Posts: 410
Location: With my son on the water | Tuffy boats are wired in Parallel and make the 24 volt connection at the back of the Marinco plug. There are two hot 12 volt circuits going to the back of the plug, that's why there are 2 breakers.
I personally was having lots of issues with this setup so I rewired it. My main problem was the Marinco Plugs are only rated for 40 amps and my Terrova draws 56. Most the time it was fine but during long periods of us the plug go hot and I lost connection.
I rewired my rig and wired it in Series, used a battery tender plug rated for 100 amps, installed a shutoff switch under the console at the jump of the + & so I can shut it off when not in use or particularly during charging which you should do so you don't fry your mother board if you get a voltage spike. A voltage spike can happen anytime your line voltage drops sharply and then comes back up. Like when an AC unit kicks in, well pump, freezer, or the wind.
You can't guess how large of wire to use, look it up on an (AMP/Run length chart). I ended up using 4 gage marine wire as that's what the chart said. Now I only have 1 60 amp breaker and have had zero problems.
Edited by btfish 10/11/2016 4:51 PM
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