Sanitarium Posted December 22, 2010 Report Share Posted December 22, 2010 If you got 2 amps that need 100 amps of fusing, you need a 200 amp fuse up front and wire that can handle that. Quote Link to comment Share on other sites More sharing options...
ptcary Posted December 22, 2010 Author Report Share Posted December 22, 2010 If you got 2 amps that need 100 amps of fusing, you need a 200 amp fuse up front and wire that can handle that. Thanks Sanitarium, I was just confused as others are saying that these amps would draw on average 60 amps each, so we were hoping he could stay with all 4 gauge and fuse a little less. I guess if RF says 100amps each, there is a reason. Quote PTCary 2003 SMD PT Cruiser 2011 Honda CBR 250R 2010 Mazda 3i Sport MY BUILD LOG Link to comment Share on other sites More sharing options...
Superjay Posted December 23, 2010 Report Share Posted December 23, 2010 you are off...OFC true 4 gauge ampacity is 125 amps Quote Principal JTech Consulting - Leader in 12-Volt Training and Product PlanningIt's not about how much power you have, but how well you use it Link to comment Share on other sites More sharing options...
Superjay Posted December 23, 2010 Report Share Posted December 23, 2010 use 2 gauge or 1/0 for the main run, or you will overpower the wire. Quote Principal JTech Consulting - Leader in 12-Volt Training and Product PlanningIt's not about how much power you have, but how well you use it Link to comment Share on other sites More sharing options...
ptcary Posted December 24, 2010 Author Report Share Posted December 24, 2010 use 2 gauge or 1/0 for the main run, or you will overpower the wire. Thanks Jay, I recommended 1/0 to him as I have never readily seen 2 gauge for sale. Quote PTCary 2003 SMD PT Cruiser 2011 Honda CBR 250R 2010 Mazda 3i Sport MY BUILD LOG Link to comment Share on other sites More sharing options...
fullofpurple Posted December 24, 2010 Report Share Posted December 24, 2010 use 2 gauge or 1/0 for the main run, or you will overpower the wire. Thanks Jay, I recommended 1/0 to him as I have never readily seen 2 gauge for sale. http://cgi.ebay.com/NEW-Rockford-Fosgate-CP2POS-2-Gauge-Amp-Kit-1800W-RMS-/380161907719?pt=LH_DefaultDomain_0&hash=item58836a5c07 ebay, rockford fosgate 2gauge,good wire have it and had their 4gauge of it before,thick jacket flexible The 2gauge can handle max a 250A anl fuse but with the 2gauge kit get a 200A anl fuse so replace the 100A anl fuse it comes with on the kit,run 2 4gauge wires 2 the amp with the best amp fuse around there amp size. i have this wire currently and 4gauge wire the 2gauge is like 1/0, 4gauge wouldnt be bad thow about 20.00 cheaper Quote Link to comment Share on other sites More sharing options...
Alex K Posted December 24, 2010 Report Share Posted December 24, 2010 (edited) BUY YOUR WIRE HERE!!! CLICKY. I'd run 1 strand of 1/0 gauge>300A fuse>Dist block>4 gauge>140A fuse> amp. That 4 gauge is reccommended at 140a for a reason. Sure you can run more than that, but it'll be funny once you burn right through the jacket and short on your chassis edit: dammit im tired keep hitting wrong keys >={ Edited December 24, 2010 by Alex K Quote 2006 Nissan Z Track. My Feedback Thread i used to think a band pass was something you were around your neck or something. Link to comment Share on other sites More sharing options...
fullofpurple Posted December 24, 2010 Report Share Posted December 24, 2010 BUY YOUR WIRE HERE!!! CLICKY. I'd run 1 strand of 1/0 gauge>300A fuse>Dist block>4 gauge>150A fuse> amp. That 4 gauge is reccommended at 140a for a reason. Sure you can run more than that, but it'll be funny once you burn right through the jacket and short on your chassis i hooked up my friends chevycaprice with the 135A ex cop car alt,big 3,extra batt in the trunk and 4gauge power wire with 150A anl fuses,2 fosgate 800a2 amps and a cheap orange powerbank amp. we had a cap installed and it says around 200amps somtimes. i believe it because it has a optima in the trunk and a auto zone yelow top batter under the hood the fuse hasnt blew yet? Quote Link to comment Share on other sites More sharing options...
