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24 v main switch


Paul Osterberg
 

I'm in the process to install LiFePO4 cells, I like to tidy up among some of the wiring, install some fuses etc. Now to my question. From the 24 V main switch there are 5 cables.one thick black cable maybe +90 sqmm, I guess for the bowrhruster,. two red cables around 50 sqmm, assume one for windlass and one for the three electric furling  motors. Then there are two red maybe 16 sqmm, guess they are for rest Autopilot fridge and frezzers instrument etc. Attached a photo can anyone confirm my assumptions or give a better understanding which cable goes to where?
Paul on sykerpa SM 259 Lagos Portugal 


 

Utilize some Bus Bars. Be sure to label all of the wires
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CW Bill Rouse Amel Owners Yacht School
Address: 720 Winnie, Galveston Island, Texas 77550 
View My Training Calendar


On Sun, Oct 25, 2020 at 12:30 PM Paul Osterberg <osterberg.paul.l@...> wrote:
I'm in the process to install LiFePO4 cells, I like to tidy up among some of the wiring, install some fuses etc. Now to my question. From the 24 V main switch there are 5 cables.one thick black cable maybe +90 sqmm, I guess for the bowrhruster,. two red cables around 50 sqmm, assume one for windlass and one for the three electric furling  motors. Then there are two red maybe 16 sqmm, guess they are for rest Autopilot fridge and frezzers instrument etc. Attached a photo can anyone confirm my assumptions or give a better understanding which cable goes to where?
Paul on sykerpa SM 259 Lagos Portugal 


Paul Osterberg
 

Bill, Yes that's the plan, to label, bus bar and fuses
Paul


Jose Venegas
 

Bill, 
I noted that, in IPANEMA, the cables from the battery chargers connect to the battery side of the main switch.  In other words, they are still hot after turning the main switches OFF. : Is this the way it should be?  It is OK if one knows but very important when installing new chargers or fiddling around with the alternator!!.  For that, I had to disconnect the battery output from the main bus.
I will add the bus bar if I have to add/modify anything on my system.

Jose
Ipanema SM2K 278


Chris Doucette
 

It is indeed the way it is..  also the same for the 110v inverter.  I, in upgrading to my Lipo / Victron added fuses and a switch for the charging devices and the inverter.


On Oct 26, 2020, at 7:28 PM, Jose Venegas via groups.io <josegvenegas@...> wrote:

Bill, 
I noted that, in IPANEMA, the cables from the battery chargers connect to the battery side of the main switch.  In other words, they are still hot after turning the main switches OFF. : Is this the way it should be?  It is OK if one knows but very important when installing new chargers or fiddling around with the alternator!!.  For that, I had to disconnect the battery output from the main bus.
I will add the bus bar if I have to add/modify anything on my system.

Jose
Ipanema SM2K 278


 

Jose,

Should be? According to who? 😀

I believe that Amel has connected the chargers to the battery side of the main switches for some time. I know that at least some Amel 54 switches were wired with the 24v Alternator on the load side. 

I will let a marine electrician answer the "should" question, but I believe that you could have a problem if the chargers were wired to the load side and you had shore power ON, Charger ON, and the Main Switches OFF. Again, I will leave the last word to a marine electrician.

I have attempted to illustrate a typical battery switch.  Any help with improvements in the illustration below will be appreciated. Note, I said "typical." The negative main switch should basically have the same connections at the same poles.
image.png

CW Bill Rouse Amel Owners Yacht School
Address: 720 Winnie, Galveston Island, Texas 77550 
View My Training Calendar


On Mon, Oct 26, 2020 at 6:28 PM Jose Venegas via groups.io <josegvenegas=icloud.com@groups.io> wrote:
Bill, 
I noted that, in IPANEMA, the cables from the battery chargers connect to the battery side of the main switch.  In other words, they are still hot after turning the main switches OFF. : Is this the way it should be?  It is OK if one knows but very important when installing new chargers or fiddling around with the alternator!!.  For that, I had to disconnect the battery output from the main bus.
I will add the bus bar if I have to add/modify anything on my system.

Jose
Ipanema SM2K 278


Randall Walker
 

This is the correct way to do charging units. I will attach a link to some of the most informative info on the web.

Virus-free. www.avg.com


On Tue, Oct 27, 2020 at 12:28 AM Jose Venegas via groups.io <josegvenegas=icloud.com@groups.io> wrote:
Bill, 
I noted that, in IPANEMA, the cables from the battery chargers connect to the battery side of the main switch.  In other words, they are still hot after turning the main switches OFF. : Is this the way it should be?  It is OK if one knows but very important when installing new chargers or fiddling around with the alternator!!.  For that, I had to disconnect the battery output from the main bus.
I will add the bus bar if I have to add/modify anything on my system.

Jose
Ipanema SM2K 278