Practical Power Plant Engineering

12Cables and Supporting Equipment

CHAPTER MENU

• 12.1 Cables
  • 12.1.1 Cable Shielding
  • 12.1.2 Conductor Insulation
  • 12.1.3 Armoring and Jackets
  • 12.1.4 Current Ratings
  • 12.1.5 Single or Three Core Power Cables
• 12.2 Power Cables
  • 12.2.1 Power Cable Selection
  • 12.2.2 Sample MV Cable Specification
  • 12.2.3 LV Power Cables
  • 12.2.4 EHV Cables
  • 12.2.5 Power Cable Terminations
  • 12.2.6 Cable Jacket and Wire Color Coding
• 12.3 Control and Instrumentation Cables
  • 12.3.1 Typical Characteristics
• 12.4 Specialty Cables
  • 12.4.1 Ethernet Cables
  • 12.4.2 DeviceNet Cables
  • 12.4.3 Fiber Optic Cables
  • 12.4.4 Thermocouples
  • 12.4.5 FieldBus Cables
• 12.5 Cable Trays
  • 12.5.1 Tray Materials, Support Span, and Loading
  • 12.5.2 Cable Fill and Classification
  • 12.5.3 Cable Minimum Bending Radius
• 12.6 Conduits and Accessories
• 12.7 Bus Duct or Cable Bus Systems
  • 12.7.1 Bus Duct
  • 12.7.2 Cable Bus
  • 12.7.3 Typical Cable Bus Data Sheet
• References

12.1 Cables

Cables and raceways are installed in all the plant areas, indoors, and outdoors at all voltage levels. The plant cable and raceway systems are of design and capability to carry electrical power and data throughout the plant under all the plant operating conditions. Power cables are laid out with spacing and configuration to minimize the effects of overheating, cable induction, voltage drops, and to insure balanced loading on all phases (see Figure 12.1).

12.1.1 Cable Shielding

• Dielectric field [1]: In all the electrical cables, irrespective of their voltage ratings, a dielectric ...