1st breakdown in 6 years

[Bobsy]

Nice day so decided to take the Chim to work on Friday and got out a bit late so had to put the lights on (that was the clue), on the way home. I had just got onto the M5 northbound after putting in some Momentum 99 when it started missing and then the power went. The oil pressure also went low. I managed to get off onto Junction 14 slip road hard shoulder when it cut out. I immediately thought fuel but it wouldn't turn over so the battery was flat. I didn't have my tools and spares box in the car so had to be recoverd back home.
Yes it was the 100A fuse that I had in my kit. So the moral of the story is to carry the kit in future. I think you you can replace with a 125A fuse, comments please!!!!
Oh and thanks to the Tuscan (**TVR registration that went past and didn't even acknowledge)

[haircutmike]

I had that on a cold dark night.

I had to be towed back, no lights, country lanes on the back of my lifted Disco with bugger all visability, the most frightened I've ever been!

[taylormj4]

Why do these 100A fuses go ? Is it corrosion or are they actually blowing. It seems to be an age-related thing so I am guessing the former.
If that's the case, I'd stick with the 100A fuse. That fuse is there to protect the car from catching fire. Putting in a bigger one is not a good idea IMHO.

Even though rated at 100A, it will actually take many seconds of 100A to actually blow it, with instanteous blow needing many hundred of amps. In the time the fuse is conducting that current, things are getting pretty hot: 100A through a 0.1 ohm resistance (e.g. a broken +ve wire touching chassis even when making a poor contact) generates 1kW of heat (equivalent to a typical 1-bar electric fire).