"Normal marine battery switches all provide make-before-break
connections [...]"

I did not know that.

--
Jack "Rocket j Squirrel" Elliott
1984 Westfalia, auto trans,
Bend, Ore.

On 09/20/2012 10:30 AM, David Beierl wrote:
> At 12:51 PM 9/20/2012, Rocket J Squirrel wrote:
>> Anyone know of a three position (1/2/off) battery switch?
>
> Try a Filnor A-2011 (bottom left on this page)
> http://www.filnor.com/html/products/knife-switch.php . With a cover over
> it, obviously. That's a 600 amp switch - there are probably smaller ones
> in the catalog.
>
> Normal marine battery switches all provide make-before-break connections
> because disconnecting the battery from a running alternator will spike
> the boat electrical system as the alternator suddenly unloads (they also
> typically have a field disconnect terminal that shuts off the alternator
> before the switch is rotated to OFF). So even if there were not a
> specific 1+2 position, it would still exist while switching.
>
> Yours,
> David