Thanks, Joe! I did get a galvanic isolatot, but forgot to say that. The Blue Sea bus link you sent is exactly what i have. But what does that connect to? If not the engine then where?
Brian On Sat, May 30, 2020, 7:53 AM Joe Della Barba via CnC-List < cnc-list@cnc-list.com> wrote: > Don't use the engine for ship's ground. Use one of these: > > > https://www.bluesea.com/products/2127/MaxiBus_250A_BusBar_-_Four_5_16in-18_Studs > > Your AC ground bus will connect to that ground point as well. Speaking of > AC, make sure you have a galvanic isolator. > > Run ONE ground wire to the engine. You don't want your engine block to be > a routine conductor of electricity. > > Here is your lightning ground conundrum: The old way was to connect all > metal together. Coquina came with a ground wire system that connected every > single thru-hull, the mast step, the engine and the keel. The problem with > that is if the zinc does not work perfectly, you can have electrolysis on a > large scale since you have all this metal wired together. I undid all that, > no thru-hulls are wired to anything. The mast is wired to a keel bolt with > 4 gauge wire. The ship's ground bus is wired to the engine with one ground > wire. > > > Joe Coquina > On 5/30/2020 7:32 AM, Brian Davis via CnC-List wrote: > > Hello everyone, > > Hope you quarantine projects are going well. > > I have a question about grounding. I'm currently refitting ALL wiring from > scratch on our 1980 Landfall 38. I literally gutted every piece of wire and > bought all new Ancor tinned marine cables in every guage you can imagine. > She's coming along swimmingly, and I've mapped everything out pretty well > in a 8 page layered diagram that I'm happy to email direct to anyone who > wants it. It's in PowerPoint and about 8mg. > > My question about Grounding is if it's ok to use my engine as the > grounding point? I'm using the similar area for the Negative connection for > the 3 battery banks, but a different bolt to the engine case. Several > appliances including the breaker panels, ACR, battery charger, water > heater, fuel tank, etc require a ground and I'm using a 6 awg green wire > from the engine to a large Blue Sea busbar. Then connected the grounds to > it. > > I've also run a 2awg wire from the mast step to the keel bolt and to one > of the stanchion bases from underneath for lightning protection. However I > kept that all separated and not connected to the grounding. > > Make sense? Or am I missing something? Again, happy to send my diagram for > review. > > Regards, > Brian > South FL > > _______________________________________________ > > 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 > >
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