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what size fuse.


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scooter99 
Copper - Posts: 63
Copper spacespace
Joined: December 17, 2009
Location: California, United States
Posted: February 15, 2010 at 11:51 PM / IP Logged  
Ok so I'm installing my sq system in my car.  I have 2 Audison amps, LRx 4.1K and 6.9.  Those total 180 amps for the fuses.  Ok that makes since.  I have a distro block for those and will fuse accordingly.  My question is this.  I have all my components, leds, head unit, processor, and stuff like that running out of that distro block as well.  How do I fiugre out the size of that fuse?  Do I need to add up all the components and stuff powered off of that and that would be the size of the fuse? 
scooter99 
Copper - Posts: 63
Copper spacespace
Joined: December 17, 2009
Location: California, United States
Posted: February 16, 2010 at 11:28 AM / IP Logged  
Ok so here's what I've found out by looking in the owner guide. The interior fuse box is drawing, or can potentially draw, about 375 amps according to adding up all the fuses. And the fuse box under the hood is drawing or potentially drawing 597.5 amps. That's a lot. Can anyone here help me with the starter. I'm not seeing a fuse for the starter in either box unless of course I'm not looking at it correctly. What should that be fused at?
I've got pictures uploading and will be posting sometime today! Stay tuned.
scooter99 
Copper - Posts: 63
Copper spacespace
Joined: December 17, 2009
Location: California, United States
Posted: February 16, 2010 at 11:29 AM / IP Logged  
Sorry pasted my last response from another forum, there are no pictures.  Disregard that last sentence.
howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: February 16, 2010 at 5:28 PM / IP Logged  
Add the draw of all of these then add 5amps to the total for your main fuse located 4" from the battery or half the cable diameter divide the loads (like an R/Start does)and run two or more fuses at the battery. Starter motors solenoids generally don't have fuses, the solenoid draws about 15 amps and turning over the draw is 50-90 amps.
Don't forget not everything will be on at once, most modern cars have multiple ignition wires, when the key is moved to the start position, for instance as a rule only ignition1 and starter circuits are live.
i am an idiot 
Platinum - Posts: 13,276
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: February 16, 2010 at 7:32 PM / IP Logged  
Power & Ground Cable Specs
Cable Size
Wire Gauge
Current Capacity
Amperage (amps)
1/0 350
2 225
4 150
8 100
10 60
12 40
14 25
16 15
The fuse you are going to put at the distribution block is there to protect the wire that feedsall the other things.  It should be fused at or preferably below the current capacity of the wire being used.  Way below is always better. 

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