This article was posted 07/03/2009 and is most likely outdated.

Free Stray Voltage Online Video
 

 

Topic - Stray Voltage
Subject - Free Stray Voltage Online Video

July 3, 2009
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FREE Stray Voltage Online Video


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The term stray voltage has been used for the past 40 years to describe a special case of voltage developed on the grounded neutral system of a farm. If this voltage reaches sufficient levels, animals coming into contact with grounded devices may receive a mild electrical shock that can cause a behavioral response. At voltage levels that are just perceptible to the animal, behaviors indicative of perception such as flinches may result with little change in normal routines. At higher levels avoidance behaviors may result.


The term stray voltage is often applied incorrectly to other electrical phenomena such as electric fields, magnetic fields and most recently electric current flowing in the earth. These phenomena are generally referred to as EMF or Electric and Magnetic Fields. The physiological interactions with these phenomena are different than the mild shock associated with stray voltage. For more information on EMF and other electrical exposures, go to the EMF Page.
The above text was extracted from Midwest Rural Energy Council [http://www.mrec.org/sv-info.html].


We here at Mike Holt Enterprises, Inc. want to contribute to the information about this topic and have placed a free Video on our website that should help you better understand this phenomenon. To view the video, click on the following link or on the image above: http://www.mikeholt.com/strayVoltageVideo.php

For additional information, click here to visit our technical page for articles and links to other publications.

Coming up, you will have the opportunity to see this application in a case study. I’m working on a stray voltage case (public swimming pool) and plan on video taping the investigation as well as the solution. I expect to have the DVD available (at cost plus shipping $15) in early September.
This DVD will be the first of its type in content and visuals from a real onsite case study. Stray voltage (actually neutral-earth-voltage – NEV) is a big problem and will become a bigger problem in the future.

 

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Comments
  • To all theoretical and practical electrical engineers,

    What I sent to Mike Holt’s Forum is a very important question that needs to be answered immediately. Anyone who touches the metal street light pole or traffic pole with stray voltage will get an electric shock. This problem needs to be solved. Remember, all people in the United States including electrical engineers are waiting for an answer.

    Existing lamppost has no grounding rod, but has four anchor rods encased in cement. Adding a grounding rod is not possible in New York City because of all the underground infrastructure. If it was possible though, doesn’t this just add a second potential?

    Would isolation transformer help if neutral was not connected to pole in any way? 88% of the stray voltage poles are from failed and unbalanced neutrals. If not how is this application different from the use in hospital or staging application of isolation transformers?

    You haven’t given an answer to my question. Your answer is not clear and to the point.

    My Question Your Answer My Comments A. Stray voltage What do you mean stray voltage? Stray voltage on metal street light pole or traffic pole 1. Grounding and bonding Follow the Code Not a practical answer 2. Isolation transformer, it doesn’t help, why? Isolation transformer won’t solve an energized pole hazard You didn’t provide the answer “why” (see attached drawing) 3. Bracket with luminaire on wood pole should be grounded You didn’t answer See attached drawing B. Size of fuse for street light luminaire(s) Fuse are optional (recommended) Not a practical answer C. Size of wire for street light luminaire(s)

    100-watt luminaire, 150-watt luminaire, 250-watt luminaire (120-volt); Not a practical answer

    What I need is a concrete answer! Please don’t inform me to search the rest of the Internet for answer.

    Yakov Shmayevich

    Yakov Shmayevich

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