Testing for electrical leakage around dock areas

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williamsmithaud

Member
I just moved to a large lake in central missouri where there are a very large number of private docks around the lake. In recent years the lake authorities have incorporated NEC safety code requirements /inspections before new dock permits can be issued.

However, there are a many old docks dating back 20-40 years old that are not wired according to modern code with proper grounding...GFCI protection etc.

Does anyone know of a way (instrument?) to test the water around or close to these old docks for possible electrical leakage? Could this be done with a VOM meter....if so, how?

There were three deaths last year on this lake due to faulty wiring on docks
 
don_resqcapt19

don_resqcapt19

Moderator
Staff member
Location
Illinois
Occupation
retired electrician
All of the tests can show good, but you can still have voltage between the water and any conductive item that is bonded to the electrical system. This is because we are energizing anything that we bond to the electrical system. This voltage the voltage drop on the utility primary grounded conductor and on the secondary grounded conductor from the source to the main bonding jumper. This voltage should be low, but even a few volts can be a problem for someone in the water.
 
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haskindm

Senior Member
Location
Maryland
This is a very serious and all too common occurance. Here is some information that may help.

This gentleman has done a great deal of research on the problem.
*James D. Shafer, AMS of Harbor Marine
Consultants, Inc., can be reached on email:
kp2r@bellsouth.net

? Obtain, read and distribute the Electrical Shock Hazards pamphlet available from the National Marine Manufacturers Association fulfillment department at (312) 946-6209.
 
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