Re: [Amel Yacht Owners] Shore power plug questions.


Bill & Judy Rouse <yahoogroups@...>
 

Thanks, Olivier!

Bill Rouse
BeBe Amel 53 #387
Sent from my tablet
+1832-380-4970 USA Voice Mail


On Aug 18, 2016 7:38 AM, "Beaute Olivier atlanticyachtsurvey@... [amelyachtowners]" <amelyachtowners@...> wrote:
 

Hello Alexander,

the original shore power cable installed in your SM is a 3G2.5 HO7. This is a high quality cable (HO7), with 3 2.5sqmm wires, able to carry 16 amps, not more. If you connect it to a 32A, even a 63A dock outlet, and turn on ALL of your 230V equipments, it will get fire in a few seconds, without tripping the dock's breaker.
This cable can only carry 16 amps, and if you have no other option than connecting to a 32A or 63A dock outlet, you MUST monitor your draw, and wash your clothes AFTER the scuba tanks are full.
Alan is right, the 32A breaker in the galley is made to hold the higher genset amperage.

When you connect to shore power, the cable must be as short as possible and uncoiled. Don't use unnecessary extensions. I've seen boats with 40 metres shore power cable nicely coiled in the lazarette, as the dock outlet was 3 metres from stern. This is a very safe way to get fire in your boat. If you have no choice, first uncoil your cable and spread it on the dock.

Concerning the originally mounted 110V/230V, 6kW step-up transformer (cubic grey box in engine room, optionnal) those who have it probably noticed that the 110V shore cable was bigger (3G4), able to carry 25A. So don't take more than 25A out of it (which means 15A on the 220V side of this transformer).
This transformer is NOT equipped with a galvanic isolator, meaning the ground is common to 110V input and 220V output. The 110V shore cable MUST be connected to the dock's ground/earth.
If you want to be protected from stray currents coming from your neighbors through the ground/earth wire, you need to install a galvanic isolator on the 110V input line.
Now some new products include a galvanic isolator, that's why they're called "isolation transformers".

Be careful with 220V but keep in mind that 12V or 24V could be even more dangerous (fire).

OLIVIER




On Thursday, August 18, 2016 1:02 PM, "Alexandre Uster von Baar uster@... [amelyachtowners]" <amelyachtowners@yahoogroups.com> wrote:


 
Good morning Eric, Alan,

I am not concerned about tripping a 16 Amp dock breaker.

I am concerned about my shore power cable being too small to pull for example 25 Amp out of a 32 Amp dock outlet.

Example, in 50 hertz countries if I use my Scuba compressor and my washing machine, plus some outlet, I will draw 25 Amps (5600 Watt) (this is what I measured with the Blue Sea last week while I was using my genset).

So if the shore power cable is only able to sustain 16 Amp, I am 50% above and don’t want to have an overheating and possibly get it on fire.

Going through your reply Alan, so if I understand correctly, you say the “shore power cable” coming from the boat is ok for 32 Amp. But the small extension I have is not, so I just need to replace that (with a thicker cable)?

Thanks for all of your reply.
Sincerely, Alexandre

--------------------------------------------
On Wed, 8/17/16, divanz620@... [amelyachtowners] <amelyachtowners@yahoogroups.com> wrote:

Subject: Re: [Amel Yacht Owners] Shore power plug questions.
To: amelyachtowners@yahoogroups.com
Date: Wednesday, August 17, 2016, 6:25 PM


 









That's true but if you try to draw 30A from a
dock outlet that is only rated to 16A, you will trip the
breaker on the dock..If you run too many 220V items at the
same time you can easily exceed 16A.....I know, I've
done it !
CheersAlanElyse
SM437 Noumea









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