INTRODUCTION : https://www.youtube.com/watch?v=4PQUuqePcIM CURRENT : An electric current is a stream of charged particles, such as electrons or ions, moving through an electrical conductor or space. It is measured as the net rate of flow of electric charge through a surface or into a control volume. VOLTAGE: An electric current is a stream of charged particles, such as electrons or ions, moving through an electrical conductor or space. It is measured as the net rate of flow of electric charge through a surface or into a control volume. V = IR Labeling of Cables Residential Wiring Cables Service Drop Cable: Main Feeder Wires: Panel Feed Wires: Non-Metallic Sheathed Wires: Single Conductor Wire Types of Cables and Wires Communications Cable Coaxial Cable Hard line Coaxial or Heliax Cable Radiating or Leaky Coaxial Cable RG-6 Coaxial Cable Triaxial or Triax Cable Twin-axial or Twinax Cable Semi-rigid Coaxial Cable Rigid Line Coaxial Cable Twisted Pair Cable Unshielded Twisted Pair (UTP) Cable Shielded Twisted Pair (STP) Cable Fiber Optic Cables Single Mode or Mono-mode Fiber Optics Cable: Multi-Mode Fiber Optics Cable: Direct-Buried Cable (DBC) Non-Metallic Sheathed Cable (NM, NM-B) Metallic Sheathed Cable (Armored Cable, AC or BX, MC) Armored Cable (AC) Metal Clad (MC) Cable Multi-Conductor or Multicore Cable: Paired Cable Portable or Extension Cord Ribbon Cable Shielded or Screened Cable Single Conductor Wire Single Stranded Wire: Single Solid Wire: Submersible Cable Twin-lead Ladder Line Underground Feeder (UF) Cable: Flexible Cables Stranding in Layer Stranding in Bundles Overhead Power Line: All Aluminum Conductor (AAC) All Aluminum Alloy Conductor (AAAC) Aluminum Conductor Steel-Reinforced (ACSR) Cable Aluminum Conductor Aluminum-alloy Reinforced (ACAR) Bundled Conductors: