How many bus bars do I need?

[WhiteArmadilloBrewing]

Bought these bus bars for my control panel.

https://www.amazon.com/gp/product/B000K2K6M0/?tag=skimlinks_replacement-20

Running a 240v 30a from my dryer receptavle through a 50a spa panel to power two pumps, one 4500w/one 5500w element, 2 EZBoils, and a RIMS tube (1500w element). I also have two 240v contactors, two 40a SSRs, and a few switches

How many do I need? I've got (3) 5 Circuit and (1) 10 circuit. Thanks!

 

[BitterSweetBrews]

You will need one for each power wire. I would get them with at least 16 terminals. You will have to jumper one side for power to be available on all the terminals you will be using.

 

[WhiteArmadilloBrewing]

16 terminals?! The reason I went with these ones was because I couldn't find a picture/diagram needing that many terminals. Does anyone have one I can take a look at for reference. I have found single EZBoil/pump/dual element diagrams but nothing that has what I listed above. And it appears P-J's diagrams are off limits.

 

[BitterSweetBrews]

Sorry, I looked at the picture again. Given these are bus bars and not terminal blocks you won't need as many connection spots. 8-10 should be fine. I have 8 or 10 circuit terminal blocks and use every one. With terminal blocks each screw column is independent from the one next to it. To get them on the same circuit you have to jumper them together.

 

[WhiteArmadilloBrewing]

Ok cool. I bought these because, as I understood it, if you bring hot/neutral/ground to one terminal then the entire bar can jump off of that one lead connection. If so then aren’t the small 5circuit ones really capable of handling 9 other connections?

 

[lschiavo]

I don't see any voltage rating on those.

I used these: http://www.elecdirect.com/power-distribution-blocks/single-primary-multiple-secondary

 

[WhiteArmadilloBrewing]

They’re rated for 100amps

 

[lschiavo]

They’re rated for 100amps

I noticed that but I couldn't find a voltage rating. I'm guessing they are a marine type device rated for 12VDC. They would probably work but you would be better off with 250VAC rated components since that is the voltage you will be using.

 

[lschiavo]

I'm a bit sceptical of the warning too

And the dimensions while we're at it...

 

[WhiteArmadilloBrewing]

hahahaha! I didn't even notice that lol. I found these voltage spec on their website: 300V AC / 48V DC