Posted by Bob M on May 12, 2009 at 08:23:20 from (151.190.254.108):
In Reply to: In-Line Fuse posted by Johnny Lawson on May 12, 2009 at 05:10:54:
Good advice below from John T. Expanding just a bit:
1 - DON'T use a fuse in the alternator output circuit (alternator BAT to ammeter to battery + post). Reason: Should the fuse ever let go while the alternator is charging it'll likely ruin the alternator.
Note that OEM manufacturers typically do not fuse this circuit for this reason (also for cost...)
2 - For your 39 amp alternator use a minimum of #10 wire for the circuit above (#8 is preferred.)
3 - Assuming only normal electrical loads on your H (ie. just lights and ignition using #14 wire) use a 20 amp fuse where the lights/ignition switches get power - ie. at the the ammeter post wired to the alternator. This will locate the fuse conveniently in the ammeter box - just like the tractor was wired orginally.
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