Fuse question
06-14-2006, 01:43 PM
#1
Fuse question
If I have a fuse near the battery on a 4 guage that runs to a distribution block in the trunk, do I also need fuses on the power line of each component that gets power from the distribution block, even if each component has (a) built in fuse(s)?
06-14-2006, 02:09 PM
#3
Originally Posted by Lytheum
as long as you have the fuse up near the battery you are fine
No need for extra fuses when you already have the main one...it just adds to what you have to troubleshoot if there's a problem.
06-14-2006, 03:06 PM
#6
Senior Member
Join Date: Dec 2005
Posts: 115
If you are using a distrubution block to smaller gauge wire for the components you should be using fuses. The fuses in the power wire system are not to protect the amps but for the wires themselves. So it is possible for the main fuse to protect the 4 ga wire, but have too high an amp rating for what the smaller 8 ga wire can handle.
Obviously it's not an absolute requirement and will work without extra fuses, but the idea is the extra measure of safety.
Obviously it's not an absolute requirement and will work without extra fuses, but the idea is the extra measure of safety.
06-14-2006, 03:12 PM
#8
Senior Member
Join Date: Dec 2005
Posts: 115
Overload. It's the same reason for the main power wire fuse. Example.. if for some reason a wire gets cut and exposed to direct ground without a fuse the wire will overheat and burn up, melting the plastic coating if you are lucky, starting a fire if you are not 
06-14-2006, 03:17 PM
#10
Senior Member
Join Date: Dec 2005
Posts: 115
http://www.bcae1.com/fuses.htm
That's why the main power wire fuse is supposed to be as close to the battery as possible ( i believe the standard is 12" or less) because it is unprotected from the battery to the fuse.
That's why the main power wire fuse is supposed to be as close to the battery as possible ( i believe the standard is 12" or less) because it is unprotected from the battery to the fuse.
06-14-2006, 08:20 PM
#11
Originally Posted by Jay_Alix
Overload. It's the same reason for the main power wire fuse. Example.. if for some reason a wire gets cut and exposed to direct ground without a fuse the wire will overheat and burn up, melting the plastic coating if you are lucky, starting a fire if you are not
It doesnt matter where the power wire is, how big it is or how long it is, how many times its been distributed. If it touches ground, the main fuse will pop. That will end power throughout the entire circuit.
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