Best Practices in Overhead Distribution Line Design

      April 27-29 & May 4-6  12-4 p.m. EDT 

Course Schedule and Topics

Each session will be held from Noon – 4 p.m. Eastern

  • Session 1: April 27

    Overhead Line Design
    Accountabilities and Process 

      • Overhead line design protocols
      • The overhead line design process
      • NESC overview and application
      • NESC general requirements for overhead lines
      • Other considerations in overhead line design

  • Session 2: April 28

    Conductor/Cable Sag, Tension, and Clearance

      • NESC requirements for maximum conductor/cable sag determination
      • NESC and practical requirements for maximum conductor/cable design tension 
      • Conductor/cable sag and tension calculations
      • Conductor/cable sag-tension software 
      • Application examples and assigned exercises

  • Session 3: April 29

    NESC Clearance Requirements

      • Clearances to ground and water surfaces
      • Clearances to buildings and other structures
      • Clearances between conductors, cables and equipment
      • Clearance application examples and assigned exercises

  • Session 4: May 4

    Overhead Line Structure Loading
    and Strength (Part 1)

      • Types and functions of supporting structures
      • NESC requirements for supporting structure design (loading conditions and strength requirements)
      • Determination of mechanical forces on supporting structures 
      • Supporting structure loading application examples and assigned exercises

    Session 5: May 5
    Overhead Line Structure Loading 
    and Strength (Part 2)

      • Overhead line guying and anchoring design considerations
      • Wood poles (types, treatments, dimensions, strength classes, and specifications
      • Manufactured poles (types, characteristics, NESC equivalent designs, and specifications
      • Pole embedment designs
      • Supporting structure loading application examples and assigned exercises

  • Session 6: May 6

    Putting It All Together

      • Joint use overhead line design considerations
      • Examples and exercises in overhead line design scenarios

    Agenda/Learning Outcomes

    Download a Preliminary Agenda and learning outcomes.

    Course Level

    Intermediate/Advanced: No prerequisites; however, completion of Overhead Distribution Principles & Practices (March 30, 31, April 6, 7) is highly recommended. Some advance preparation is required, including a pre-course survey and logging into the line design software platform.

    Click here for more information about course materials and requirements.


    Held in partnership with
    Collaborative Learning, Inc.

    and the

    American Public Power Association

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