(ET) What size fuse

[Christopher Zach <czach computer org>]

Ok, here is a question for the list: What size and type of crash fuse 
should one use for an Elec-trak?

I'm curious after blowing up that battery pack the other day. I think 
300amp slow blows are not a good idea, and I have two battery strings. 
Then again I use the tiller and the blower, and those can pull way over 
150 amps for brief spikes.

So what size fuse should I be using? And if I have two batteries should 
I use a fuse at the end of the string, two fuses in the middle at half 
rating, or three fuses; one in each string, and one on the end?

Chris