Where does the electricity induced in the shield flow from a CAT6a S/FTP cable?
Edit: Snip Tyson already linked Siemons paper.

That gives a pretty good idea of the setup.

In a nutshell the mechs in the patch panel are earthed via the patch panel to the rack frame which then should be bonded to a communications earth.

Not sure what standards are worldwide, in Australia the communications earth is bonded to the electrical earth at the switchboard or earth stake.

There will be relevant standards regarding distances, cable sizes and colours and so on. Should be covered under electrical or comms standards.