Leisure Battery Size?? (1 Viewer)

Doddy999

Free Member
May 3, 2010
159
14
Exeter Devon
Funster No
11,379
MH
C Class
Exp
8/5/2010
Have finally got myself my 2 x 100amp batteries fitted into my new locker
all ready to be connected.
Now the original battery was a 85amp under the drivers seat which I have disconnected, but!!! the cable is only 4/5mm thick?
Is this correct? or do I need heavier which means me having to run all new
cable to the charger??
Going away Monday so advice would be more than welcome. :winky:

Regards Doddy :Smile:
 

aba

Free Member
Oct 27, 2009
2,775
1,112
yorkshire
Funster No
9,066
MH
coachbuilt
Exp
dec 2009
i would think that it should be fine bearing in mind that it would be rated for the appliance draw from the battery also there will probably be a tiny strand of a fuse on the end of it.
i would use as thick as possible to connect the 2 batteries together and just slightly bigger than what is already there to link to the under seat location.
remember to fuse both ends of the battery + links as if there is a problem with one end the other is still live:thumb::thumb:
this is how i would do it there may be a professional along with a different view though.



andy
 

scotjimland

LIFE MEMBER
Jul 25, 2007
2,091
9,063
Suffolk Coastal District, UK
Funster No
15
MH
Timberland
It's important to have the correct size cable not only to carry the load, but to minimise volt drop..
The cable you have may be ample for the load but over a longer distance the volt drop will be greater, this will reduce the charging voltage.

To calculate the cable size you need to consider both current and cable length ..

An Example

1. Max current in Amps = 25
2. Cable length 5 mt
3. system voltage 12v

Cable size required as calculated fromLink Removed

Cable size (sq.mm):25.00.
Actual voltage drop over 5 mtrs. = 0.22


Use the calculator or post your cable length and max current and I will do it for you
 
May 16, 2010
3,213
2,535
North Hykeham
Funster No
11,622
MH
Custom
Exp
much more now
I do have to say that 4/5mm cable seems rather thin to me...Its like the cheap cable you get for jumping cars.....we used to call it "glow in the dark" because it used to get so hot when carrying a good amperidge

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Doddy999

Doddy999

Free Member
May 3, 2010
159
14
Exeter Devon
Funster No
11,379
MH
C Class
Exp
8/5/2010
Well got it all up running::bigsmile: feels better when you do it yourself, done all new wiring & cable tied new cable along to central locker.
Although all is running well, the batteries had stood for a while so when I started
engine up my meter rose up to 13.9 vol.
The original fuse used on battery was Green 30A, so have fitted 2 x inline 30A
is this correct rating?? Seems high???

Thanks again for all your help. :Smile:
 

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