Originally Posted by 97 SL320

You can get ATC fuse holders in a block, some are stackable for length. Look at a truck body building supply web site or a company like Painless wiring.

For proper fusing, the max load plus some % would be more proper than wire size. A clamp on amp meter is very helpful here,make sure it will read DC , the less expensive ones only read AC. ( Tenma www.mcmelectronics.com/manufacturer/TENMA/01001018 is a decent house brand , Extech is great www.extech.com , Fluke is high end.

Fuse curve matters too. Take a look at Digikey , MCM , ( Farnell for the Brits on this list ) or similar for fuse data sheets. You will see a fuse can carry more that it's rating for X amount of time. As a side note, 60's - 70"s Brit cars used fuses of a different rating and installing a USA rated fuse will cause a melt down if the circuit is overloaded.