Battery post fuse - unfused circuits

[anthonym]

https://www.12voltplanet.co.uk/battery-terminal-cube-fuses-50-300a.html

These ingenious battery terminal (or cube) fuses solve this problem by mounting directly into a terminal clamp and totally eliminating any unprotected section of cable, giving you maximum protection for your circuits.

What do we think?

Seems to me it's a case of whether the starter or alternator will blow it anyway. However, as I understand it, the given rating is the "constant current" ability and the blow current will be double, which is say 600 amps in this case. 

The idea of no un-fused circuits (ignition, alternator, starter, fuse box) is rather nice. The alternative being that the shorted unfused wire is acting as it's own fuse, as a "fusible link". It's all about preventing fire aiui.

Here's another idea in the same vein (protecting unfused circuits), except it runs to 600 amps continuous (I presume):

https://www.mouser.ch/ProductDetail/Littelfuse/0FHZ0201Z?qs=sGAEpiMZZMtRmoYvq3OwzP5mGq8iSmn3yGIJM12QWPmFlXd6Uo9aOA%3d%3d

The arguments on the internet (as in discussions) seem to be about at what length of wire point it is worthwhile to fuse the circuit. So a short cable, say 30 cm isn't worth fusing because it will burn itself out like a fuse, whereas a long cable, like my (at least) two metre alternator B+ cable will fry everything else, the car included, before burning itself out.

That as far as I think I understand it.   

Anthony

[rj]

With all the issues I've seen with fuses on batteries I don't want one there.

[Jonathan Kay]

What risk are you trying to manage?

Jonathan

[anthonym]

one of ignorance

or in the alternative:

death. 

:-)

[anthonym]

rj - do tell, I detect stories available for the listening?

[rj]

Failed fuses due to corrosion / vibration.

Very common on VAG cars.