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jayaway44



Member Since: 04 Nov 2011
Location: Edinburgh
Posts: 111

2012 Defender 110 Puma 2.2 USW Stornoway Grey
Battery wire size
Can someone please tell me what gauge of wire is used for the negative feed on a TDCi. I would like to change the connector on the negative terminal as it has the silliest of connections on there that means I cannot add another cable onto the terminal. I am not at home at the moment or I would just go out and measure it but i would like to get the materials ordered so it is sitting waiting for me to install when I get home.
Looking at the connection it looks like i will just have to chop the old one off and put on a crimp with an 8mm hole for the new terminal I shall fit, that is unless somebody has a better idea.

Thanks 2.2 2012 110 utility Orkney Grey
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Post #212214 18th Feb 2013 7:18pm
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ethanicus



Member Since: 11 Jan 2013
Location: Surrey
Posts: 94

2014 Defender 90 Puma 2.2 XS CSW Corris Grey
I also had this issue when I wanted to add a Blue Sea Aux fuse box. I didn’t want to cut the terminal, but if you did I believe a 35mm2 terminal is required.

In the end I removed the current T style bolt and replaced with a longer ss bolt (m6 from memory). I simply ground down the head to match the existing bolt. Refitted as normal then used a spring washer and nut to secure a M6\16mm2 terminal as per below.

Hope that helps?


Click image to enlarge
Post #212245 18th Feb 2013 8:58pm
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 8006

 2011 Defender 110 Puma 2.4 USW Stornoway Grey
35mm is std i believe Cheers

James
110 2012 XS Utility
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Post #212247 18th Feb 2013 9:03pm
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jayaway44



Member Since: 04 Nov 2011
Location: Edinburgh
Posts: 111

2012 Defender 110 Puma 2.2 USW Stornoway Grey
Thanks guys, is the 35mm you are quoting the terminal size or the cable size, is the cable 25mm, 35mm or 40-50mm. Thanks for the picture I can't quite imagine it at the moment and will need to look at the battery when I get home.
Thanks gain. 2.2 2012 110 utility Orkney Grey
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Post #212288 18th Feb 2013 11:59pm
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christyler



Member Since: 10 Dec 2010
Location: Cork, Ireland
Posts: 67

battery cable
the general rule of thumb with winches/ battery cables etc is the thicker the better, thicker cable gives less voltage drop over a given length when drawing heavy current through it.

i use 50mm2 cable for all things battery/winch related.
Post #212289 19th Feb 2013 12:10am
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jayaway44



Member Since: 04 Nov 2011
Location: Edinburgh
Posts: 111

2012 Defender 110 Puma 2.2 USW Stornoway Grey
If going to a 12 way fuse board do you need to fuse it down on the way? 2.2 2012 110 utility Orkney Grey
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Range Rover Evoque - Surprising but I like it.
Previous
Freelander 2 SD4 HSE - Black
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Post #212292 19th Feb 2013 7:06am
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Go Beyond



Member Since: 30 Jan 2012
Location: Headcorn, Kent
Posts: 6678

United Kingdom 
The battery earth cable size is 35mm - buy a terminal for a 35mm cable

You don't fuse earth cables only live

There is a mega fuse already fitted in the live / positive cable

Hope that helps
Post #212296 19th Feb 2013 7:28am
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MartinK



Member Since: 02 Mar 2011
Location: Silverdale (Lancashire/Cumbria Border)
Posts: 2665

United Kingdom 2011 Defender 110 Puma 2.4 USW Orkney Grey
I have a similar query...I'll post it in case it helps...or maybe someone will tell me the error in my plan Question

Following the negative line from the battery, it leaves the seat box at the trasmission tunnel, then splits under the chassis member. One part goes onto a M8 bolt on the chassis, and the other (thicker) end goes onto the back of the gearbox (from memory).

Rather than make a change in the battery box (warranty concerns), I was going to crimp (and insulate) a 8.4mm Ring Terminal onto the chassis earthing point, and run a 27 amp cable back into the seat box...

On the positive side there's a spare point on the battery lead connector anyway (it's just the earth/neutral that doesn't have a spare easily-accessible connection).

Would my plan be OK? Defender "Puma" 2.4 110 County Utility (possibly the last of the 2.4's)
Post #212314 19th Feb 2013 8:25am
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Go Beyond



Member Since: 30 Jan 2012
Location: Headcorn, Kent
Posts: 6678

United Kingdom 
Yes, no problem
Post #212315 19th Feb 2013 8:28am
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MartinK



Member Since: 02 Mar 2011
Location: Silverdale (Lancashire/Cumbria Border)
Posts: 2665

United Kingdom 2011 Defender 110 Puma 2.4 USW Orkney Grey
Go Beyond wrote:
Yes, no problem


Great thanks for the help Thumbs Up Defender "Puma" 2.4 110 County Utility (possibly the last of the 2.4's)
Post #212317 19th Feb 2013 9:01am
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