Best Answer
Spider
,
27 October 2019 - 05:37 PM
I note the title of your thread here, but all the same, I think the first things to establish are;-
What items you want running Live all the time,
What items you'd like on the Accessories Circuit and
What items you'd like Live only with the Engine running
This will narrow down were to get the feeds from.
Then in each of these groups, how many fuses you'd like to have, which is not always straight forward as real estate to put a big fuse block in isn't always available and keep in mind as well, for every fuse, it does mean running another wire. 1 or 2 wires on their own don't add up to much space but when you start getting up around 8 or 12, it does and needs some planning on how to run these wires.
The other aspect of how many circuits also comes down to what style of fuse you'd like to use and what's commercially available. It's a wise idea to stick with the same fuses that are already in the car or convert that fuse block to a type you'd rather have.
I nearly always run the Blade type fuses these days as they take up way less space, readily available and highly reliable as well as sealed fused boxes being available in configurations from about 4 to 12 fuses.
Coming back to the feeds for the circuits, an item like your clock needs to be live all the time, yet the Temperature Gauge you'll only want coming on with the Engine, so this might give you a guide as to how to split them up. USB sockets, I tend now to run from the Accessories, though if you are thinking of having them Live all the time, I'd suggest finding those without an LED in them.
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