Videos of commercial electrical wiring basics Click to view on YouTube7:00Commercial Wiring Make Up and Trim Work51K views · Feb 10, 2011YouTube › Franck BenedettiClick to view on YouTube19:50Basic Residential Wiring1 views · Sep 16, 2014YouTube › Sam MalteseClick to view on YouTube3:32Industrial Wiring Basics5 views · Jan 3, 2018YouTube › The Bryan Ropar Trade Show ChannelClick to view on YouTube8:02Basic Electrical Residential Wiring51K views · Jul 1, 2018YouTube › S33 ElectricalClick to view on YouTube2:32Industrial Wiring - Control Circuit12K views · Jan 3, 2017YouTube › Ridley LowellClick to view on YouTube10:26What size wire do I use for a breaker. Amperage for wire sizes in residential electrical wiring.4 views · 7 months agoYouTube › Starving ElectricianSee more videos of commercial electrical wiring basics Electricity 101: Basic Fundamentals | Industrial Controls There are three basic three-phase distribution systems in use today. Small commercial buildings and some small industrial plants that have about 50 percent of the electrical load as 120 volt single-phase will have 208/120 volt, three-phase, four wire system. See Figure 5. Figure 5.