Add the 5 amp PH Pro , allows the use of up to 63 cabs!
Medium to large layouts (6 to 10 operators). As the layout size grows you will need to add boosters. Set up the PowerCab as a programming station (isolated from layout). Change the SB5 to Dumbooster mode then use it to power a 5amp power district. Consider adding radio cabs (and upgrade Powercab to wireless). Use of DCC circuit protection via multiple CP6 or EB1 is highly recommended to isolate the (inevitable) shorts from the rest of the layout