dereileak Posted January 4, 2011 Report Share Posted January 4, 2011 (edited) This is for all the people who do not understand fusing. As of now, ignore what your amps need for a fuse, you need to have a fuse up by the battery that is designed for the wire that is carrying the load back to the amp. If the amp takes 500 amps of power to run, but the wire is only Capable of 125 amps, you DO NOT PUT A 500 AMP Fuse up by the battery (if you can find a fuse that big). You would put a ~120 amp fuse, the fuse in the front is designed so you do not end up with a pile of ash as your car has now burned to the ground. If your amps need more power then your wire, then you need to either do one of 2 things 1. Upgrade the wire to take the load, go to 1/0 gauge wire from 4 gauge or 2. Play your music at a lower volume so you do not blow the fuse. As you increase the amount of amperage through the wire, the wire will naturally heat up and this also brings causes the resistance to go up slightly as the wire is pushing more current through it. If the wire is to small the wire will melt the casing, then short out the battery, and cause 1000+ amps to push through the wire, if you have the fuse in the front you will only damage the wire before the fuse, and nothing else as long as the fuse was the right size and the fuse popped before the wire started to melt the casing. Now the fuses that the amps have in them are for protecting them. This is a decent way to figure out what size wire you need. If your amp has a 100 amp fuse, and you have another amp with a 150 amp fuse, then you need a wire that can allow 250 amps of power at its maximum. You would then buy 1/0 gauge wire, fuse it to what it is rated, and you will have the limitation removed. Now it is up to the cars battery and alternator to supply the current and that depends on your setup and whether you will even be able to get enough current to the amps. Battery+++++++Fuse+++++++++++++++++++(Amp Fuse)+++Amp-----------Ground |_XS_POWER|-------[120]--------------------------------------------[100][KICKER ZX ]--------[]O Also something else to think about, depending on what brand of wire, you have to fuse accordingly, if you have some KNU Kolossal 4 gauge wire then you fuse it at 120 amps, if you have some cheap off brand crap wire that comes with a 60 amp fuse, but claims to be 4 gauge, you fuse it at 60 amps, as it is underspec, and you got cheap wire. It is not hard. FOR THOSE WITH NO FUSE IN FRONT - Go out to your car now, and disconnect your power wire to your amp right NOW! All it takes is that wire to short, which means the end of it hitting a ground, or the wire casing getting cut into and shorting somewhere else. I would hate to see you on the news because your car blew up like a bomb, it is not pretty. Anyways, those are my 2 cents for the night. There is even more I can cover on this, such as grounds and that. Electricity is known to have a flow with the electrons moving, which happens to be from ground back to positive. Many people think of it as positive to negative, and there are 2 theories on this, but the most accepted and recent one is negative to positive, as the electrons flow. So in that mannor, always have your ground wire the same if not bigger then the positive, and please for the love of God remove the paint before you ground it. I could ramble on more about grounding spots, but i'll save that for anther time. Car audio is about learning and having fun while doing it. But i dont think learning about fusing after the fact (Car burns down) would be much fun Edited January 4, 2011 by dereileak Quote 2006 Mazda3 Hatchback Black 5 Spd ManualPioneer 4300DVD2 Sundown SA-12 (34hz Tune, 3.22 cubes, 14.5 inches per cube, Triple Baffle)Kicker 10ZX2500.1 (2845 RMS) Sub AmpKicker 11ZX650.4 (705 RMS) Mid Amp -- (3 Amps)Kicker KQ3 Active CrossoverKicker KQ30 EqualizerKicker 09QS60.2 Components (Woven Carbon Cones)Kicker 09QS65.2 Components (Woven Carbon Cones) - (3 Sets)2/0 Gauge Electron Beam Technologies (3 Runs, 2 +, 1 -) 1/0 Gauge KNU Kollasal Flex (1 Run for -) 300 Ft Kicker X-Series 16 Gauge Speaker WireXS Power D3400 (Rear)XS Power D3100 (Front)Singer Externally Regulated Alternator (Being Built)+ The Love for Car Audio and BASS <3UBL Build Log <------- Click Here-------> Normal Build Log (For Comments) Link to comment Share on other sites More sharing options...
Autruche Posted January 4, 2011 Report Share Posted January 4, 2011 Thanks Jay, I recommended 1/0 to him as I have never readily seen 2 gauge for sale. It is readily available, it's called "the install bay" "0 gauge" on ebay, lol. But seriously, you just need to run wire that can take the power those amps need, I'd go with real 0 gauge, fuse accordingly at 200-250 amps by the battery, and use a distribution block to bring it down to 4 gauge for both of the amps, and fuse them accordingly. Also, while you're at getting the right wire and fuses and fuse blocks, get an extra fuse and block and some extra wire and do the big three. These are good fuse blocks, I use them all the time, cheap and combined shipping ftw: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300417204547&ssPageName=STRK:MEWAX:IT#shId Need some cheap ass terminals too? check here: http://impulse-electronics.com/terminals_splices.aspx?sub_key=&id=91&cat_nm=10&key=Eyelet%20Terminals Quote Need Test Tones/Sine Waves? Click Here!My Saab 9000 build1993 Saab 9000 Aero 5spdPioneer - Zapco - Hifonics - Sundown Audio - O2 Audio - RE AudioJust Say No To Rear SpeakersJust Say No To CCA WireReal Men Drive StickHit me up on Facebook, if you want Link to comment Share on other sites More sharing options...
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