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Old 12 November 2013, 13:37   #1
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Earthing in rib

I am in process of rewiring my rib can some one tell me how they go about earthing their 12volt system? I was going to run an earth from neg terminal Of battery to a threaded bolt in the grp somewhere dry and out the way.
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Old 12 November 2013, 13:43   #2
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That will do. You can get bus bars. They make it look tidy. You can get fuse boards with bus bars in them. You are on the right track though
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Old 12 November 2013, 13:50   #3
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Yeah I'm only running lights, bilge pump and maybe 12v charger.

I'm going to use the blue sea systems fuse box with bus bars. Was going to use breakers but think it'll be okay on fuses as it's only 3 basic supplies.
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Old 12 November 2013, 13:51   #4
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That will do. You can get bus bars. They make it look tidy. You can get fuse boards with bus bars in them. You are on the right track though
+1 keep the wiring tidy and don't add any joints into loom where you can't get at them in the future, they will always be the ones that give you the problems
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Old 12 November 2013, 14:38   #5
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Forgive the naive, but why do you need an earth on a 12V plastic boat? Is it to prevent corrosion due to creation of an anode in a +ve to outboard casing short? (only reason I could conceive)

Many thanks
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Old 12 November 2013, 14:43   #6
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Forgive the naive, but why do you need an earth on a 12V plastic boat? Is it to prevent corrosion due to creation of an anode in a +ve to outboard casing short? (only reason I could conceive)

Many thanks
He is looking for a common earth to be used by several electrical items
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Old 12 November 2013, 14:51   #7
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Forgive the naive, but why do you need an earth on a 12V plastic boat? Is it to prevent corrosion due to creation of an anode in a +ve to outboard casing short? (only reason I could conceive) Many thanks
If you have to ask never do any wiring on a boat
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Old 12 November 2013, 14:54   #8
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Thanks A1an
Is it common practice to Earth 12V systems in RIBs? I'm a little confused as 12V equipment has it's negative already tied to metal casings, unless its a double insulated plastic case where earth is not needed. The negative terminal is already earthing the case. Why is an extra one required. Am I missing something?
Sorry to sound lost ... Fizz
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Old 12 November 2013, 14:55   #9
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Technically its not an Earth, it's the 12v -ve, not to be confused with a true earth, for shore power.
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Old 12 November 2013, 15:02   #10
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If you have to ask never do any wiring on a boat
Red to red, black to black. Plug it in and stand well back!
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