The Big 3 - The final frontier
11-24-2006, 04:07 PM
#11
2000 Watt CAFz'r
Join Date: Jan 2001
Posts: 2,026
I would use one fuse between Bat and Alt:
Location: As close to the Bat as possible.
Fuse rating: The maximum the wire can handle (which had better be much higher than the alt's capability).
Grounds: In the case of a car accident. Jagged metal from an impact can easily cut that line and create a short circuit and fire. This is the only reason I would fuse that line.
Location: As close to the Bat as possible.
Fuse rating: The maximum the wire can handle (which had better be much higher than the alt's capability).
Grounds: In the case of a car accident. Jagged metal from an impact can easily cut that line and create a short circuit and fire. This is the only reason I would fuse that line.
11-25-2006, 04:12 AM
#14
2000 Watt CAFz'r
Join Date: Jan 2001
Posts: 2,026
Originally Posted by FusionMadsen
Yes, but having one fuse is pointless, because it is not only robbing amperage, but serves no purpose. You need 2 or none.
But you are going to need to explain why more than 1 is necessary. In the case of an accident, the alt (with the rest of the engine) will have stopped producing power, so the alt side of the wire is not the one dangerous for starting electrical fires. The battery, will be live until it is drained, leaving it dangerous - so I still stand on one fuse, right at the battery.
11-25-2006, 01:31 PM
#15
500 Watt CAFz'r
Join Date: Mar 2005
Posts: 884
Originally Posted by FusionMadsen
Yes, but having one fuse is pointless, because it is not only robbing amperage, but serves no purpose. You need 2 or none.
a proper fuse that could protect the alternator will be way too small for the wire (if you have done the Big 3). most decent alternator puts out like "110Amps-140amps" cold with engine running vs most batteries has a cold cranking of "800amps-1000amps" constant. I don't quite understand what the second fuse is going to protect?
11-25-2006, 09:58 PM
#17
500 Watt CAFz'r
Join Date: Mar 2005
Posts: 884
Originally Posted by FusionMadsen
The second fuse protects your alternator from any power spikes.
11-26-2006, 11:57 AM
#19
Originally Posted by SweetnLow91SC
what size fuse would you say would protect an 110amp alternator? and what are the "power spikes" from normally? (other then battery being jumped)
Dukk knows a lot more about the second fuse thing than me, hopefully he will make a post.
