Extruded Power Cable Systems


Extruded cable systems, primarily cross-linked polyethylene (XLPE), are increasingly the cable of choice for new underground transmission throughout the world. These systems offer several advantages over older paper-insulated pipe-type and self-contained cables but require special consideration to properly design, successfully install, and ensure long-term operation. This course will focus on these areas to give the student much of the required background needed to apply extruded transmission cables.


This course will present characteristics of extruded cable systems as compared to other cable types, as well as discuss differences between transmission and distribution voltages where extruded cables have seen applications for 30-40 years. The design studies needed for extruded cables will be discussed, along with installation, operation, maintenance and testing.

Expected Learning Objectives / Outcomes

PDC has identified learning objectives we expect each student to obtain on completion of this course. The student completing this course should be able to:
  1. Have a general understanding of the major components of an extruded cable system including the cable insulation, cable conductor, splices and terminations.
  2. Discuss and describe the types of installation methods that might be used with extruded cable systems
  3. List the types of testing that is done on an extruded cable system and when in a cable project these tests might be performed


The course will be valuable to engineers responsible for planning, operating or designing extruded cable systems.


An engineering degree, preferably in power engineering, is desirable.

Course Outline

  History of Extruded Cable Systems & Comparison to Other Transmission Cable Types
  Cable Materials and Components
  • Conductor Types and Construction
  • Extruded Insulation Materials and Characteristics
  Cable Engineering Design Studies
  • Electrical Stress
  • Ampacity
  • Impedances
  • Pulling Tensions
  Sheath & System Grounding Design Considerations
  • Materials
  • Induced Voltages & Currents
  • Sheath Bonding Schemes
  • Sheath Voltage Limiters
  Extruded Cable Industry Standards and Specifications
  Manufacturing & Quality Control
  • Type / Qualification Tests
  • Routine Tests
  • Sample Tests
  • Commissioning Tests
  Extruded Cable Accessories
  • Joints
  • Terminations
  • Cross Bonding Boxes
  Installation Considerations
  • Installation Types (Direct Buried, Duct, Trenchless, Submarine)
  • Duct Materials and Characteristics
  • Trenching vs. Trenchless and Impact of Casing Selection
  Installation Considerations Continued
  • Thermal Backfill Selection and Impact on Design & Installation
  Operation & Maintenance Considerations
  Extruded Transmission Cable Project Timeline
  Extruded Cable Installation Photos/Video
  Temperature Monitoring of Extruded Cables & Ampacity
  Course Adjourns

This course will be held at the:
Alden Beach Resort
5900 Gulf Boulevard
St. Pete Beach, FL 33706
A block of rooms has been reserved at the hotel at a special rate which will be honored for several days before and after the course.  Reservations must be  made 30 days in advance to obtain this low rate.   Please mention the PDC Ampacity Course when you make reservations.  The hotel is on the Gulf of Mexico, near many restaurants, etc. [map]

John H. Cooper, Principal Consultant. Mr. Cooper is an acknowledged expertin extruded-dielectric cable systems. He has written EPRI reference books on analysis of these cables, has developed industry-standard software, and has been in charge of cable engineering on a great many cable projects.

Continuing Education Units
PDC will issue students a course certificate indicating the number of Continuing Education Units for the course completed based on national guidelines and the number of classroom hours. 1.8 Continuing Education Units (CEUs) will be awarded for successful completion of this course.The CEU is the nationally recognized unit for recording participation in noncredit educational programs. One CEU is equal to ten classroom hours.

Tuition and Enrollment:
The tuition covers the cost for this three-day course and includes extensive course notes, continental breakfast and lunch. Each participant will be furnished a bound set of notes. Included will be an extensive bibliography and selected technical papers. Lodging, transportation, and other meals are not included.