USB cable wiring pinout diagram @ pinoutguide Pinout of USB cable schematic and layout of 4 pin USB A / USB B / mini-USB jack connector and 4 pin USB A or USB B plug connectorVery simple. Maximum length of cable is about 5 m for AWG20 and 0.8 m for AWG28 cable.4.5/5(64) USB pinout, wiring and how it works! USB A, B 2.0 and 3.0 Cable Pinout. The USB cable provides four pathways- two power conductors and two twisted signal conductors. The USB device that uses full speed bandwidth devices must have a twisted pair D+ and D- conductors. The data is transferred through the D+ and D- connectors while Vbus and Gnd connectors provide power to the USB device. How To Make A High Speed USB Charging Cable For Samsung Find a method of determining the rate of charge, Android App or Charging hub with display. 2a. How to Repair Usb Cable(100% fix) - Duration: 4:16. TechElectroid 544,761 views.