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Old 11-11-2010, 04:18 PM   #1
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Default Mini Bus or Terminal Block?

I see a lot of wiring diagrams and builds using terminal blocks....but the way they are being used, it makes more sense to use a minibus as a way to distribute power to the panel.

Making jumpers on a terminal block seems to be more labor intensive, but the terminal blocks look to be a fraction of the price of a minibus....$2 vs $12....I have also seem power distribution blocks for around $12 that look like they would be a clean wire management choice....

So what do you guys think?

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Old 11-11-2010, 04:41 PM   #2
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http://www.mcmaster.com/#terminal-blocks/=9o97w1

They have jumpers, which is a heck of a lot easier than making your own.
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Old 11-11-2010, 05:15 PM   #3
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You can use these:
http://www.mcmaster.com/#terminal-blocks/=9o9mp4
Or these:
http://www.automationdirect.com/adc/..._4%29/DN-T10-A

They make jumpers that you screw down to connect multiple blocks together - As many points as you need - Even odd numbers

They are cheap too, when you compare them to 30 amp terminal strips. $0.20 per terminal. Jumper 4 of them together and you have 8 30 amp terminals for $3.00

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Old 11-11-2010, 06:14 PM   #4
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So what kinda terminal blocks are you guys goin with? 300V 30A? I've seen good deals on ebay, I can get 4 blocks (2 hot, 1 neutral, and 1 grnd) for like $10. Then if I boutght a pack or 2 of these jumper plates, I should be good, right?

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Old 11-11-2010, 06:28 PM   #5
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this is what i did:

http://www.homebrewtalk.com/f51/din-...-guide-167345/

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Old 11-11-2010, 06:48 PM   #6
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Wow, that's great. I think it's crazy how the DIN-Mountable stuff gets so expensive.....kinda like the tri-clover of electronics Actually, I'm thinking about gluing components down where I can....unless it's a heat transfer thing like using heat sink grease on SSRs....

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Old 11-11-2010, 09:48 PM   #7
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I used 100 amp marine bus bars from Blue Sea Systems. They were 13 bucks ea.

http://www.westmarine.com/webapp/wcs...4&ci_sku=17284

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EDIT: you can see them installed somewhere on my build thread. I'm posting from my phone, and it's difficult to find the link to the specific page. I'll update this post when I get home.

OK, links to see them here and here.

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Old 11-11-2010, 09:56 PM   #8
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ScubaSteve, I use Wago's spring loaded blocks. No screws, you just stick a fiberglass screwdriver into one hole and the stick the wire into the other, pull the 'bone' out and it grabs the wire. No screws to come loose, etc etc. They offer different sizes for different gauge wires. The cool thing is they have little bus clips that connect the blocks together, you just push em in and you're done.

Now all the manufacturers have a spring clip version of their blocks, I just happen to use the wago 280 series the most. Just search for wago 280
Here's some 4bangers. all the pins on one block are tied together.

http://cgi.ebay.com/Wago-280-626-Sta...#ht_3094wt_905

and here are the jumpers
http://cgi.ebay.com/Wago-280-402-Jum...#ht_2761wt_905

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Old 11-11-2010, 10:00 PM   #9
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I used modular DIN rail mounted terminal blocks for my power distribution.

parts numbers are all in this post:
http://www.homebrewtalk.com/f51/my-h...7/#post2003768

Rated for 750V/50A and easily expandable. The jumpers screw down into the tops to connect modules together.

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Old 11-12-2010, 01:18 AM   #10
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I used the same terminal blocks as Walker, but I used a couple different sizes. One thing I found is that a lot of suppliers want to sell the terminal blocks in fairly large quantities (like 50), Mouser.com will sell 1 each if you want.

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