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Old 25-05-2024, 19:50   #1
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AC entirely separated from DC can it still stray

Forgive me for starting a new thread but there seems to be so many AC/DC threads that it will take me too long to sieve out what Iím after.

I have a glass boat, reasonably new to me. When I purchased it, it had a single AC power point connected to a shore power socket.. I suspect the previous owner plugged an extension into it to then run some kitchen appliances.

Iíve now added a few more sockets and an inverter so I have some basic AC on the hook. The system is completely isolated from the DC, except when using the inverter I guess, then itís connected to the batteries of course.

I can disconnect the inverter and plug in a shore power lead if at a marina. But I canít do both.

My question is, many (Facebook) seem to insist that the Ďearthí (green) should be connected to Ďgroundí on the boat and quote the ABYC rules on it.

Is there an Australian perspective to this?
Is my system safe if itís two entirely separated systems?

Regards.
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Old 25-05-2024, 22:14   #2
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Re: AC entirely separated from DC can it still stray

From what you've described of the 240v works you've carried out you'll need to have the work checked and certified by licensed electrician or accredited marine surveyor.

Click here to review the relevant Oz Maritime
Safety Authority web site detailing the requirements.
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Old 25-05-2024, 23:22   #3
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Re: AC entirely separated from DC can it still stray

If you have hooked the chassis ground of the inverter to the dc. Ground as required. You have Likly already joined the ac to dc ground via that cable.
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Old 26-05-2024, 02:17   #4
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Re: AC entirely separated from DC can it still stray

Quote:
Originally Posted by grantmc View Post
From what you've described of the 240v works you've carried out you'll need to have the work checked and certified by licensed electrician or accredited marine surveyor.

Click here to review the relevant Oz Maritime
Safety Authority web site detailing the requirements.
Yep, I have an RCD on the AC circuit.
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Old 26-05-2024, 02:20   #5
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Re: AC entirely separated from DC can it still stray

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Originally Posted by smac999 View Post
If you have hooked the chassis ground of the inverter to the dc. Ground as required. You have Likly already joined the ac to dc ground via that cable.
The inverter has a positive (red) to battery and negative ( black) to battery. Where it obtains its power from. However, I canít see how that is connecting the AC power side to DC. ?
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