Just installed 6 awg wire for front humminbird and 8 awg for console humminbird units, what type of circuit beaker is available for 12 volt units?

don't those use a 5a or so fuse?

I have always just put in a blade fuse at the battery connection, the amperage draw is so little that a breaker is really not needed.

10a. at battery and mfr. recommended at finder.

Yep, the downfall to using large wire, fuses don’t fit.

Typically guys are running large wire from the battery to a circuit breaker or switch, then on to a fuse panel with its own fuses. To turn off the entire circuit, they flip the breaker off.

Grout-scout you are correct, I am just trying to see what breaker is available with the newer boats?

Might not be what you’re looking for, but can’t hurt to post it anyways. I used this little fuse box and bolted it to a switch. Then from the battery to the switch, I used a short 4g battery cable. Finding crimp connectors could be a challenge for the large wire though. I went with 10g because crimp connectors were easier to find. If you’re just wanting the breaker, most are using 50a minnkota type style.

Perko switch

this is what I did also, 6ga. to fuse block with 8 circuit capability. mine powers some acc. for now, I have 10ga. marine tinned wire run to all graphs with fuses at batteries. about to swap tm over to lithium and going to change graph wiring then.

I use the small fuse block as well. I have a main fuse rated for max current at the battery. Then each line coming off the fuse block has unit recommended fuse size. The fuse block is easily accessible at the console, and i removed the fuse coming off the sonar. Those cables are buried under the front deck, and not easily accessible. I have a led switch for each unit on the front deck panel which easily allows me to see if power is at the switch if it's on. You will be surprised at how much current all the units can pull together, and a battery current calculation will tell you how long you will run before you will run a battery down too low. I would setup a low battery voltage on your units so you don't take a certain type of battery down too low. Some types (wet/agm) don't like to go down below 11.2vdc, it is harder on the battery life. Note: I run electronics on a separate battery so I don't run the starting battery down too low. A 55ah battery lasts @ 8 hours with just the 1222 garmin/livescope. Running helix 12 side by side with the garmin uses some juice. I have plenty of batteries, but changing up setup soon with lithium. It not that complicated, but doing the wiring can take up some time. Don't use butt connectors, solder and shrink wrap wiring for everything. I use powerpole connectors on everything, so i can swap batteries in seconds if needed.

Here is a link to see how your battery will do if you know the current values

Battery calculator

Thanks Guys. I ran #6awg to the front helix, and #8awg to console helix. Used a 10awg fuse holder I found at audio shop,
with 20-amp fuse that is waterproof. Soldered all connections and shrink wrap all connections. Thanks for all your advice. Good Lucky Fishing