B331 - red and black switches -
- Thread starter Bluenose
- Start date
From the factory red cuts the positive line and black cuts the ground line. Doesn't make much sense to ever cut the ground line so some owners replace that junction with a bus bar, and repurpose the black switch as an emergency crossover between banks.
Beneteau Wiring Diagrams - Maine Sail's corrections - Just in case you have a friend with a Beneteau and want to help him with his snafued wiring Reply #8
https://forums.sailboatowners.com/i...-red-electrical-switches.191463/#post-1456512
https://forums.sailboatowners.com/i...-red-electrical-switches.191463/#post-1456512
The reds are really just an on/off switch for each battery. As a Beneteau owner now with THREE reds and no black, you do not need to rewire. Just trun on the red switches for whatever battery(s) you want to use. You can turn off a suspected bad battery. I turn one of the three off when I anchor or at the dock so if one battery goes bad and drains the other (this past spring). After starting the engine, turn on the "off" battery and equally charge all batts. I changed that black switch to red when I did my massive boat rewire (windlass, inverter, 3rd batt, Victron). PM me for details.
So while all the other folks are rummaging around in their battery banks unbolting their battery cables for winter battery stowage, Beneteau owners simply switch off the positive red disconnect, the negative black disconnect and their batteries are isolated. Done.
This assumes that some too-smart DIY owner or yard monkey has not run wiring direct to the battery. I have a bilge pump direct wired that has to disconnected when on the hard.
This assumes that some too-smart DIY owner or yard monkey has not run wiring direct to the battery. I have a bilge pump direct wired that has to disconnected when on the hard.
Sadly at least on 2014 models Beneteau themselves run the bilge pump, courtesy lights, high water alarm, and stereo memory circuit directly off the battery, bypassing the switches. That adds up to enough to partially discharge the batteries over a winter, so there's still rummaging to be done.