How to set distribution system for panel in Revit? Select a distribution system Phase 3 Wire Distribution 120 / 240 Single Phase 3 Wire Distributions Load either Single Phase 120V panel family from the English-Imperial library folder under Electical\MEP\Electric Power\Distribution. you should find the default 120/240 Single" distribution system already set up in the Electrical settings in revit mep. Properties palette, under Electrical Loads, click the value field for Secondary Distribution System, and select a secondary distribution system. Electric Power Panel with parameters for material and width, height, depth dimensions you can draw it,