How to ground a server rack?

Question

Server equipment

Good afternoon.
There is a rack, in it two servers, UPS, 4 cisco.
Can you tell me how to properly ground this rack?
220V (3-wire wire) was stretched into the room.
Correctly, I understand that you need to put a bus in the rack, ground everything to it, but how to connect the bus itself to ground? Ask electricians to run a separate ground wire from the shield?
Thank you.

Answer 1

Bring everything that is grounded to the bus (i.e., has a ground bolt), connect the bus itself to the common grounding system of the building.

Answer 2

220V (3-wire wire) was stretched into the room.

One of them must be ground.
In a good way, there should be a third contact
in the socket Either the mustache at the socket must be grounded
And the plug we are used to has a counterpart, which eventually goes to the case in the devices.

Answer 3

Correctly, I understand that you need to put a bus in the rack, ground everything to it, but how to connect the bus itself to ground?

Ground - no way! Zeroing only. Only. In addition to the middle power wire, the rack must be separately connected to a special grounding circuit. In case of a break in the neutral wire or phase imbalance (when zero burns out).

Ask electricians to run a separate ground wire from the shield?

Exactly! Thus, you will relieve yourself of responsibility in which case. You don't have the proper clearance, but there are electricians who do. Share responsibility. Make one less headache.
Tell the electricians the approximate power consumption of your rack, taking into account that during startup, the UPS can consume a lot of peak power (three times easily). They should estimate the cable section for this power.