Electric Distribution Design Basics

Live Streaming Online December 13-14, 2022

An EUCI Program

Click Here to register $1195

If you are unable to attend at the scheduled date and time, we make recordings available to all registrants for three business days after the event

The EUCI Electric Distribution Design Basics course provides a fundamental understanding to safe and durable line construction requirements and techniques. The course begins with a review of basic electrical terminology and moves into an introduction of overhead line construction. All components are well defined. Special emphasis will be placed on single-phase line construction, single-phase service for residential and commercial utility customers. This course folds in applicable sections of the latest version National Electric Safety Code, effective February 2023.  

Learning Outcomes

  • Define basic electrical terms such as: Components of Ohm’s Law, the impedance triangle and power triangle
  • Review the basic concepts of overhead line design including: Conductor Spacing, Clearances, Structural Loading, Span Length, Line Tension and Guying
  • Review of line equipment necessary for line design: poles, pole peripheral equipment (cross arms, brackets, insulating equipment, conductor, transformers, and protective equipment)
  • Review thorough examination of Single-Phase Line Design as line extension of a three-phase trunk circuit.
  • Gain detailed instruction on the design of single-phase residential service including sizing of conductor and service transformer for multiple dwellings
  • Discuss an introduction to single-phase electric underground distribution including equipment such as cable, HV connecting components and service transformers



9:00 a.m. – 5:00 p.m. : CENTRAL TIME

Introductions and Welcome

Power Electrical Concepts and Terminology

  • Voltage, Current, Resistance/Impedance
  • Impedance and Power Triangles

Introduction to National Electric Safety Code 2023

  • Overhead Line Requirements – Part 2
  • Underground Line Requirements – Part 3

Overhead Line Design Fundamentals

  • Line Clearance and Spacing
  • Phase to Phase
  • Phase to Ground
  • Energized Line to Obstructions
  • Span Lengths and Line Tensions

Single-Phase Overhead Line Design

  • Conductor ampacity and strength
  • Pole Material Options
  • Guying

System Protection

  • Overcurrent Protective Devices
  • Fuse Cutouts
  • Reclosers
  • Transient Overvoltage Protective Devices
  • Surge Arresters



9:00 a.m. – 12:00 p.m. : CENTRAL TIME

Overhead Single-Phase Service Design

  • Sizing Single-Phase Distribution Transformers
  • Selection of Overhead Service Conductor
  • Meter Base Installation and Grounding
  • Residential Service with EV Charging

Introduction to Underground Design

  • Radial vs. Loop Underground Lines
  • Underground Cable
  • Dead Front Connecting System


Gary Roberts is a Professional Engineer with over 40 years’ experience in the Electric Utility industry, 25 years plus with TXU, worked on international engagements and currently with DRG Technical Solutions.  Gary is a graduate of the University of Texas at Arlington with a BSEE and a graduate of Southern Methodist University with an MBA.

Jerry Josken holds a BS in Electrical Engineering Technology from the Milwaukee School of Engineering and an MBA from North Central College. During his 30+ year career with Eaton’s Cooper Power Systems, Jerry served in a variety of engineering capacities. Past leadership positions include Chair of IEEE Rural Electric Power Conference (2012) and GLEMS Distribution Equipment/Controls (2013-2014). More recently, Jerry develops and conducts professional development programs on various power delivery topics for EUCI.