Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing Sizing Battery Fuse?

Best to use an entirely new positive battery cable Colin, unfused (starter feeds are rarely fused and you don't want joins in this cable anyway) direct to starter battery connection assuming it's piggy back solenoid type. If it's older pre-engaged type then connect to remote starter solenoid.

Given the short run in either case you can then take a short lesser current cable via an 80 amp fuse if you wish (although I wouldn't bother for such a short run as circuits will be individually fused later) to main 12 volt distribution post and/or alternator output from the same starter or solenoid connection terminal.

Suggest 50mm2 for starter cable and 10mm2 for main distribution.