What length of cables for patch panels and switches?

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eduncan911

The New James Dean
Jul 27, 2015
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eduncan911.com
Searched quite a while for this, but failed...

What are the ideal lengths for Cat6/Cat6a and OM3 10G fiber for 1U to 1U spacing (no blank panels)? 6in (0.5ft)?

At what angle does this max out? Or, should I get a mixture of 0.5ft and 1ft cables?

Can't seem to find an answer to this. I'm about to order around 100+ cables for both my rack and for a school's network cabinet I am building up, and want to have stock in the bag.

Please don't flog me for not having additional blank spacing between the panel and switch, "for better utility access - you'll regret it!" I just don't have the room in my 1/2 rack to accommodate it across 2, or possibly 3 switches and panels (I'm hosting a friend's setup as well). I will put flexible bends in all cables behind the patch panel, to allow me to remove the panel at long lengths to access anything from behind.

I'm basically after a setup like this for RJ45:

1619136444422.png



As for fiber, I'd like to do the exact same using keystone pass-through modules. However, I am unable to find a single picture of such tight bends of, say, 0.5ft OM3/4 cables. This is telling me that it may not be a good idea to bend fiber cables that extreme, and to take them to the side. But I prefer the aesthetics of fiber-to-panel routing, as the DIY rack really doesn't have a place to route the cables from the side to the back.
 

eduncan911

The New James Dean
Jul 27, 2015
648
506
93
eduncan911.com
Found this site with some general bend radius info.


Code:
Category 5, 5e, and 6 cables: eight times the cable diameter
Fiber patch cord: ten to fifteen times the cable diameter
DAC
  24AWG: 1.5 inches (38 mm)
  26AWG: 1.3 inches (33 mm)
  28AWG: 1.0 inch (25 mm)
  30AWG: 0.9 inch (23 mm)
 
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