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Battery Master Switch

Printed From: CONTESSA 32 ASSOCIATION
Category: Technical Help
Forum Name: Electrical Systems, Navigation and Safety equipment
Forum Discription: Problems or questions about Contessa electrical systems
URL: http://www.co32bb.org/forum_posts.asp?TID=649
Printed Date: 28 May 2020 at 10:49pm


Topic: Battery Master Switch
Posted By: Mons Meg
Subject: Battery Master Switch
Date Posted: 02 Mar 2020 at 7:03pm
A quick question for the electrical boffins.

My boat, built in 1979 for a very exacting engineer, has the battery master wired in on the negative side of the circuit. I’m about to fit a shore power battery charger capable of charging two batteries simultaneously but, if I connect the charger's common negative terminal to both batteries, this will bypass the master switch's ability to isolate one battery from another.  After conducting a little research it appears that the norm is for the master switch to be on the positive side of the circuit and that I ought to rewire accordingly. Before I do, does anyone know why my boat may have been wired this way?



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