Alan I have the book. To the best of my knowledge I have three ground bus bars. One behind the electrical panel, engine block and one in the V berth. I installed the v- berth one when I installed the windlass. The windlass grounds directly to the battery, however I also installed a wash down pump and macerator pump that are grounded to a bus bar and the that grounds to the windlass ground in the v-berth. Sounds contrary to what you said.
Mike PERSUASION C&C 37 K/CB Long Sault > On Aug 14, 2018, at 12:53 AM, ALAN BERGEN via CnC-List > <cnc-list@cnc-list.com> wrote: > > Hi Mike: > > A good book for you is Nigel Calder's "Boatowner's Mechanical and Electrical > Manual". In the book, it says: "All equipment should have an insulated > ground that leads back to a central ground bus bar in the main distribution > panel, which in turn leads to a common ground point or bus." In other words, > don't connect one ground to another, and then to the ground bus. Each piece > of equipment must have it's own ground going to the ground bus. > > Alan > > >> On Mon, Aug 13, 2018 at 4:25 PM, Mike via CnC-List <cnc-list@cnc-list.com> >> wrote: >> Hi Alan >> >> >> >> The readings I posted are at anchor in the Thousand Island area. I almost >> never plug in during the cruising season. I only use shore power to charge >> the batteries during winter layup when the solar and wind are removed, every >> 6 to 8 weeks >> >> >> >> So today I did more testing. I disconnected the positive cable for the >> start battery and I still saw 0.02V at the prop shaft. So I ruled out that >> as an issue. I disconnected the battery charger and still saw voltage. >> Next I took the wind generator out of the equation and the results were the >> same. Next I disconnected the windlass, same results. Next I moved inside >> and checked for voltage on the tube for the centre board pendant. Saw 0.25 >> V. I removed the positive cable to the house electrical panel. Still saw >> voltage. >> >> >> >> Am I doing this right. My memory tells me that the way I’m testing might be >> creating some kind of battery but my memory might be tricking me. >> >> >> >> Could really use some help from any electricians or corrosions specialist >> out there. >> >> >> >> >> >> Mike >> C&C 37 K/CB Shoal draft >> Persuasion >> Stormont Yacht Club >> >> >> >> From: ALAN BERGEN via CnC-List >> Sent: August 9, 2018 5:23 PM >> To: C&C >> Cc: ALAN BERGEN >> Subject: Re: Stus-List Galvanic corrosion >> >> >> >> You can use aluminum anodes in fresh water. That's what I use. They're >> cheaper than magnesium. >> >> >> >> To test for stray currents, borrow a clamp on ammeter. Then check the AC >> line supply for your boat, and for the boats in nearby slips. The ammeter >> should read zero amps. Use the lowest scale, as stray currents could be >> pretty low. If the reading isn't zero, some of the current is finding a >> return path, other than through the AC supply line. >> >> >> >> Alan Bergen >> >> 35 Mk III Thirsty >> >> Rose City YC >> >> Portland, OR >> >> >> >> >> >> On Thu, Aug 9, 2018 at 6:01 AM, Mike Taylor via CnC-List >> <cnc-list@cnc-list.com> wrote: >> >> Hi Bob >> >> >> >> I started the season with 1.5 anodes. I’m in fresh water, Lake Ontario and >> St. Lawrence river. I believe I have the correct anodes for fresh water. I >> really don’t want to go the galvanic isolator route >> >> >> >> Mike >> >> >> On Aug 9, 2018, at 12:04 AM, Robert Boyer via CnC-List >> <cnc-list@cnc-list.com> wrote: >> >> What is the condition of your shaft zincs? >> >> >> >> Are you in fresh water or salt water & do you have the correct zincs for the >> type of water your boats in? >> >> >> >> Sounds like you may need a galvanic isolator... >> >> >> >> Bob >> >> Bob Boyer >> >> S/V Rainy Days (1983 C&C Landfall 38 - Hull #230) >> >> Blog: dainyrays.blogspot.com >> >> Email: dainyr...@icloud.com >> >> Annapolis, MD >> >> >> On Aug 8, 2018, at 8:10 PM, Persuasion37 via CnC-List >> <cnc-list@cnc-list.com> wrote: >> >> >> Hey folks >> >> >> >> I’m looking for some help. Persuasion is suffering from galvanic corrosion >> or stray current corrosion or something. When I connect a multi meter, >> ground to engine and positive lead to various place like keel bolt, mast and >> through hull I see ~0.5V. Today I changed out the controller on the wind >> generator, with the circuit breaker open I saw 2.4V on the battery leads. >> Also the prop shaft was tarnished looking as well as the prop when I hauled >> out to do the centre board. >> >> >> >> Before I call in the calvary can anyone advise me how to tackle this >> methodically and what I should look for. >> >> >> >> >> >> Thanks in advance >> >> Mike >> >> PERSUASION >> >> C&C 37 (k/cb) shoal draft >> >> Long Sault >> >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each and >> every one is greatly appreciated. If you want to support the list - use >> PayPal to send contribution -- https://www.paypal.me/stumurray >> >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each and >> every one is greatly appreciated. If you want to support the list - use >> PayPal to send contribution -- https://www.paypal.me/stumurray >> >> >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each and >> every one is greatly appreciated. If you want to support the list - use >> PayPal to send contribution -- >> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.paypal.me_stumurray&d=DwICAg&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=9w3G7Cf8YfQnrjmtuNxwDJYr3JMv9f1pAfgAJ9xXYQQ&m=fJAQMdpX2dTSopdOWc3l9uX5S1WMFKlmsA86BrWxBCw&s=6TDTN3EQ7I80Q-k6fidTyrTJYYR_NiZP1etzSo1Nj8E&e= >> >> >> >> >> >> >> >> >> >> This email has been checked for viruses by Avast antivirus software. >> www.avast.com >> >> >> >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each and >> every one is greatly appreciated. If you want to support the list - use >> PayPal to send contribution -- >> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.paypal.me_stumurray&d=DwICAg&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=9w3G7Cf8YfQnrjmtuNxwDJYr3JMv9f1pAfgAJ9xXYQQ&m=c8oAg3HufEQQhnh3c0TUBiMhBe_f6MUw10PjHiFfa0w&s=o2DCU1_NuNDtcks9SUOkET3y4RHvykWw6MSK4trVGuI&e= >> >> > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each and > every one is greatly appreciated. If you want to support the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray >
_______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
