ambient temperature in °C in the field provided. Select this option to size the branch circuit based upon the outdoor temperature or NEC 310.15(B)(2). |
Circuit Length: The average distance from the distribution equipment to the devices on the branch circuit.
| • | Default: The lengths are calculated based upon the Circuit Calculation Method option set in the panel in the Panel Edit command. |
| • | Straight line: The lengths are calculated based upon the straight line distance between the distribution equipment and the devices on this circuit. This calculation approximates lengths for wires running directly between devices, typically underground. |
| • | Right angles: The lengths are calculated based upon the distance along the axes of the building between the distribution equipment and the devices on this circuit. This calculation approximates lengths for wires running along the walls of the building. |
| • | Revit calculated length: The lengths are based upon the distance that Revit calculates using the Circuit Path feature. |
| • | Fixed: Enter the length of the branch circuit in feet in the field provided. |
Actual Length: The total calculated length of the branch circuit. If Circuit Length is set to Fixed, this field displays the sum of the Circuit Length value and any wire make-up. Otherwise, this field displays the same value as Circuit Length.
Building Angle: The orientation of the building used when Circuit Length is set to Right angles. See the How Building Angle Affects Calculations article in the knowledge base for more information about this setting.
Wire Make-up: Additional length of wire added to automatically calculated branch circuit lengths to represent make-up in the field.
| • | Default: The length is based upon the Branch Circuit Wire Make-Up option set in the panel in the Panel Edit command. |
| • | Custom: Enter a custom length in the field provided. |
Add Wire Make-Up for Each Device: Whether the length specified in Wire Make-up is added for each device on the circuit. The default is based upon the Add Branch Circuit Wire Make-Up for Each Device option set in the panel in the Panel Edit command.
| • | Yes: The length is added for each device on the circuit. |
| • | No: The length is added once, regardless of the number of devices on the circuit. |
Highlight Circuit: Press this button to highlight the device(s) on the selected circuit in the model or on the one-line diagram, similar to the Revit Highlight in Model command. If the device(s) exists on multiple views, you will be prompted to specify a view.
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Include room names in circuit descriptions: Sets the default for the Include Room Name in Description setting. Display neutral wire count separately from phase wire count: Sets whether the neutral wire is displayed in the Wire Callout. Conduit location: Sets where the conduit size is displayed in the Wire Callout. Ambient temperature: Sets the default for the Ambient Temperature setting. Branch circuit length calculation method: Sets the default for the Circuit Length setting. Building angle: Sets the default value for the Building Angle field. |