To remove a label from a group, go to
Ribbon: DM Electrical->One-Line Diagram-> 
Remove Label from Group
Pulldown Menu: DM Electrical->One-Line Diagram->Remove Label from Group
You will be prompted to select the group from which the label will be removed.
Select label group to remove label from:
The Remove Label from Group dialog box will appear. Select the label you want to remove and press the OK button.
You will then be prompted to specify a location for the selected label.
Specify insertion point or [Group with other label/<Remove label>]:
Insertion point: Specify a point on the drawing. The top left corner of the label will be inserted at that point.
Group with other label: Type G to group the label with another label on the drawing. You will be prompted to select a label to group with.
Remove label: Press ENTER or type R to remove the label.