Anodes for seacock, grounding plate

[Dmitry R.]

Hi!

I have two seacocks in my boat (24 feet). Photo is below.

There is no any wire going to seacocks.
Boat is used 20 per cent in salt water and 80 per cent in fresh water.
Do I need to change these seacocks for another, made of bronze?
Should I connect both seacocks to an anode? Will this anode do the job:
https://www.osculati.com/en/11458-m-...tus-type-anode

I have AC invertor in my boat, but there is no grounding plate. Do I need to have grounding on my boat if I use AC current?
Should I make grounding, for instance, with such plate:
https://www.osculati.com/en/11596-29...ard-mass-plate

One more question, if I will connect seacocks to anodes and AC invertor to a grounding plate, the both plates will fit onto transom. Space is enough, that wouldn't be a problem. Both plates will be close to each other. Can I connect grounding wire to a zink anode? So that I will have only one plate, made of zink (or zink plus aluminium).
Picture of the seacock on my boat is here (sorry, I couldn't insert the picture into the message, still need to be trained how to do it): Seacock
New photo by Dmitry R.

 

[Keith-i]

I don't know about grounding plates for inverters but my understanding is that it is good practice to bond your seacocks to an anode although this can bring its own problems of electrolysis. If they are good quality bronze though there is an argument they don't need bonding.

 

[Bajansailor]

Just 'bumping your post up' again, as it was about to 'fall off' the first page.

Are your two seacocks made of brass? Do you know who the manufacturer of the seacocks is?

Do you have any existing zinc anodes on your boat - for example on the propulsion unit?
Does she have a shaft drive, outdrive leg or an outboard motor?
(or even maybe a water jet unit?)

Re grounding your inverter, here is a good explanation -
Grounding Inverter/Chargers on Boats

Do you keep the boat in a marina or is she stored ashore?
If she is afloat all the time, do you keep her connected to shore power when you are moored?

 

[Dmitry R.]

Thanks for the answers!
My seacocks are made of nickeled brass and seems to be a hosehold thing. I have zink anodes - only standard on my Yamaha 300 outboard. I keep boat in a marina five-six months a year, 20 per cent in salt water, 80 per cent in fresh water. Yes, I do have shore power but connect it not really often, say 5-10 days a year my boat is connected to shorepower for recharge of batteries.
Also, I have an AIS and Standard Horizon radio. I have heard, that it is important to have ground for these devices.