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One-Line Diagrams: Creating Your Model in AutoCAD

Friday, December 11th, 2015

<– Return to main How to Use One-Line Diagrams article.

This page describes how to set up your electrical model in AutoCAD using Design Master Electrical.

Create Distribution Equipment

Use the commands in the DM Electrical->Distribution Equipment section to create the distribution equipment to be included in the one-line diagram.

Press the Block Settings button to set some values specific to how the distribution equipment will appear on the one-line diagram.

If you are using the Generate Riser command you need to specify the elevation of the distribution equipment. If you generate the riser after the distribution equipment has been inserted on your plan view drawings, the elevations should work out correctly. If you are generating the riser first, you need to intentionally set the elevation. You want to use the Relative to ground option and set the absolute elevation for each piece of distribution equipment.

The Insert Feeder to Distribution Equipment checkbox controls whether there is a feeder to the piece of distribution equipment. Turn this off for equipment that is directly connected to the upstream equipment and does not need a feeder displayed.

The Initial Block field controls the block that is first used during the Generate commands for the equipment. After the equipment is inserted, use the DM Electrical->One-Line Diagram->Change Graphics command to change the block that is used for a piece of equipment. Changing this value will not change the block once it is inserted on the drawing.

The Initial Fed From field is used during the Generate Riser command to control whether the equipment is fed from the top or bottom. The initial feeder will approach the equipment from this direction. Once the equipment is inserted on the drawing, you need to manually adjust the feeder if the direction it is fed from changes. Changing this value will not change the feeder route once it is inserted on the drawing.

The Upstream OCP Block field controls the graphics used for the OCP shown on the feeder coming to this distribution equipment. Changing this field does change the graphics on the drawing after the feeder has been inserted.

The Circuit OCP Block field controls the graphics used for the OCP for the feeders coming from this distribution equipment. Changing this field does change the graphics on the drawing after the feeders have been inserted.

Connecting Distribution Equipment

Use the DM Electrical->Distribution Equipment->Distribution Equipment Connections command to connect distribution equipment to each other.

The Breaker / Tap, Top Lugs, and Feedthrough selection will change how the feeder is connected between the two pieces of distribution equipment.

Use the Set Connection Layer System button to control the layer that the feeder is inserted on.

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