Gotcha. I sent you my diagram. Just want to make sure I'm clear. So the Grounding bus and the Negative battery both connect to the same engine bolt?
On Sat, May 30, 2020 at 8:10 AM Joe Della Barba via CnC-List < cnc-list@cnc-list.com> wrote: > You do run a wire to the engine, usually 2 gauge, but only one. Many boats > ends up using the engine block as a ground bus with wires hooked up all > over it. > > Joe > On 5/30/2020 8:01 AM, Brian Davis via CnC-List wrote: > > 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 >> >> > _______________________________________________ > > 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 > > -- Brian Davis 1980 C&C Landfall 38 "Nina" Southeast Florida
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