Without anything
changing from shore power tower (2X 30 AMP breakers) , cables, plugs or receptacle breakers at receptacle panel on aft of boat , or anything else salon breaker panel shore 2 side now indicates a "reverse polarity" light and wont power anything on shore 2 side of boat? There are 2X 30 amp breakers at tower, at boat plug inlet panel, and 2 at salon breaker panel, none tripped! With all shore #2 sub breakers off, at salon main panel AC volt meter, indicates 40 VAC? Interesting? No, when son informed me of this today he indicated when seeing "reverse polarity" light on at salon main panel he didnt try turning on any of the sub breakers to see what would happen, maybe smart he didnt? Dont think any of the main breakers in the system are GFI, never had anything trip on them for 7 years. Anyone have any ideas?
Thanks
Advice from Regal Service below FYI (yes, answer in 3 days)=
Sir,
The issue you are experiencing may be related to a change the NEC (National Electric Code) made in 2011as it relates to marinas and boatyards (Article 555.3).
In 2014 states began requiring compliance with the 2011 NEC standards. The updated code requires marinas to install Ground Fault Protection (GFP)—a device similar to GFCI— in the marina’s shore power system. The GFP is capable of detecting electricity leaking from a circuit in the same way a GFCI does, and it cuts off the supply of electricity to the boat. The updated code required ground fault protection to not exceed 100 milliamps of ground fault current leakage. Most marinas, however, have been opting to provide “ground fault for equipment” (GFEP) breakers at individual boat slips, which disconnects electricity to the boat at 30 milliamps of ground fault leakage.
This matches a new ABYC standard for boats. Boaters connecting to renovated marinas are becoming aware of wiring issues in their boats, and these problems are likely the result of this newly installed, more sensitive equipment. The exact problem within the boat can be difficult to find, increasing the frustration level of boat owners and marina staff.
The list below is not definitive but it does provide some examples of items that may be the cause of the issue you are experiencing.
♦ Inverters/Converters
♦ Ice makers and refrigerators
♦ Generator transfer switches
♦ Older or faulty galvanic isolators
♦ Air-conditioning control boards
♦ Corroded electrical connections
♦ Faulty power cord, splitter or smart Y adapters
The items in that list are the ones noted as reoccurring most frequently, but in reality a wide range of issues can be the cause. I would recommend having an ABYC certified marine electrician perform a systems check on your vessel in order to determine if there is an issue.
