The problem is finding a fuse that will allow the engine to start...ie starter can draw several hundred amps, but actually blow when there is a fault like a short...which may actually draw less than starting the engine depending on severity of that short.


If you must run a fuse, run 2.

One on a dedicated line to the starter only, and then another for all the other devices that may need powered.

Also bare in mind, that once the engine is running all power is provided by the alternator and any excess charges the battery. So actual current draw on any accessory line once running probably wont be that large.

But run the large battery cables somewhere safe and less likely to get damaged in any impact and there should be almost no risk.