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Old 21-01-2015, 08:34   #1
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Shore Power Breaker Amperage

Hi all. I have 2003 B 393 Oceanis clipper, 3 cabin version.
Shore power switch (Main 220) on the 220 V panel doesn't work and ı want to replace it.
I can't find how many amp is this switch?
Is there anybody know it???
Thanks
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Old 21-01-2015, 08:53   #2
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Re: Shore Power Breaker Amperage

If it is a power switch, there's probably not any that tolerate less than 25 A. They have to be able to tolerate a such high short circuit current.

If it is a fuse so it is probably 10 A. In a 230 V system it is seldom used any bigger.
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Old 21-01-2015, 08:59   #3
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Re: Shore Power Breaker Amperage

Size the fuse according to the safe amount of current that the wire gauge can carry. Fuses are sized to protect the wire.

For AC,
14 gauge, 15 amps
12 gauge, 20 amps
10 gauge, 30 amps
8 gauge, 50 amps

On your AC breaker there will be manufacturer/certification numbers and/or letters of some sort. Google those numbers.
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Old 21-01-2015, 09:19   #4
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Re: Shore Power Breaker Amperage

Thank you David and Lars.
I couldn't find it in owners manual and in web.
I have added the photo (The most bottom one) and the page in owners manual
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Old 21-01-2015, 09:42   #5
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Re: Shore Power Breaker Amperage

The owners manuals for boats are typically pretty worthless, that's if you get one at all. What is more important is to get all the manuals for all the equipment that was installed on your boat. Otherwise you can look up the PDF for that equipment on the internet. The panel on your boat looks custom to the boat manufacturer, so its doubtful there is a manual for it.

Have you looked at the gauge of the wire that leads to the breaker? Size the amperage of the breaker to the size of the wire leading to it.

Chances are good that if you unscrew that panel that you will see the amperage of the breaker on its backside. At the very least you will see the gauge of the wire leading to the breaker.

BTW, it's supposed to be a double pole breaker that shuts off both the Hot and the Neutral.
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Old 21-01-2015, 10:52   #6
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Re: Shore Power Breaker Amperage

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Originally Posted by Aorta View Post
Hi all. I have 2003 B 393 Oceanis clipper, 3 cabin version.
Shore power switch (Main 220) on the 220 V panel doesn't work and ı want to replace it.
I can't find how many amp is this switch?
Is there anybody know it???
Thanks

either 10 A @250 VAC or 16A @ 250VAC, it will not be bigger

It will be stamped on the reverse

replace it with a 16A switch if you can't determine rating

its not a circuit breaker from memory

dave
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Old 22-01-2015, 01:32   #7
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Re: Shore Power Breaker Amperage

Understood, I will check gauge of the wires.
David and Dave, thank you for your advice.....
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Old 22-01-2015, 05:11   #8
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Re: Shore Power Breaker Amperage

Greetings and welcome aboard the CF, Aorta.
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Old 22-01-2015, 07:48   #9
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Re: Shore Power Breaker Amperage

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Greetings and welcome aboard the CF, Aorta.
Thank you ......
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Old 22-01-2015, 10:40   #10
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Re: Shore Power Breaker Amperage

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Understood, I will check gauge of the wires.

David and Dave, thank you for your advice.....

Note , that is a switch not a breaker from memory ( I used to own a 393) , the gauge of the wire is not relevant , the Rating is the switch contact rating

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