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Old 06 March 2019, 15:40   #11
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I used 25mm cable for both of my acr relay to batteries and again for my lead running to the console.

I used bep maxi fuse holders for all and 80amp maxi fuses. Well big enough and perhaps overkill.
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Old 06 March 2019, 16:03   #12
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Thanks, thatís interesting, will look at those fuse holders.

This is what I was thinking ...

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Old 06 March 2019, 16:16   #13
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I donít really see the point in putting in place two distribution posts. If you have enough 25mm cable left just run it all the way to the console and before it gets into your fuse board, place a maxi fuse holder.

Job done.
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Old 06 March 2019, 16:18   #14
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Quote:
Originally Posted by Chanchan168 View Post
I donít really see the point in putting in place two distribution posts. If you have enough 25mm cable left just run it all the way to the console and before it gets into your fuse board, place a maxi fuse holder.



Job done.


Yes I suppose using the maxi fuse holder you used it does away with the in line fuse and the need to use distribution posts to connect up the different cables ...
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Old 06 March 2019, 16:21   #15
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Saves you a lot of bother and you can put your fuse at either end. Mine is in console just before fuse box. Nice and simple and easy to maintain.

Best of luck and post pics
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Old 06 March 2019, 16:28   #16
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Quote:
Originally Posted by Chanchan168 View Post
Saves you a lot of bother and you can put your fuse at either end. Mine is in console just before fuse box. Nice and simple and easy to maintain.



Best of luck and post pics


Thanks, will do
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Old 06 March 2019, 16:29   #17
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If you need anymore help or assistance, just ask. Plenty on here with a lot more knowledge than me.
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Old 07 March 2019, 01:24   #18
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RIBase
+1 on what Chanchan is saying with the exception that I'd put the fuse as close to the battery as possible.

It looks like you have drawn a distribution post with one large incoming cable and then several outgoing cables. You could do it this way with a number of inline fuses but it would possibly be neater to terminate it at a fuse box. The link below is to a Blue Sea one but there are various different options.

https://www.bluesea.com/products/503...h_Negative_Bus

The key thing to remember is that the fuse protects the cable rather than the equipment but it is normal to size the fuse based on the maximum current draw of the equipment.

If your total current draw is 16A, for example and your cable is rated at 100A, then the main fuse can be somewhere between 16A and 100A. If you use 1.5mm cable between the fuse box and the consumer e.g. nav lights, then the fuse should be somewhere between the rating of the cable (20A) and the draw of the lights (2A). I'd suggest using 5A fuses for everything apart from your VHF and bilge pump where I'd use 10A.

https://www.12voltplanet.co.uk/maxi-blade-fuses.html
https://www.12voltplanet.co.uk/inlin...se-holder.html

Unfortunately, for you, using 25mm cable would force you to use mega-blade fuse holders or similar as they aren't built to deal with cable over 16mm. There's nothing wrong in that but bigger cable tends to give you fewer termination options.

Apologies for the over long e-mail and if I've confused you even further. I'd also like to add that I'm not an electrician but I've done a couple of 12V projects - motorhome and RIB.
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Old 07 March 2019, 04:42   #19
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Agreed with Guy. As I ran new cable throughout the refit, I used 25mm all the way from the isolator to my bluesea fuse block (same one as guy suggests)

That has a 6mm lug on it and it’s easy to get a 25mm copper tube terminal with a 6mm hole. I used bep maxi fuse holders. If I remember, these also have a 6mm screw down lug. They only cost £17 each and can take up to a 80amp maxi blade fuse. This was placed close to the fuse block just to aid replacement but as guy says, can also be placed close to battery.

https://boatelectricals.co.uk/bep-ma...older-702-mfh/
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Old 07 March 2019, 16:48   #20
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Thanks both, parts ordered, will post photos once all connected up
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