The HUB-50/100 transformers have two cable outlets, each of which is used for one ground cable, while both are controlled jointly. The SMART HUB-150 has three cable outlets that can be controlled separately using the in-lite app. It is not possible to attach two cables to one outlet. If desired, a CC-2 cable connector can be used to create branches on the main line. A cable plan is essential when installing the ground cable.