The low voltage device master schedule contains the low voltage device types that could be used by a company in a project. See the Master and Standards Databases section for more information about using master databases.
To create and modify low voltage device types in the master schedule, go to
Ribbon: DM Electrical->Devices-> 
Low Voltage Device Master Schedule
Pulldown Menu: DM Electrical->Low Voltage Devices->Low Voltage Device Master Schedule
Low Voltage Device Master Schedule Dialog Box
See the Common Schedule Dialog Box Features section for more information about how this dialog box works. This section describes the Rename, Find, Previous, Next, New, Copy, Save, and Delete buttons.
See the Common Low Voltage Device Information section for more information about the values that can be specified for low voltage devices using this dialog box.
See the Common Groups Dialog Box Features section for more information about creating groups of low voltages devices in the master database.
See the Import from Project Schedule section for more information about importing low voltage devices from a project to the master database.
Current Group: The active low voltage device group is listed here. All of the low voltage device types that are created and modified will be associated with this group.
Select Group: Press this button to open the Low Voltage Device Master Schedule Groups dialog box. See the Low Voltage Devices Project Schedule Groups section for more information about how this dialog box works.
Select Block: Press this button to open the Select Low Voltage Device Block dialog box. This dialog box allows you to choose the block used to represent the low voltage device on the drawing.
You can add more blocks to this list using the Low Voltage Device Block->Edit Master List command.