You can Wblock assemblies of panel components out to disk for insertion later.
Use the Insert Panel Assembly utility instead of the AutoCAD Insert/Explode command to insert a group of panel component footprints with balloons or nameplates. The program establishes invisible Xdata pointers tied to a footprint, and updates them in the Insert Panel Assembly operation.
Use the Copy Assembly utility to copy panel assemblies on the active drawing. 
The Copy Assembly utility copies a group of panel component footprints, balloons, and nameplates. You select the balloons or nameplates to copy with the footprints. The program establishes invisible Xdata pointers tied to a footprint and updates them in the operation.