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Discussion Topic: Electric's installation
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ADI |
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This winter I am installing shore power and have a few questions regarding wiring etc
1. do I need a galvanic isolator? I have no anodes and am not planning lifting the boat in the near future.
2.am I right thinking I need 1 ring main for all the sockets (probably 5 or 6 doubles), a separate supply for the battery charger and a separate supply for the immersion heater?
Regards
Adrian Michelle
Beck Braydon and Mere.
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annville |
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Hi Adrian a galvanic isolator is best they aren't expensive a 4 way mbc fuze box with a rcd s minimum this will give you 1 for charger, 1 for immersion heater, and 1 for inverta, should you add one later and 1 for ring main personally i would go for 6 way box not much more you don't need a house compatible box a garage/shed one is best they are plastic and cheaper house ones now have to be metal not good on a boat, by going for 6 way you can split the sockets in half and still have a spare, this may also save on wiring.in case you don't know you must use arctic cable blue and preferably 2'5 and clip/support every 12"and use ducting in engine bay,and it must not go in bilges, the channel type that the top pulls of is best,and you can get it in red, plastic Hep2-0 water pipe is also easy to use and cheaper if you have to run under floor boards, i would use ducting everywhere possible, belt and braces, and makes a professional looking job. John
This message was edited by annville on Sep-22-20 @ 10:08 AM
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ADI |
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Thanks John just what I wanted to hear, I wasn't aware I had to use artic blue, thanks for that.
I've not looked into inverters but didn't realise they needed to be wired up to the mains!
The only thing I am slightly unsure about is how to wire the galvanic isolator does it have a earth wire that has to be connected different parts of the boats running gear? might be wrong on that but I guess I will learn more when I purchase one.
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Adrian Michelle
Beck Braydon and Mere.
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ADI |
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Does something like this look ok?
galvaniv isolator
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Adrian Michelle
Beck Braydon and Mere.
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Keif'smate |
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I've not looked into inverters but didn't realise they needed to be wired up to the mains!
ADI, the job of an inverter is to produce 230V ac from a 12 or 24v battery.
The inverter is connected to the battery and the 230v ac output is usually in the form of a 13A socket outlet.
Make up a lead comprising of a 13A plug sufficient cable to reach the shore power inlet and use a BS EN 60309 (Commando) Blue socket at the other end of the cable. When shore power is not available, use the inverter and lead to provide a 230v ac supply to your installation.
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Luise |
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I’ve always fitted my GRP boats without anodes, with a Sterling Galvanic Isolator - a simple addition to the earth wire of the shore-fed AC input; never any galvanic problems but of course no objective proof of its effectiveness.
As for inverter, you should consider a combined inverter/charger: batteries kept fully charged and as much AC power as you need when connected to shore power (up to the capacity of your boat’s internal wiring, of course!), and a true sine wave inverter from your batteries.
Peter
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ADI |
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Thanks for the reply's more good info, I did understand how inverters work but was not aware they have to be wired to the fuse box as Anville said but I think I now understand,
The inverter is wired up to the battery's and powers up the sockets back through the fuse box, is this right or is there more to it? again if I ever bought one I suppose the instructions would make things clearer.
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Adrian Michelle
Beck Braydon and Mere.
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hedgehog |
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Just seen this today on a fb page for Viking cruisers
View Full Size Image
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ADI |
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it would be interesting to see the comment below the picture
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Adrian Michelle
Beck Braydon and Mere.
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annville |
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Hi Alde As Louise said a combined inverter/charger is best BUT! i personally use Sterling electrics well made and if it does need repairing they will do it while you wait if you take it to them before 10 o'clock there sales back up is excellent i have had problems with another well known firm, and of cause DONT buy cheap imports especially L E D's they catch fire. although there are favorable reports on the Russian heaters not sure how repairs go but both eberspacher and Webasto are very overpriced and have to buy complete assembles which makes repairs difficult. John
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Sep-21-2020 @ 8:20 PM
