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Wire thickness question?

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adriaand

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Hi

I know thickness of wire to use in household appliances but what thickness do I use for a 12v7aH battery or does the thickness not matter on dc?
 
It depends on a few things:
1. What fuse you intend to protect the system with?
2. How far away the load is?
3. How much voltage drop can the load tolerate? (3 to 5% is a good number)
 
Its for a model boat. So max lenght is about 30cm. No fuse. I don't want to drop to much voltage. Will 1mm wire be to thick?
 
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