One-Line Device Connections

The One-Line Device Connections command is used to connect one-line devices to each other.

To connect one-line devices, go to

DM Electrical->One-Line Diagram->One-Line Device Connections

One-Line Device Connections Dialog Box

One-Line Diagrams--One-Line Device Connections Dialog Box

Step 1: Select the Device that is Being Fed (Downstream Device)

Begin by selecting the device that is going to be connected in the Step 1 section of the dialog box. This device is the downstream device that is further from the utility. This device is also commonly called a sub-feed panel or a sub-panel.

Generators are not listed in this step. They cannot be connected to other devices.

Step 2: Select the Source that Feeds the Device to be Connected (Upstream Device)

Select the device that the first device is going to be connected to from the Step 2 section of the dialog box under Source. This device is the upstream device that is closer to the utility.

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Source 1: Make the connection for the first source of the downstream device. Available for all one-line device types.

Source 2: Make the connection for the second source of the downstream device. Available for UPSs and transfer switches.

Source: The upstream device that the downstream device is connected to.

The Utility selection at the top of the source list is a special connection option. It is not a one-line device that is created by the user. It represents the connection the utility that is beyond the definition of the project you are designing. Select this for the utility transformer or any other device that is connected to the utility.

Breaker / Tap: All devices will allow you to select Breaker / Tap as the connection type. Select the breaker or tap to connect to using the Odd Breakers / Taps or Even Breakers lists.

Top Lugs: This selection is available for panels, switchboards, breakers, disconnects, and transfer switches that have their Lugs set to DOUBLE.

Feed Through: This selection is available for panels, switchboards, breakers, disconnects, and transfer switches that have their Lugs set to FEEDTHRU.

Odd Breakers / Taps: For panels, a list of the odd breakers. For all other one-line devices, a list of all the taps. The breaker or tap selected in this list will be used for the connection when the Step 3 button is pressed. The top blank entry will be selected for panels when an even breaker is used for the connection.

Even Breakers: For panels, a list of the even breakers. Not used for all other one-line devices. The breaker selected in this list will be used for the connection when the Step 3 button is pressed. The top blank entry will be selected for panels when an odd breaker is used for the connection.

View Source Device: Press this button to view the currently selected Source panel. A list of all the breakers or taps for the panel and their descriptions will be displayed.

Change Number of Poles: Press this button to change the number of poles of the currently selected circuit. When connecting to panels, it is necessary to create a breaker that is the right size before making the connection. Multiple 1-pole breakers will not be merged into a single 3-pole breaker. See the Change Number of Poles section for more information.

Set Connection Layer System: Press this button to change the layer system of the selected breaker or tap.

Step 3: Connect the Device

After you have selected the two devices to connect and configured the source device connection, press the Step 3 button to make the connection.


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