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Heritage Point Community Pool - Electrocution Report  

 
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CBS News reported that on September 3, a 17 year-old female was found dead in a neighborhood pool, and pulled from the water. At the time, authorities said they could not confirm how she died.

 

Wake County Inspections department issued a report on September 9, 2016 after being called upon to investigate the electrical wiring following the drowning death of the teen. Their report concluded that the pool pump motor failed and phase A faulted to ground. The fault current followed the only path available to it, the pool water, creating a voltage gradient across the pool and the pool equipment. Read the report.

 

Mike Holt's Comment: Apparently the pool bonding conductor made some continuity to the pool equipotential bonding system, because there were energized parts in the pool from the fault to the motor. The open feeder neutral prevented the fault current from returning to the neutral point of the utility secondary in sufficient magnitude to blow the fuse; resulting in energized metal parts. If the metal parts of the pool were bonded properly in accordance with 680.26, there would not have been any difference in potential between the pool water and metal parts; most likely this death would have been prevented.

 

Lessons learned:
1. You need to understand the Fundamentals of Electricity (http://www.youtube.com/embed/mpgAVE4UwFw) to ensure that your installations are always safe.
2. You need to understand the NEC Requirements for Bonding and Grounding in general, as well as for pools and spas. (https://www.youtube.com/watch?v=j7r1UyuIgss).
3. An effective ground-fault path is required for all circuits in accordance with Article 250. See http://www.youtube.com/embed/uMhCTiTMqUQ.
4. I strongly suggest that you visit http://www.mikeholt.com/swimmingpoolbonding.php so that you have access to the information on how to verify that the pools for all the people you know are properly bonded. Next month, I intend to visit the homes of all those I know, to verify that the bonding is proper. You should do the same after you have watched my video on how to do this - https://www.youtube.com/watch?v=Q8YLcXRo-Go&feature=youtu.be&t=132

 
 
 
 
 
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Mike Holt Enterprises of Leesburg, Inc. 3604 Parkway Blvd. Suite 3 Leesburg, FL 34748
"... as for me and my house, we will serve the Lord." [Joshua 24:15]
Comments
  • Thanks for bringing this problem to our attention. I am curious if the increase of salt water use in pools is contributing to the increase in pool electrocutions? I know a problem in the electrical is the root cause but do we know the percentage of these pools that are using salt water?

    Johnny  January 4 2017, 1:32 pm EST
    Reply to this comment
  • Reply from: Mike Holt   January 4 2017, 3:59 pm EST
    The conductivity of the water has no impact electrocution in a swimming pool. So this is not a factor.
    Reply to Mike Holt

    Reply from: Johnny Veazey   January 5 2017, 6:58 pm EST
    Thanks for your reply. I don't understand. If the water in the pool could be absolutely pure, wouldn't that prevent electrocution as opposed to any contamination in the water?
    Reply to Johnny Veazey

    Reply from: Mike Holt   January 6 2017, 8:19 am EST
    There is no such thing as pure water, so this is a moot point.
    Reply to Mike Holt


  • Am I missing something? It appears to me that the grounded conductor was not connected when the repair was performed (figure 2 in the report).

    Bruce Boma  December 29 2016, 5:28 am EST
    Reply to this comment

  • Mike, Every once in a while we will get called to repair pool house equipment. Some of these are very old pools. I am not sure when bonding was first required, but have seen some with no bonding to the pool at all. I have explained the importance of proper bonding and get the usual remarks. "You want to tear up my concrete?" or "I have lived here 30 years. Why is it a problem now?" Any thoughts or suggestions?

    Chuck Galarneau  December 28 2016, 7:53 am EST
    Reply to this comment

  • Thank you so much for posting these very important videos. - I hope they can save someone's life.

    Paul Spinosa  December 28 2016, 1:16 am EST
    Reply to this comment

  • Thanks for this life saving suggestion to check our pools and those of our relatives and people we care about for proper electrical bonding.

    I admire your passion for safety and believe you to be a honest and beneficial business man.

    Thanks for all your services and contributions to promote safety through education.

    Abdulgafar Adisa  December 27 2016, 7:38 pm EST
    Reply to this comment


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