Lesson 4 wires and cables

• What is the size classification for wires?

  Wires are conductors 3.26mm or No.8AWG and smaller in sizes.
• What is a wire?

  A wire is a single conductor, most commonly made of copper or aluminum.
• How are cables defined in relation to wires?

  Cables are larger than wires.
• What constitutes a cable?

  A cable consists of two or more insulated wires wrapped in one jacket.
• What are the classifications of wires and cables?

  • Stranded: Contains a group of wires twisted to form a metallic string.
  • Solid: Consists only of a single conductor.
• What are the sizes for copper or aluminum conductors?

  Copper or aluminum conductors range from 1.60mm to 500mm², both stranded and solid.
• What are thermoplastic wires (Type TW) used for?

  Thermoplastic wires are flame retardant, moisture and oil resistant, used for building wiring in dry and wet locations.
• What is the typical construction of heat, moisture resistant and flame retardant cable (Type THW)?

  This cable usually has seven strands of conductors.
• What is the purpose of thermoplastic-covered fixture wire (Type TF)?

  Type TF is used for wiring lighting fixtures and as terminal wires.
• What is the size range for non-metallic sheathed cable (Type NM)?

  Non-metallic sheathed cable (Type NM) ranges from 1.60mm to 2.60mm solid.
• What is the use of copper or aluminum PE insulated wire?

  This wire is weather resistant and used for line wire and primary distribution.
• What is the size range for flat cord (Type SPT)?

  Flat cord (Type SPT) ranges from 1.02mm to 1.60mm stranded.
• What is the function of the air conditioning unit safety cord (Type SPT)?

  This cord consists of two conductors and a ground used for wiring air conditioning units.
• What is the size range for underground feeder and branch circuit cable (Type UF)?

  Type UF ranges from 1.60mm to 11.68mm.
• What are thermoplastic portable cords (Types SJT & ST) used for?

  These cords consist of 2 to 4 stranded conductors used for wiring construction of portable motors and appliances.
• What is the size range for intercom cable?

  Intercom cable is 0.65mm.
• What is the purpose of telephone cable (Type CCP)?

  This cable is installed aerial and duct type for telephone wiring with color-coded conductor insulators.
• What is the size range for submersible pump cable?

  Submersible pump cable ranges from 1.60mm to 11.68mm.
• What is Hypertmp 2000 wire used for?

  This wire is used for winding motors, oil-filled transformers, high-speed winding, and wet winding operations.
• What is the size range for service drop cable?

  Service drop cable ranges from 4.11mm to 11.68mm.
• What is armored cable (Type ACT, BX) used for?

  This cable has 2 or 3 conductors used for wiring installation in buildings.
• What is the size range for welding cable?

  Welding cable ranges from 1.29mm to 11.68mm.
• What is control cable (braided type) used for?

  This is a PVC insulated and jacketed multi-conductor control cable used for wiring installation of machinery controls.
• What is the size range for power cable?

  Power cable ranges from 3.36mm to 1,000 MCM.
• What is temperature wire (Type HI) commonly used for?

  This wire is commonly used for wiring automobile engines and appliances with high temperature, and for switchboard wiring.
• What is the size range for royal cord?

  Royal cord ranges from 1.65mm to 5.19mm.
• What is telephone cable (Type ADT) used for?

  This cable consists of 6 pairs through 909 pairs used for aerial and duct installation.
• What is the size range for appliance or electric heater cable?

  Appliance or electric heater cable ranges from 0.65mm to 2.05mm.
• What is asbestos covered nickel cord (Rockbestos) used for?

  This cord is used for wiring electric ranges, water heaters, stoves, and hairdryers where both heat and moisture resistance is desirable.
• What is the size range for automotive wire?

  Automotive wire ranges from 1.02mm to 6.54mm.
• What is auto cable PVC and braided used for?

  This cable is used for wiring automobile lights and for hook-up wires.
• What is the service entrance cable (Type SE)?

  Service entrance cable consists of two or more insulated conductors with one or more bare conductors for grounding.
• What is self-supporting aerial telephone cable used for?

  This cable is used for aerial telephone wiring with color-coded insulation of conductors.
• What is machine tool wire used for?

  Machine tool wire is used for wiring machine tools, appliances, and control circuits.
• What is coaxial cable used for?

  Coaxial cable is used for radio frequency antenna installation and radar receiver installation.
• What is direct burial telephone cable used for?

  Direct burial telephone cable is used for wiring installation of telephone lines.
• What is Durex wire used for?

  Durex wire is used for building wiring, especially for interior wiring.
• What is the purpose of steel tape armored cable with ground wires?

  This cable is used for general wiring installation, including underground.
• What is Duralene (Type WP) used for?

  Duralene is a polyethylene insulated line wire used for wiring installation of residential buildings.
• What is switchboard semi-rigid plastic insulation?

  It is a stranded cable for wiring switchboards inside power plants.