Відео

We’ve not got a boat, it’s the science that’s interesting.

3:24

A very late comment, fault current is not sent to ground, fault current like all current is simply trying to get back to the power source. It does this via the safety ground as this is what it is provided to do. The safety ground wire is actually connected to the neutral at the power source. Which in this case will be the nearest shore power transformer. Whether in the marina or up on a power pole nearby. This ensures the safe conduct of the fault current to the source. It also provides the means to trip a GFCI on the incoming hot and neutral wires by creating an imbalance of the current measurement between those two same wires. If you bond the shore current safety ground to the battery negative (call it the engine block if you want but this is just a path in the negative path of DC current of the boat.) You then risk putting AC fault current into the water at the marina. This current will try this path if there is also a fault at the shore power connection. The only reason to ground the AC safety ground to the boat DC negative is if you have an isolation transformer installed. In which case the boat AC safety ground is not connected to the shore safety ground.

This is a great video, thank you. -Handyman

This video is not for the US market where boat builders conform to ABYC electrical specifications. Also, modern galvanic isolators are 'fail safe' and do not require an external monitoring system as shown in this video. Do not buy a galvanic isolator that is not engineered as 'fail safe'.

A diode

Underrated video. Very clearly illustrated. Thanks.

Is there a version for USA, 120 v

Not sure I would be happy having the inner cables/phases carrying 240v just tacked to a wall. A junction box might be a safer installation to hide the inner cables.

I visited your site. You several different sizes. Which isolator will I need? Thanks you. Steve

Best video explaining galvanic corrosion yet, Thanks

As someone who doesn't own a boat I'd never thought about this as a problem but it's quite interesting using the forward volt drop of a diode to block cathodic voltages like this. I could just do with some 5 million amp diodes to bond my underground copper earthing strips to the to my aluminium surface conductors to prevent galvanic corrosion.Kind Regards . . Andy

Awesome explanation. Cheers.

I have no idea what I just watched. Useless. How do you install? How does it connect? Where?

I am sure you'll learn how to make it if you'll read INPLIX HANDBOOKS from cover to cover :)

It was all going so well right up until your explanation of the isolator you said "so how does it work" and then proceeded to tell us what it does not how it works .

The 240 volt ac earth is always run back to shore . Normal practice and our recommendation for safe practice is to bond the a.c. earth (ground) to engine block or metal hull to ensure maximum protection onboard. This is usually done by running a 6mm earth bond from the 240 volt a.c. consumer unit earth buss bar to either the engine block (on grp boats) or directly to a clean contact point on the hull in the case of metal hull vessel.

Think the 240v ac circuit earth should be run back to shore. On the diagram it seems to suggest that it is also connected to the to the boats ground circuit. Do you mean the hull or just the 240v appliances?

All you need to do is insert the Isolator in the GROUND line, which is usually also in the US green, as shown in the video.

Good video. Thank you.

In the U.S. we do not have cable with those color codes, can you correct the colors for readers in the U.S.?

Sorry I am unable to retreive your full email : Please resend directly to me : safeshore.marine@virgin.net. & I will be pleased to help , Kind regards & thank you for your comment. Vic ..Safeshore UK

very helpful thanks for making the video!

Very clear and useful explanation... I did not know the boat to boat corrosion.Thank you so much.

great demonstration of sacraficial anodes & galvanic corrosion. very NOBLE of you to help others! pardon the pun.

This is a very well done video guide teaching about galvanic corrosion.