dbackfan12 Posted March 14, 2016 Report Share Posted March 14, 2016 When using a distribution bar for a ground connection would it make a difference if you used one or multiple runs to the chassis and then connecting seperate runs to batteries. Im just wondering if you need more runs to the chassis or sufficient surface area on the actual bar. Link to comment Share on other sites More sharing options...
brent379 Posted March 14, 2016 Report Share Posted March 14, 2016 this may not be completely accurate, but im pretty sure it will depend on the amperage you are pulling between all the runs. if your only pulling say 300 amps, and as long as you use good 1/0 ofc wire, then 1 run to the frame SHOULD be sufficient. but if you have 2 amps pulling 300a a piece, then you need 2 runs to the frame. just because its a distribution point doesnt mean 1 run will be sufficient. its still all about amperage. pulling 400a thru a wire that is rated at 300a will have to much resistance. its never a bad idea to have 1 to many runs to be on the safe side. if you second guess if 1 run will be enough, then run 2 and KNOW your safe Link to comment Share on other sites More sharing options...
MotorCityFats13 Posted March 14, 2016 Report Share Posted March 14, 2016 It has to be equal to the power run so the ground does not become the bottle neck... if you are using 1 run of 1/0 for the + and its proper-sized to the draw you are pulling then it would be sufficient in a distribution bar..... if you do more on the ground side then the power becomes the bottle neck.... shorter cables are better than longer cables so most of the time the ground path is the better of the 2 and more attention is directed towards the power run..... are you using manufactured buss bars or making your own... I use 1/4" aluminum bar stock from home depot on my + and - runs no extra batterys 4awg cca on only maybe 1500rms Link to comment Share on other sites More sharing options...
dbackfan12 Posted March 25, 2016 Author Report Share Posted March 25, 2016 It has to be equal to the power run so the ground does not become the bottle neck... if you are using 1 run of 1/0 for the + and its proper-sized to the draw you are pulling then it would be sufficient in a distribution bar..... if you do more on the ground side then the power becomes the bottle neck.... shorter cables are better than longer cables so most of the time the ground path is the better of the 2 and more attention is directed towards the power run..... are you using manufactured buss bars or making your own... I use 1/4" aluminum bar stock from home depot on my + and - runs no extra batterys 4awg cca on only maybe 1500rmsIm gonna attempt to make my own hopefully, so if I have 2 runs of 0 gauge do I have to make the bars a specific size to handle the curren as well? Link to comment Share on other sites More sharing options...
ShadeTreeMechanic Posted March 25, 2016 Report Share Posted March 25, 2016 The cross sectional area of the buss bar should be equal or greater than the total cross sectional area of the cables feeding it. 91 C350 Centurion conversion ( Four Door One Ton Bronco) 250A Alternator (Second Alternator Coming Soon) G65 AGM Up Front / Two G31 AGM in Back Pioneer 80PRS CT Sounds AT125.2 / CT Sounds 6.5 Strato Pro component Front Stage CT Sounds AT125.2 / Lanzar Pro 8" coax w/compression horn tweeter Rear Fill FSD 5000D 1/2 ohm (SoundQubed 7k Coming Soon) Two HDS315 Four Qubes Each 34hz (Two HDC3.118 and New Box Coming Soon) Link to comment Share on other sites More sharing options...
dbackfan12 Posted March 26, 2016 Author Report Share Posted March 26, 2016 Really, so if I had a 1 inch Wire in diameter using A=pir^2 I would only need about. .8in^2 of cross sectional area on the bar? Would that be doubled for two runs and 3x for 3 runs and so on? Does the length of the wire matter? Link to comment Share on other sites More sharing options...
ShadeTreeMechanic Posted March 26, 2016 Report Share Posted March 26, 2016 Yes. The length of the wire is not an issue at the short lengths used in a car. 91 C350 Centurion conversion ( Four Door One Ton Bronco) 250A Alternator (Second Alternator Coming Soon) G65 AGM Up Front / Two G31 AGM in Back Pioneer 80PRS CT Sounds AT125.2 / CT Sounds 6.5 Strato Pro component Front Stage CT Sounds AT125.2 / Lanzar Pro 8" coax w/compression horn tweeter Rear Fill FSD 5000D 1/2 ohm (SoundQubed 7k Coming Soon) Two HDS315 Four Qubes Each 34hz (Two HDC3.118 and New Box Coming Soon) Link to comment Share on other sites More sharing options...
MotorCityFats13 Posted March 26, 2016 Report Share Posted March 26, 2016 I use the 1/8th inch aluminum bar stock from homedepot, both my + and - runs consist of double layers bolted together at 12 inches each at $11.63 for 48 inches.... I dont have any cool hookups for aluminum bar stock but I know in my setup these bars could probably pass current 4x what I am pushing.... do 4 layers and I cant see any problems with even 10kw..... but I didnt do any math Link to comment Share on other sites More sharing options...
dbackfan12 Posted March 27, 2016 Author Report Share Posted March 27, 2016 Hey bro do you have a pic of your bar set up? Link to comment Share on other sites More sharing options...
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