jrath Posted October 17, 2013 Report Share Posted October 17, 2013 I recently bought a copper bus bar and want to use it for grounding my amps. I plan on attaching it to the negative terminal on the battery under the hood and both negative terminals on the two batteries in the trunk. Do I also need to attach it to the chassis as well? Of the three batteries in the car the only one grounded to the chassis is the one under the hood. Any setup options and advice would be greatly appreciated. Link to comment Share on other sites More sharing options...
Karkov Posted October 17, 2013 Report Share Posted October 17, 2013 I would like to add question as well (without thread stealing) What type of metal bolts would others suggest? I read about using stainless on aluminum but what to use on copper buss bars? 2007 Chevy Tahoe (SOLD) 12 ~ FI Audio X series 10" w/BP option 2 ~ DC Audio 5.0K @0.67 3 ~ DC Audio 5.0K @1.0 2 ~ PPI 3 way sets (not installed yet) 1 ~ RF T400-4, 1 ~ RF T600-2, 1 ~ RF T600-4 4 ~ CT Sounds 5.25" Strato comps (rear fill only) 1 ~ XS Power D4800 1 ~ XS Power D3400 8 ~ XS Power XP3000 160 stock alt, Mechman 370 Elite, 185 DC Power 320+ Sq. Ft. Sound Deadener Pioneer AVH-X5500BHS Youtube: https://www.youtube.com/user/knfjdkghjudfhsgkjdhf/videos?sort=dd&view=0&shelf_id=0 Link to comment Share on other sites More sharing options...
graham0599 Posted October 17, 2013 Report Share Posted October 17, 2013 Definitely attach to the chassis/frame. I'd ground the other batteries too. My 350z build- http://www.stevemeadedesigns.com/board/topic/174424-2008-350z-build/page-2?hl=%2B350z+%2Bbuild#entry2605678 Link to comment Share on other sites More sharing options...
john253a Posted October 17, 2013 Report Share Posted October 17, 2013 If you don't ground the batts in the trunk then they won't work Once you flaten them they will have no way of recharging Use the buss bars to join the 2 (-) and 2 (+) together You don't need then in the front at all Run big 3 to front batt like normal And run another 1-3 lines to rear batt from all (number of lines depends in alt power) How're ever many (+) lines you have you need the equal amount of earths For a 300 amp alt idd do 2 0g run to rear batt And 1 to front batt I would then do 2 grounds at rear batt And 2 grounds from alt/engine 1 from alt/engine to main batt And 1-2 from main batt to chassis Link to comment Share on other sites More sharing options...
jrath Posted October 18, 2013 Author Report Share Posted October 18, 2013 I was under the impression that the "best" ground for trunk batteries and amps would be a 0 gauge wire from the negative battery terminal under the hood rather than the frame/chassis/body. This is why I wanted to run the hood battery to the copper bus bar in the trunk and attach everything to this. I was told that a vehicle frame is skeptical and could carry lots of resistance (metal, rust, etc). I figured the 0 gauge copper wire would be a better option. Link to comment Share on other sites More sharing options...
g2shuck Posted October 18, 2013 Report Share Posted October 18, 2013 I was under the impression that the "best" ground for trunk batteries and amps would be a 0 gauge wire from the negative battery terminal under the hood rather than the frame/chassis/body. This is why I wanted to run the hood battery to the copper bus bar in the trunk and attach everything to this. I was told that a vehicle frame is skeptical and could carry lots of resistance (metal, rust, etc). I figured the 0 gauge copper wire would be a better option. tony damore did a video on this and unless you are running MASSIVE power chassis grouns id the way to go versus buying all the extra wire to run from front battery to back battery. 2000 Toyota Camry With Sealed Off Trunk Sky High OFC Wiring DC Power 270 XP Alt AQ 2200 Sub Amp Two DC Level 4 m2 12s 80 Mil Murdetmat Gathering Parts For Wall Build. Team DC Audio 2014 Member Link to comment Share on other sites More sharing options...
MrSkippyJ Posted October 18, 2013 Report Share Posted October 18, 2013 Ground the back batteries to the chassis. The amps can go to the back batteries OR the chassis. What ever is easiest for you. F150: Stock 2019 Harley Road Glide: Amp: TM400Xad - 4 channel 400 watt Processor: DSR1 Fairing (Front) 6.5s -MMats PA601cx Lid (Rear) 6x9s - TMS69 Link to comment Share on other sites More sharing options...
jrath Posted October 18, 2013 Author Report Share Posted October 18, 2013 Thank you guys. I will ground both trunk batteries to the frame. I will ground my amps to the negative battery terminals. Link to comment Share on other sites More sharing options...
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