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Fuses or Circuit Breakers?


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KPierson 
Platinum - Posts: 3,526
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Joined: April 14, 2005
Location: Ohio, United States
Posted: January 23, 2011 at 7:05 AM / IP Logged  
installsbyeric wrote:

Every install I do with any system I put the biggest fuse in as possible.  If I am using AGU fuses, I take out the one that comes with the kit, and put in a 100 amp fuse.  If I am using ANL fuse holder, I put in a 300 amp fuse.

Why do I do this?  two reasons.  1.  All modern amps have their own protection in the amp.  The fuse has nothing to do with protecting your amp.  The fuse is there to protect you and your car from catching on fire in the event of an accident or if your power wire was not installed properly and shorts out.  If you have no fuse, that wire will get red hot and your car or customers car can catch on fire if it got shorted out in a accident or if installed wrong.  Reason 2 is the fact that I want to feed the amps as much power as I can get in to them and try to cut down on voltage drop from adding the fuse holder in the first place.  The more voltage at the amp the more power your amp puts out. 

And you haven't caught a car on fire yet???????
The fuse, at bare minimum, needs to be sized to the size of wire used, NOT the biggest fuse you can fit in the fuse holder.
What's the voltage drop on a 60A fuse vs. a 100A fuse? How much more wattage will a typical amp make based on this voltage drop?
Kevin Pierson
i am an idiot 
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Joined: September 21, 2006
Location: Louisiana, United States
Posted: January 23, 2011 at 9:07 AM / IP Logged  

Sometimes all I can say is WOW.  This is another of those times.

oldspark 
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Joined: November 03, 2008
Location: Australia
Posted: January 23, 2011 at 4:11 PM / IP Logged  
Not that I have time to peruse, but is this one where I say cable fusing is NOT to protect the equipment, but the cable?
(But that the fuse size shall not EXCEED any downstream UNFUSED section, etc etc.
I will be going KISS soon - if not already!
i am an idiot 
Platinum - Posts: 13,255
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: January 25, 2011 at 9:54 PM / IP Logged  
KISS is good, because I have trouble keeping up when it gets complicated.
04nata 
Copper - Posts: 358
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Joined: April 22, 2008
Posted: March 22, 2012 at 2:55 PM / IP Logged  

Long answers = compensation for shortages in other areas

Like big trucks     Fuses or Circuit Breakers? - Page 2 - Last Post -- posted image.

2004 Hyundai Sonata
Kenwood KDC-X599 HU
2-Sundown X-18D4
2-SQ Q4500.1
2-SQ Q90.4
1-Massive DBX4
8-Niche 5.25 mids
8-Niche Tweeters
4-Skar 8" mid-bass
OhioGen 220a alt
OhioGen 350a alt
156.0
oldspark 
Gold - Posts: 4,913
Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: March 22, 2012 at 7:33 PM / IP Logged  
It's a somewhat sleeping thread, but thanks for the comment.
Alas it seems my "future" KIS(S) mode that I referred to has since reverted back to L-O-N-G mode... Fuses or Circuit Breakers? - Page 2 - Last Post -- posted image.
And I like truck drivers. If only our drivers were as talented!
Thanks.
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