Battery Disconnect To Replace 1-2-Both

[ggray]

I have read that the usual 1-2-Both selector switches can fail from weak contact pressure due to the design, and that simple disconnect switches are more reliable.

50 Amp Battery Master Switch - Accessories, Battery Switches - Hella Marine

So my 1-2-Both switch has failed after 14 years. Another switch lasting 14 years should take care of me , but my sons may well want to keep the boat in the family .

[ggray]

Sorry for the premature posting!

So I thought I'd look into separate positive contact disconnects for each battery.

The question is, has anyone used this type switch and which did you install? The Hella switch is rated for 50 amps which I think is insufficient. I found one on the O'Reilly autoparts site made by BWD rated at 175 amps continuous, but wonder if it really is any better.

[sailorboy1]

What size wire does your switch have? The switch and wire rating should match, and more important overcurrent protect should be sized for the smallest rated item.

But I would just replace with switch with the same type it had. If you start over doing stuff it never ends.

[DeepFrz]

Blue Sea has some nice, expensive remote switches.

[ggray]

The cable is spec'd to be 70 (mm squared I believe).

And I know, replacing with the same would be the easy solution.

Originally Posted by sailorboy1

What size wire does your switch have? The switch and wire rating should match, and more important overcurrent protect should be sized for the smallest rated item.

But I would just replace with switch with the same type it had. If you start over doing stuff it never ends.

[ggray]

I've looked at some Blue Sea switches, but not remote!

Originally Posted by DeepFrz

Blue Sea has some nice, expensive remote switches.

[mitiempo]

70mm square wire is close to 2/0 so a 50 amp switch capability is very insufficient. Blue Seas manual battery switches - even the smaller ones like the 6006 or 6007 are rated at 300 amps continuous and very reliable.
m-Series Mini On-Off Battery Switch with Knob - Red - Blue Sea Systems

[ggray]

Thanks. I'm looking at that one.

[Colin A]

Cole Hersee makes some decent battery disconnects as well plus they rate them as marine. The higher amp ones are not all that cheap thou.

[ggray]

Actually, that's what I had, and what has failed.

But since I'm trying to resolve battery issues--maybe caused or exacerbated by the defective switch??-- I'm going back with the same.

Perhaps I'll do something different in the future, when I have more time.

Originally Posted by Colin A

Cole Hersee makes some decent battery disconnects as well plus they rate them as marine. The higher amp ones are not all that cheap thou.

[Colin A]

Yeah they have battery switches but they also have switch type disconnects
Battery-Related Products | Battery Selector/Master Disconnect Switches75920-05 | Cole Hersee - Littelfuse
Battery-Related Products | Master Disconnect Switches | Cole Hersee - Littelfuse
Or you could go all European with some Albrights
Curtis/Albright and Albright Battery and Emergency Disconnect Switches

[ggray]

Those are some nice looking switches.

Originally Posted by Colin A

Yeah they have battery switches but they also have switch type disconnects
Battery-Related Products | Battery Selector/Master Disconnect Switches75920-05 | Cole Hersee - Littelfuse
Battery-Related Products | Master Disconnect Switches | Cole Hersee - Littelfuse
Or you could go all European with some Albrights
Curtis/Albright and Albright Battery and Emergency Disconnect Switches

[btrayfors]

I suspect you may be referring to the old Cole Hersee 705, or similar one. These are now discontinued, but are available new at deeply discounted prices, viz...

Cole Hersee Battery Switch (Old M705) COL-M750, Electrical

Bill

[mitiempo]

We sell both Cole Hersee and Bep in Victoria at Trotac Marine. But 100% of the battery switches we sell are Blue Seas. Haven't had one issue in the hundreds sold nor the ones I have installed.