Hello, may I ask, what norms do you have on the shelf?
The diameter of the protective tube depends on all the cross-sectional area of the cable. It is usually required that the total cross-sectional area of the cable passing through the cable can not be greater than two-thirds of the area of the hole in the protective tube.
Under normal circumstances it is better to do jumper. That is, all the switches of the telecommunications signal to do a patch panel and then your own line to do another patch panel above, when the signal when the jumper from the telecommunications patch panel to your users wiring Shelves on it, do not have to just remove the line on it.
Look at the cable diameter, casing diameter to take the cable diameter of 1.5 times it This is not a certain rule, but 1.5 times in many reference books are mentioned.
