Reverse polarity

TexasBryan

Member
Oct 12, 2017
54
College Station, TX
Boat Info
2001 52' Prima Seahorse
Sold: 2001 Sedan Bridge 400
Engines
Cummins 6CTA 8.3
My marina sent this out to several docks yesterday. Can anyone explain how an issue on a boat could cause reverse polarity in the marina? WD-40 on electrical connections? Thank you!



Good Afternoon,


The Harbormasters asked me to send you an email regarding the recent reverse polarity irregularity occurring at your slips.


The marina’s electrical equipment has been checked thoroughly with no problems found, it is not a marina electrical issue.


It is believed that there is something wrong on someone’s vessel that is causing this irregularity. Some equipment that is coming on or off at irregular intervals, for example a bilge pump, water heater, battery charger, air conditioner, inverter, etc.


The marina is asking that each boat owner check their vessel’s electrical systems and equipment to make sure all is working correctly, and to spray connections/terminals with WD40.


Thank you for your cooperation in resolving this issue.
 
I would speculate that someone has plugged in a device on their boat that is causing the Marina's breakers to trip. We just had this problem at our Marina and the Manager and I went through several pedestals until we found one that tripped the second we switched it on. The shore cables were fine to the boat in question but one feed to the boat tripped immediately when we plugged it in.

The owner was notified that one leg of their shore power was switched off and they needed to address the electrical issue. I haven't heard back as to the exact device that caused the problem.
 

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