Hello,
Sorry I have not been on the forums recently.
Professorhat is correct that the fuse needed will depend upon the component being powered. Firstly, do check the manual of your equipment as this may give advice as to what rating of fuse your component requires. If the manual does not list the rating of fuse required then you can check the fuse fitted to the supplied factory power cable.
Hope this helps.
Kind regards,
Darren