Stray Voltage Working Group
Charlie Williams, S&C Electric Company, Chair
Jim Bouford, National Grid USA Service Company, Vice Chair
Russ Ehrlich, Pepco Holdings Inc., Secretary
Attendance list passed around. (42 persons in attendance)
Working group web site located at: http://grouper.ieee.org/groups/td/dist/stray/
Past meting minutes discussed. One change made, “Jim Burke, distribution working group, does not address stray voltage.” Changed to read, Jim Burke, distribution neutral grounding working group, does not address stray voltage.
Chuck DeNardo, Principal Engineer, We Energies provided group a Power Point presentation titled “Stray Voltage” Legislative and Regulatory Activity
· Presentation to be posted to the Web Site
Jim Bouford provided details on stray voltage plans & investigations
· Discussions on detection by use of a proximity device
o What voltage level to use 20V or 50V per OSHA/NESC
Wisconsin/Michigan – Telephone co’s need to provide isolation
CA General Order 95 & where does it apply.
Jim Burke – Presentation on Don Zipse’s articles & NEC involvement.
Charlie Williams led discussions regarding 2005 NEC requirements and NEETRAK trying to get the pool water bonding.
o Individuals can provide feedback to NEC code making panels to gain public interest.
Charlie Williams led discussions on PAR (Scope & Proposal)
· Scope – Charlie & group discussed & re-worked wording.
o Motion to accept re-worded scope was approved.
· Purpose – Charlie & group discussed & re-worked wording.
o Motion to accept re-worded purpose was approved.
Charlie Williams will submit PAR for Stray Voltage Working Group to IEEE
Definitions – Discussions began on the Frank Lambert provided definitions section.
· Must have Std. 100 Cooridnation (SCC 10)
· Charlie will review & get out to membership.
Submitted by Russ Ehrlich
Progress Energy has 9 mitigating reactors on their system
· Progress purchased one pool
· 7 less than 1000’ of a substation
Neutral to Earth voltage becoming more prevalent an issue. Pools, showers, spas
· Fiberglass pools w/lack of equipotential bonding
o Water and neutral potential
NEC 2005 Article 680, covers equipotential plane between water & deck.
Jim Bouford, recommends starting on a guide, not how to perform a study.
Charlie, a guide on Neutral to Earth voltage, deals only with pieces of equipment bonded and connected to earth.
Scope: To Address a Neutral to Earth Voltage, contact voltage(s) are outside the scope of this work.
Possible working group paper on contact voltages
Discussions on what should be addressed
Different voltage levels (perceptive, aggravation, danger levels 50V NEC/NESC defined)
Sources (N to Earth, perceived acceptable, aggravation, keep below danger levels)
Causes/reasons & how to address
What resistance to use (500 ohm, 1 K,….)
Should we have a section on current levels
How do you measure
What equipment to use
Need to consolidate
Navy study and IEEE working group working on pacemaker voltages…let go current levels.
Do we need a sub-group to handle contact voltage issues?
Definitions to go into the dictionary
Neutral to Earth (Stray Voltage)
Contact Voltage (Touching an energized )
Equipment to Earth
Ground Fault voltage
Use the term hazardous voltages.
Working group paper, panel session planned for T & D in
Georges Simard, his group is financing two projects
Test & Identify, Load & No load test, identify source, mitigation…..
Charlie Williams provided a presentation. (IEEE 80 reference for current levels)
Discussions followed Charlie’s presentation on is this the best way to present this case……this is not stray voltage.
John Kennedy, Georgia Power Co,
Don’t give the wrong impression to the regulators/lawyers/media
USDA Red Book,
NESC has wording talking about excessive Neutral to Earth voltge….who decides what is excessive.
List of draft definitions, scope and send out an e-mail for comment
Task force for definitions (Jim Boouford, Jim Burke, Frank, Chuck, Chris Mullins) Include references
Who will be in
Charlie to put together stray voltage questionnaire to send out to membership
Seven papers out to membership prior to meeting.