Serving the energy industry for over 30 years
By - Jon Brown

Electric Distribution Grounding & Stray Voltage
September 24-25, 2020 | Online :: Central Time

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Overview

The electric distribution ground system is a complex network of various paths and accommodates the return current back to the substation. Ohm’s Law tells us that any current passing through an impedance creates a voltage. If we acknowledge that the ground path(s) is not a perfect a conductor, we know that stray voltage is inevitable.

This course provides insight into the workings of the grounding system from the end user back to the substation. Attendees learn the causes of high ground currents, how they can be minimized, and the techniques to mitigating stray voltage.

Learning Outcomes 

  • Review the basic electrical formulas associated with grounding and stray voltage
  • Identify how transient events create hazards which may be dangerous to the public and utility personnel, as well as damage equipment
  • Review Section 9 of the National Electric Safety Code and learn acceptable grounding methods
  • Review the definitions of commonly used terms such as “effectively grounded” and “bonded”
  • Identify ground resistance measurement for both substations and the distribution system
  • Assess the effects of electricity on biological objects (animals and human beings)
  • Discuss the definition of stray voltage
  • Discuss stray voltage trouble shooting and mitigation techniques
  • Review various stray voltage scenarios

Credits

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EUCI has been accredited as an Authorized Provider by the International Association for Continuing Education and Training (IACET).  In obtaining this accreditation, EUCI has demonstrated that it  complies with the ANSI/IACET Standard which is recognized internationally as a standard of good practice. As a result of their Authorized Provider status, EUCI is authorized to offer IACET CEUs for its programs that qualify under the ANSI/IACET Standard.

EUCI is authorized by IACET to offer 1.0 CEUs for this event.

Requirements For Successful Completion Of Program 

You must be logged in for the entire presentation and send in the evaluation after the course is completed. 

Instructional Methods 

PowerPoint presentations, case studies, and workshop exercises will be used in this program. 

Agenda

Thursday, September 24, 2020 Central Time

8:45 – 9:00 a.m. :: Log In

9:00 a.m. – 4:30 p.m. :: Course Timing 

12:30 – 1:15 p.m. :: Lunch Break


Engineering Formulas Relevant to Grounding

  • Ohm’s Law
  • Kirchhoff’s Voltage and Current Laws
  • Alternating Current
  • Impedance Model
  • Three Phase Power Systems

Transient Event on the Distribution System

  • Lightning Events
    • Surge Arrester Operation
  • Line to Ground Faults
    • Temporary Over Voltage (TOV)

Grounding Methods

  • NESC 2017 Section 9
    • Point of Connection
    • Method of Connection
    • Grounding Electrodes
    • Separation of Ground Conductors

Grounding Definitions

  • Effectively Grounded – Per NEC
  • Bonded – Per NEC
  • Step/Touch

Common Grounding Practices

  • Distribution System
    • Ground Resistance Measurements
      • Earth Ground Clamp Meters
    • Substation
      • Ground Grids
        • Soil Resistivity

Effects of Electricity on Biological Objects

  • Humans
  • Animals
  • Threshold of Perception
  • Threshold of Fatality

Friday, September 25, 2020 Central Time

8:45 – 9:00 a.m. :: Log In

9:00 a.m. – 12:00 p.m. :: Course Timing


Stray Voltage Definition

  • Per IEEE Working Group 1695
  • Stray Voltage vs. Contact Voltage
  • Influential Factors on Stray Voltage

Stray Voltage Mitigation Techniques

  • Phase Balancing
  • Power Capacitor Bank Issues
  • Deteriorated Neutrals
  • Neutral Isolators

Stray Voltage Scenarios

  • Swimming Pools
  • Shower and Faucets
  • Farms
  • Fences and Gates
  • Marina and Boat Docks

Instructors

Jerry Josken, Senior Consultant, Pike Engineering

Jerry holds a BS in Electrical Engineering Technology from the Milwaukee School of Engineering and a 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). Presently, Jerry coordinates Pike Engineering Professional Development Program.


Keary Dosier, Director of System Planning and Grid Analytics, Pike Engineering

 Keary holds a BS degree in Electrical Engineering from NC State University. He is a Director for the System Planning and Grid Analytics division of Pike Engineering, where he has spent 16 years performing engineering studies and delivering solutions for large and small electric utilities across the United States. Keary has spent his career focused on distribution system planning, reliability, protection, DER integration and performance optimization engineering analysis. He has also performed several stray voltage mitigation studies, and in 2004 he co-authored an IEEE PES paper “Stray Voltage: Causes, Impacts, and Mitigation” on the subject.

Online Delivery

We will be using Microsoft Teams to facilitate your participation in the upcoming event. You do not need to have an existing Teams account in order to participate in the broadcast – the course will play in your browser and you will have the option of using a microphone to speak with the room and ask questions, or type any questions in via the chat window and our on-site representative will relay your question to the instructor.

  • You will receive a meeting invitation will include a link to join the meeting.
  • Separate meeting invitations will be sent for the morning and afternoon sessions of the course.
    • You will need to join the appropriate meeting at the appropriate time. 
  • If you are using a microphone, please ensure that it is muted until such time as you need to ask a question.
  • The remote meeting connection will be open approximately 30 minutes before the start of the course. We encourage you to connect as early as possible in case you experience any unforeseen problems.

Register

Please Note: This event is being conducted entirely online. All attendees will connect and attend from their computer, one connection per purchase. For details please see our FAQ

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

Event Standard RateAttendees

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