bondage ????

[hairbox]

Hi everyone, that got your attention!!!

Can anyone out there give me any advice on the following please

My boat which is a Bavaria 40 year 2001 has had a hull anode bonding system fitted from new by the previous owner. This was installed by the boatyard as it was included in the extra's price list, it comprises of a pear shaped zinc anode attatched to the hull which is then connected to the gearbox and all the skin fittings.

When I said all the skin fittings were connected this is not quite true as the two sink drain skin fittings in the galley are not connected.


Questions

1) Any reason why the skin fittings in the galley are not connected as they are made of the same material etc ?

2) Is it bad practice to connect to the gearbox, as in the volvo handbook it states that the engine/gearbox should never be connected, any reasons as to why this has been done .


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[GrahamSC]

Hi
Galley skin fittings are not usually electrically connected and are normally ok without the bonding,. my bonding to the anode is onto the engine block and also to the sterntube, its the shaft and the prop that you are trying to protect, and it might be that there are plastic components in drive train that effectivley breaks the circuit. If the anode is still shiny and new looking, you may have a problen
Just a thought, but you do need anodest to be connected properly and checked for electrical continuity
grahamsc




<hr width=100% size=1>Never recovered from loss of Tot, 1974

 

[robind]

Dont you usually only bond the items that are submerged in the same electrolyte ( ie salt water in this case) the sink outlets would be above the water line possibly?.

Regards

Rob

<hr width=100% size=1><A target="_blank" HREF=http://www.rejuvanu.com>RejuVanu</A>

 

[GrahamSC]

Hi
You can if you wish, but the main factor is the fact that the engine block is negativley earthed to the battery, thus completing all the electrical circuits in the boat. Stray currents due to poor insulation without an anode, would soon turn the prop into junk. Damp in deck sockets is a common source of low insulation. The single galley seacock is in my case, in a GRP hull, with a plastic pipe to the sink so it is really isolated from the boats electrics.
GrahamSC

<hr width=100% size=1>Never recovered from loss of Tot, 1974