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I bought a power supply so I can start experimenting with larger arrays of LED strips at home (I was previously using a wall wart with a small display). The power supply provides 40A at 5V, however, the power supply only has one + and one – terminal. How can I safely split the current to multiple strips? I am looking at terminal connectors:

http://www.amazon.com/Blue-Sea-Systems-Circuit-Terminal/dp/B000K2K6L6/ref=pd_bxgy_200_3?ie=UTF8&refRID=0HDQC12FCR3V0GJ967X

but I only see them rated for 30A at maximum. I would feel better if they were rated much higher than 40A. Somebody told me I could daisy chain them together but it seems like I would still need to pass 40A through the first one. Would it be better to use a bus bar? Also, can you recommend a fuse?

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  • \$\begingroup\$ Be careful with the wires as well. You'll probably want 10AWG out of the supply or even 8AWG. \$\endgroup\$ – Fizz Nov 10 '15 at 15:53
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With that terminal strip you have 12 individual connection points. You really need a bus bar like this:

http://www.ebay.co.uk/itm/like/310173026317?adgroupid=13585920426&hlpht=true&hlpv=2&rlsatarget=kwd-131843267586&adtype=pla&ff3=1&lpid=122&poi=9045629&ul_noapp=true&limghlpsr=true&ff19=0&device=c&chn=ps&campaignid=207297426&crdt=0&ff12=67&ff11=ICEP3.0.0-L&ff14=122&viphx=1&ops=true&ff13=80

For fuses, I suggest you look at automotive blade fuses. These are affordable and rated to 40A and more.

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  • \$\begingroup\$ Great, thank you. Just to be clear, I would need two of these, right? I would connect the first one to the positive terminal of the power supply and connect it to the + terminal on each of the strips. The other bar would be connected to the - terminal and then to the GND terminal of each of the strips. \$\endgroup\$ – user3390169 Nov 10 '15 at 17:36
  • \$\begingroup\$ Yes you need 2. You may be able to find 2 already in a box with fuses if you look for marine or automotive power distribution boxes. \$\endgroup\$ – Icy Nov 10 '15 at 17:41

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