12v outlet ring main

[bromleybysea]

I have a number of 12v outlets around the boat and am planning to rewire in the spring. At the moment they are on spurs. Is it good 12v practice to put them on a ring main similar to domestic 240v wiring?

 

[Gordonmc]

I am in the process of doing a complete AC and DC rewire.
Both the 12v and shore power had eight outlets in the four "cabins" including the galley which, to my mind is way over the top. In the end I will have four AC and only two DC outlets in series, not spurs.
The thinking is that doing it in series will be more cable efficient. The downside if a fault does occur it will take down the entire circuit and will be more difficult to trace. Its a compromise.
The AC is being replaced 'cos its fittings are for 110v US.

 

[Cliveshep]

Most 12 volt circuits are fed as separate runs, each with it's own fuse and switch on the main panel. The exception seems to be lights which have a looping feed light on to next light and so on. It is not a ring.

This at least mean each circuit is protected and the cables can be sized accordingly.

240 volt is usually run as a ring main to sockets, but looping feeds to lights, with a switch cable from light to switch.

I don't know why but that is how it seems to be done.