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 Catalina 250 Specific Forum
 Bus Bar		  New Topic  Topic Locked
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jking
Navigator

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110 Posts
Initially Posted - 07/23/2009 :  22:05:02  Show Profile
Where is the bus bar (negative terminal) on the 250? I can't seem to locate mine, and it's not clearly stated in the manual.
John
250 WB #887
'Flying Wasp' , formerly 'MAD MOM'
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delliottg
Former Mainsheet C250 Tech Editor

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USA
4479 Posts
Response Posted - 07/23/2009 :  22:26:48  Show Profile  Visit delliottg's Homepage
John,
The breaker panel is on the starboard side of the boat just aft of the galley (you almost certainly already know this, but just in case). Inside the panel are two bus bars for positive, and tucked up a bit further inside the hull and a bit further aft (less than six inches) is a negative bar epoxy bonded to the inside of the hull. At least that's how our '97 is done, yours is a newer boat, but I'd imagine it's basically the same.
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KD4AO
Navigator

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USA
202 Posts
Response Posted - 07/24/2009 :  05:58:03  Show Profile
Same on an '03. Not very big, 5 or 6 inches maybe.
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Nautiduck
Master Marine Consultant

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USA
3704 Posts
Response Posted - 07/24/2009 :  07:22:01  Show Profile
Here it is:

Oh, I thought you wanted to know where the bar bus was!
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jking
Navigator

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110 Posts
Response Posted - 07/29/2009 :  18:45:06  Show Profile
Thanks for the replies. I looked in that location tonight, and can't find it (I do know what it looks like, thanks to the WM catalog). Looks like a call to Frank Butler may be in order!
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jking
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110 Posts
Response Posted - 07/29/2009 :  18:50:37  Show Profile
Thanks for the replies. I looked in that location tonight, and can't find it (I do know what it looks like, thanks to the WM catalog). Looks like a call to Frank Butler may be in order!
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bear
Admiral

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USA
909 Posts
Response Posted - 07/29/2009 :  19:24:54  Show Profile
John, If you have an owners manual it may have a schematic showing where your grounds are. If not call Catalina engineering, even with my 95 model they have helped and didn't care the boat was over 10 years old. I might also suggest tracing the ground wires routing on the negative battery terminal and see where they end up....
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Voyager
Master Marine Consultant

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USA
5368 Posts
Response Posted - 08/03/2009 :  20:04:31  Show Profile
I'd have second Bear's advice, follow the black wires back from the switch panel, lights, radio and the battery's negative terminal. The negative ground is never switched, so you will see all the ground-wire home-runs converging in one place - the bus bar.

And, of course, you'll see all the partiers converging on the bar bus! (thanks Randy!)

On my '85 C25, I had connection and voltage drop issues, so I entirely replaced the bus bars with industrial strength copper bus bars from a Square D 200 Amp commercial circuit breaker. I also installed heavier guage wire around the boat. No more voltage drops!
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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.