Originally Posted by montgomery_30824
and this is where common sense comes into play. don't wire your amps up with too small a gauge of wire. and i am sure he's not running thousands of watts of power so I am sure that 8 AWG is plenty big enough for his purpose. so again, stay with the rated fuse for what you are running and not what the wire is rated for because that will, in most cases, be too large of a fuse to protect anything.
Did you miss the sentence after what you bolded? It was an exaggeration of the point. But the point still remains valid. The inline fuse (which should be no farther than 18" from the battery) is there to protect the power wire. It is not meant to protect anything else.
If you have properly fused components that draw more power than the power cable can handle, or you have a short, the inline fuse will go before the wire gets so hot that it catches things on fire. The maximum size for the inline fuse should be based on the ampacity of the wire, not what is drawing power from it. The minimum size for that fuse can, and wisely, is based on the total current draw of the components drawing power from that wire.
Common sense should say that you want power cable that is safely capable of carrying the amprage draw from the amps or what ever you are powering with it. The part of that safety is a fuse that is below the ampacity of the wire.