wire guage

If its 6 B & S its 6 gauge and you will need fuses like used in car stereo 5AG

Look here www.jaycar.com.au page170

Fuses on P 64 and holders on P 420

I have 6 B&S from car to van and it just fits in a 50 amp Anderson plug.

2 B & S is huge and costs $14.50 a metre

According to Jaycar 2G has a total dia of 12mm 6G 10mm 8G 6.5mm Outside dia including the insulation.

Take it to a sparky and ask would be the safest way.

The wire between the batteries on a 100ser Cruiser is either 2 or 3G so that may help

Hey dude....... i would cut off a small bit, say 2 inch's and take it down to a auto sparky shop and get ya fuse to match the cable size, he will ask you what it is for and what ya expect the fuse to do and handle so get that info sorted first.....
The link it's self dont work but not hard to work out but will not mean a great deal to most reading it as you have not fully explained what it is for and just a tad more details will help for answers, there is a HEAP of info of all sorts and far to much detail for the average bloke like me to understand and get around, best ya head down but again get some more info for the sparky dudes..
Cheers mate

Cheers fellas,
Just chopped a bit off, so may take this for a drive tomorrow, the local shops had bugger-all, and without knowing the cable size wasn't about to order anything in.
Now I keep thinking there is a bit of liqurice sitting on my desk :)

Count the number of strands in the cable...if around 455 (at 0.30mm dia) then it'll be 2B&S. If it has around 189 strands (.30mm dia each) then it'll be 6B&S......may depend on the cable type/flexability though.

Hope that helps.

Andrew

Here is a pic of the wire sizes

The left 2 are 6 B&S the small one is 8 B&S and the r/h one is 3 B&S

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Easiest way to tell is measure the thickness of a strand of copper with a good vernier, and count how many strands there are.
Cable cross section area is easy to compute using a spreadsheet. Remember the area of a circle (as the cross section of each strand will be) is pi * r squared. Multiple the area of one strand by the number of strands.
Or go to
http://redarc.com.au/products-and-services/sbi-series-dual-battery-isolator/cable-size-and-voltage-drop-calculators
And enter the details into "Set Cable size from strands". You can compare what you have against 6B&S on the same page.
Enjoy !
Peter.

If the diameter of stranded copper is 6.5mm, then you have 4 gauge cable.

This has a current rating of at least 105 amps so you can use any fuse or circuit breaker smaller than 105 amps close to the battery.

However if there are smaller cables connected in this run that are smaller than 6mm diameter, that do not have their own fuse at the connection with this cable, then you need to use a fuse smaller than the current rating of the thinnest cable.