Bev,
Patriot’s battery wiring was upgraded last year. I used 2/0 from the battery negative terminals to the common tie point on the engine block and #2 from the battery positive terminals to the battery switch and then to the starter. #2 was the largest size that could be easily fit on the battery switch. Each battery has a 200 amp terminal mounted fuse to protect the cabling. After rewiring, I noticed a marked improvement in performance. My #1 bank is a single group 31 battery located under the settee in the forward part of the main cabin. Even with the longer distance to the starter, the engine cranks fine. The #2 bank is two group 31 batteries located under the aft part of the settee (just forward of the galley sink). I use the #2 bank for house loads and keep the #1 battery in reserve for starting the engine. With ALL or even just the #2 battery selected, I can start the engine without ‘rebooting’ the chart plotter. I’d also suggest borrowing the correct crimping tool and dies (such as Thomas & Betts TBM6S) to make sure the connections at the lugs are solid. Good luck at rewiring your boat, Ron Ron Ricci S/V Patriot C&C 37+ Bristol, RI <mailto:ron.ri...@1968.usna.com> ron.ri...@1968.usna.com From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Bev Parslow via CnC-List Sent: Friday, December 1, 2017 1:48 PM To: cnc-list@cnc-list.com Cc: Bev Parslow Subject: Stus-List wire gauge What is the best gauge for wiring the battery to the engine? Do I need to go to 1 or 2. We have a voltage drop from 12 to 8 volts.
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