Branch Circuit Voltage Drop

This tutorial teaches you how to display the voltage drop on branch circuits.

Open drawing E-2.1,2. There should be receptacles inserted on this drawing that are connected to a circuit.

Display Voltage Drop When Inserting a Homerun

1.Run the Draw Homerun and Loops command.

Ribbon: DM Electrical->Circuit and Homeruns-> dm_elec-circuithr Draw Homerun and Loops

Pulldown Menu: DM Electrical->Circuit and Homeruns->Draw Homerun and Loops

2.Select a device on the drawing that is circuited. Follow the prompts at the command line to insert the homerun and loops.
3.Once the command is finished, press F2. The AutoCAD Text Window will appear.

The voltage drop will be displayed in the command line history.

Display Voltage Drop After Inserting a Homerun

1.Run the Calculate Voltage Drop command.

Ribbon: DM Electrical->Circuit and Homeruns-> dm_elec-recalculateVoltageDrop Calculate Voltage Drop

Pulldown Menu: DM Electrical->Circuit and Homeruns->Calculate Voltage Drop

2.Select a device on the circuit that you just drew the homerun and loops on.
3.A dialog box displaying the voltage drop will open.
4.Press the OK button to close the dialog box.

Change the Voltage Drop on a Circuit

1.Run the Circuiting command. The Circuiting dialog box will open.

Ribbon: DM Electrical->Circuit and Homeruns-> dm_elec-circuit Circuiting

Pulldown Menu: DM Electrical->Circuit and Homeruns->Circuiting

2.Press the Select Circuit from Drawing button.
3.At the command line, select a device on the circuit that you just drew the homerun and loops on. The Circuiting dialog box will open again with the circuited selected.
4.Set Conductor Amps to 40 --- #8.
5.Press the Exit button.
6.Run the Calculate Voltage Drop command.

Ribbon: DM Electrical->Circuit and Homeruns-> dm_elec-recalculateVoltageDrop Calculate Voltage Drop

Pulldown Menu: DM Electrical->Circuit and Homeruns->Calculate Voltage Drop

7.Select a device on the circuit that you just drew the homerun and loops on.
8.A dialog box displaying the voltage drop will open.
9.Press the OK button to close the dialog box.

Display Voltage Drop in Voltage Drop Schedule

1.Open drawing E-4.2.
2.Run the Insert Voltage Drop Schedule command. The Voltage Drop Current Schedule dialog box will open.

Ribbon: DM Electrical->Distribution Equipment-> dm_elec-insertVDSch Insert Voltage Drop Schedule

Pulldown Menu: DM Electrical->Distribution Equipment Schedules->Insert Voltage Drop Schedule

3.Press the OK button to close the dialog box.

The voltage drop schedule will be updated in its current location on the drawing.

If the voltage drop schedule is not on the drawing, follow the prompts at the command line to insert it.

Fix Uncalculated Branch Circuit Voltage Drop

You might get a warning that says the voltage drop is not calculated correctly. This warning appears if you have not inserted a homerun on all of the branch circuits in your project. It lists the branch circuits that need a homerun inserted. To fix this:

1.Press F2. The list of circuits that need to be updated is displayed in the command line history.
2.Run the Circuiting command. The Circuiting dialog box will open.

Ribbon: DM Electrical->Circuit and Homeruns-> dm_elec-circuit Circuiting

Pulldown Menu: DM Electrical->Circuit and Homeruns->Circuiting

3.Select one of the circuits that was listed as the command line.
4.Press the Find Circuit on Drawing button.
If you are asked to view another drawing, press the Yes button. The devices on the circuit will be highlighted.
5.Run the Draw Homerun and Loops command.

Ribbon: DM Electrical->Circuit and Homeruns-> dm_elec-circuithr Draw Homerun and Loops

Pulldown Menu: DM Electrical->Circuit and Homeruns->Draw Homerun and Loops

6.Select a device on the circuit to insert the homerun and loops.
7.Repeat this process for the other circuits that need homeruns inserted.

To see if all of the circuits have been updated, return to drawing E-4.2 and follow these instructions:

1.Run the Insert Voltage Drop Schedule command. The Voltage Drop Current Schedule dialog box will open.

Ribbon: DM Electrical->Distribution Equipment-> dm_elec-insertVDSch Insert Voltage Drop Schedule

Pulldown Menu: DM Electrical->Distribution Equipment Schedules->Insert Voltage Drop Schedule

2.Press the OK button to close the dialog box.

If all of the circuits have been updated you will not see the warning.


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