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 Catalina 250 Specific Forum
 Battery upgrade and wire sizing		  New Topic  Topic Locked
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WindDancer
1st Mate

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USA
34 Posts
Initially Posted - 10/08/2010 :  22:00:50  Show Profile
Hello everyone,

Its been quite a time since I have done any post, but I have been following all of your valuable posts and information.

I would like your opinions on moving my batteries to the forward bunk (two wet cell group 27 batteries). I’m installing a battery switch to help manage the two batteries. I have totaled up my planned future amp loads and wire runs acaccording to books recommended on this site. But because of the amp loads and run length the standard formulas require me to use 2/0 cable mainly because of the starter draw on the Nissan 9.8 outboard. On the starter it is marked at .5 kwatts at 12 volts which equal 41 amps with a 20 amp fuse (in the motor). I have a 60 foot total run from the battery to the switch to the main panel and back.

So my question is do I still count total amps or is there a factor to use so that I can go a size or too smaller because not all of the amps will be used at the same time i.e. anchor lights on while running lights are on with CD player on with TV on with GPS and starter engaged etc. What size wire are you using from the battery to the panel and what size fuses/fuse block are you using at the battery? 2/0 wire is pricey. Any recommendations as to places to purchase the wire? I am going to remeasure my run to see if I can shorten the distance.

Thank you for your input

Bruce
2006 250 WB #861
Bruce and Suzette
Five O' Clock Somewhere
2006 C250WB #861
Clearlake Ca
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.