Wiring fire, advice sought!

Wow, that is exactly what happened to my car yesterday! I have to blame myself for not noticing that the alternator wire had become slightly unclipped and dropped onto the manifold.
Always wiser with hindsight!
I have a friend who is an electrician coming 'round and we'll do as you suggest.
Just one question, does an in line fuse holder have the same rating/protection as a fusable link (30A, i'm thinking?).
thanks,
Tim