Hi there I work in a shopping centre and the tills are supplied by a chrome pole ( non standard ) that comes from a metal burgess ceiling . Inside the pole is a 2.5mm 3 core flex and a CAT6 cable (non screened ) that supplies the till . This pole does not have any earth . I’m now being asked to use an earth clamp to connect the pole to a piece of trunking above the ceiling via a 4mm cable . Question 1 is this necessary? Question 2 should the earth from clamp be connected to the same earth that is contained in this pole ? And question 3 should the CAT6 cable be installed in same containment as the power supply ?