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Reverse polarity alarm ticking - This can't be good

  • Thread starter Thread starter smoothmove
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smoothmove

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Apr 12, 2005
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  1. OWNER - I own a Hatteras Yacht
Hatteras Model
38' DOUBLE CABIN (1967 - 1971)
My neighbor was nice enough to let me park my 1968 38' at his dock for a week while we did some work on our dock. I plugged in to his AC mostly to maintain the batteries. I went over to check things out after it had been there a week and I heard a faint buzzing from the Electrical Panel. Occasionally, there would be a more pronounced - but very brief (< half second) buzz. It's definitely coming from the polarity alarm. What condition can exist on the boat which could cause an intermittent alarm like this? I didn't have a polarity tester with me, but I have to assume his power is correctly wired. On the other hand, I turned off all the breakers as well as the main breaker and it still buzzed. BTW, I had to leave before diving in, so I disconnected the AC. Anyone ever see this? What would be an orderly method of bugging this problem out. Do polarity alarms themselves ever fail?
Eric
 
Last edited:
I would start with a tester and see if you really do have reverse polarity.
 
A loose connection at the dock receptacle can cause that.
 
A loose connection at the dock receptacle can cause that.

Bingo. The old girl is back in her spot and when I got rid of the 100 foot extension cord and adapter/cord and the short boat cable, things went back to normal. Thanks Capt. for the suggestion. It helped me stay calm in the interim.


Here's the new, rain forest endangering, dock.

Eric
 

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