Mike Holt Enterprises Understanding the NEC

Keeping up with the requirements of the Code should be the goal of everyone involved in electrical safety. Following is what I feel is an important rule in the 2020 NEC®, complete with graphics and a video. I encourage you to use it as a training resource for your organization, and share it with your colleagues.

Marina and Boat Dock Leakage Current Measurement Device [555.35(B)]

The content below is extracted from Mike Holt's Changes to the National Electrical Code textbook, based on the 2020 NEC.

Not enough can be said about the tragedy of electric shock drowning (ESD) and the hazards involved with using electricity around water. Unfortunately, many of the changes or additions to the NEC are propagated by a tragic or near tragic event and these changes should be considered the most significant. One such addition to the 2020 NEC, is a requirement to make available a device to detect and measure leakage current at marinas and boat docks. While there isn't much text in the new section [555.35(B)] itself, there is a ton of info in the Informational Notes that immediately follow.

You can't be serious about electrical safety without taking into consideration the hazards inherent wherever electricity might come into contact with water but to really understand this rule and it's implications, read the attached PDF and make time to watch this important video as myself and a panel of experts discuss this new rule and the informational notes that follow.

For additional information on Marina and Boatyard Safety, visit www.MikeHolt.com/docks.

Click here or on the thumbnail to the left to view or download the PDF of this rule to follow as you watch the video. (2 pages, 69 KB)
Click on the image above to watch the video

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We'd love to hear from you about this series, and the ways you're using it. Send us your comments and feedback by clicking on Post a Comment below. Look out for the next part in this series a month from now, and please share with your colleagues.

This content is extracted from Mike Holt's Changes to the National Electrical Code, based on the 2020 NEC Program.

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Mike Holt Enterprises, 3604 Parkway Boulevard, Ste 3, Leesburg, FL 34748
"... as for me and my house, we will serve the Lord" [Joshua 24:15]
Comments

  • The purpose of the Tool is only to isolate the problem boat -- Not to Analyses Why it is happening.

    To remove the boat causing the problem - So the Water surrounding the boat is NOT Energized - So anyone that may be in the Water ( In the fist place they are NOT Allowed to be in the Water) by Code.

    The 30Ma setting for each Boat Should Trip - but if the Shorted Load is great enough to bypass the Boat Slip Receptacle. It is NOW a BIG Problem for the Boat Slip Operator. His Job is to SAFELY Remove the Problem Boat.

    Why do we need a TOOL to find the problem - since the problem is the boat Owner Problem - not the Marina Owners.

    The Marina Owner primary concern is the protection of people, who may be Exposed to the Dangers of (A Boat that has an Electrical Short problem that HIS System does not clear.)

    POINT - JUST UNPLUG ALL BOATS - RESET THE MAIN - AND PLUG IN EACH BOAT UNTIL THE PROBLEM BOAT TRIPS THE DOCK OUTLET OR THE MAIN AGAIN.

    OWNERS RESPONSIBILITY KEEP BOATS THAT HAVE A WIRING PROBLEM FROM USING THEIR SYSTEM.

    John Gary  January 6 2021, 12:55 am EST
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