Free Trial Download and try today

How to Make Dashed Conduits and Cable Trays

Posted on September 19th, 2018. Last updated on June 15th, 2023.

It is possible to make conduits and cable trays that are dashed using Design Master Electrical, but there are some limitations.

Set the Layer System Options Correctly

Run the Layers command.

Select the layer system that you want to be dashed on the Layer System grid. Press the Edit System button.

Uncheck the Conduits and Cable Trays are solid box.

Press the OK button to save your changes and return to the Layers dialog box.

Set the Main Conduit/Cable Trays to Not Plot

The layers used for the main conduits and cable trays need to be set to not plot. With the same Layer System active, select the following layer keys in the Layer Key grid in the top right.

  • CABLE TRAY-GENERAL-2D
  • CABLE TRAY-GENERAL-HANGER
  • CONDUIT-GENERAL-2D
  • CONDUIT-GENERAL-HANGER

For each layer key, uncheck the Plot box in the grid at the bottom of the dialog box.

Set the Linetype of the Hidden Ductwork Layers

The layers used for the hidden conduits and cable trays need to be set to the dashed linetype you want to use. With the same Layer System active, select the following layer keys in the Layer Key grid in the top right.

  • CABLE TRAY-GENERAL-2D-HIDDEN
  • CABLE TRAY-GENERAL-HANGER-HIDDEN
  • CONDUIT-GENERAL-2D-HIDDEN
  • CONDUIT-GENERAL-HANGER-HIDDEN

For each layer key, set the Linetype column in the grid at the bottom of the dialog box to DM_DM-DASHED.

Limitations

The first limitation is that the lines will appear continuous while you are working on the drawing in AutoCAD. It is important for the double-line redraw function that you do not freeze the non-plotting duct layers.

The second limitation is that dashed duct systems will no longer generate hidden lines automatically. You will need to draw those in yourself.

The limitations are an unfortunate result of how AutoCAD generates hidden lines and not something that we can work around.

Updating Existing Drawings

If you make these changes in a project where you already have conduits and/or cable trays drawn, run the Update Drawing Layers to Match Project List command to update the layers in your drawing to match the changes you made in the Layers dialog box.

Redraw the lines on the conduits and/or cable trays using the Draw 2D Conduit or Cable Tray command.

How it Works

Normally, the main conduit and cable tray lines are drawn at the proper elevation using faces. Hidden conduit and cable tray lines are drawn at a very high elevation.

When the AutoCAD HIDE command is run, the faces properly obscure other faces below them. The dashed hidden lines always appear.

Unfortunately, the face entities used for the main conduits and cable trays always appear as a CONTINUOUS linetype, no matter what setting you choose for it.

When you uncheck the Conduits and Cable Trays are solid box, the hidden lines are drawn at the same elevation as the faces.

Setting the faces to not plot turns them off so they do not appear on your final drawing and all you see are the dashed hidden lines. The hidden lines can display your dashed linetype.

Even though the faces do not plot, they still hide items, giving you some of the benefits of automatically hidden lines.

Related Articles

Filter by
Post Page
Electrical HVAC Installation, Licensing, and Software Management Training Recording Electrical Training ElectroBIM Calculations HVAC Training Electrical Drafting Electrical Customization
Sort by

Working Remotely With Design Master

Here are a few ways you can continue using Design Master collaboratively on projects while working remotely.

0

Training Recording: Elevation Labels and 3D Drafting Options

This training video teaches you how to customize elevation labels and 3D drafting using the Design Master Electrical Options menu.

0

Arc-Flash Settings and Sensitivity (IEEE Std 1584-2002)

There are several factors that can influence arc-flash calculations, such as the working distance and whether the distribution equipment is enclosed.

0

Training Recording: 3D Modeling

This training video teaches you how to prepare your Design Master Electrical drawings for 3D coordination.

0

3D Coordination

This training video teaches you how to prepare your Design Master HVAC drawings for 3D coordination.

0

Minimum Conduit Size

You can set a minimum conduit size using the Wire Sizing customization commands.

0