Communication grounding Equipment. Separate Ground Rod WRONG!?

[Fordean]

It guy wants to run a Dedicated ground rod from communication equipment to outside of building. I am always under the Assumption that you must ground to GEC/Building steel. But for better system back to service that serves equipment, at least. (Not a separate ground source as in a Ground rod just for equipment only).

Question is the separate ground rod would unbalance?

 

[infinity]

By communication equipment are you referring to racks and possibly cable tray or something else?

 

[K8MHZ]

It guy wants to run a Dedicated ground rod from communication equipment to outside of building. I am always under the Assumption that you must ground to GEC/Building steel. But for better system back to service that serves equipment, at least. (Not a separate ground source as in a Ground rod just for equipment only).

Question is the separate ground rod would unbalance?

The code requires that all grounding systems be bonded together.

The GEC connection for communications systems is covered under 800.100(B)

 

[gndrod]

It guy wants to run a Dedicated ground rod from communication equipment to outside of building. I am always under the Assumption that you must ground to GEC/Building steel. But for better system back to service that serves equipment, at least. (Not a separate ground source as in a Ground rod just for equipment only).

Question is the separate ground rod would unbalance?

Depends on the "communication" system being interfaced. Powered Broadband Network Interface Unit grounding shall be connected with 6 awg to the electrode as specified in [830.100(A)] Check for length exception.

"Communication Circuits" in accordance with [800.100(B)] figure(b) is applicable to Part. V [250.94] Bonding Intersystem Terminal Bar (ITB) grounding in relation to the Communication equipment. [800.156] Coax shield equipment bonding (eg. Service provider demarcation point)
Note that the NEC Figure 800(b) is missing the ITB for the equipment bonding.

 

[iwire]

The code requires that all grounding systems be bonded together.

Yes and no.

Fordean, first and foremost no mater what you add you have to have all the code required grounding and bonding done.

Now if that is complete and you want to add additional electrodes you may.

250.54 Auxiliary Grounding Electrodes. One or more
grounding electrodes shall be permitted to be connected to
the equipment grounding conductors specified in 250.118
and shall not be required to comply with the electrode
bonding requirements of 250.50 or 250.53(C) or the resistance
requirements of 250.53(A)(2) Exception, but the
earth shall not be used as an effective ground-fault current
path as specified in 250.4(A)(5) and 250.4(B)(4).

 

[ceb58]

Some where you will find that the grounding system was also installed to Motorola's R-56 grounding standard. No where dose it allow an non- interconnected grounding elect.
Also you will find there is a line that when the IT guys cross it they get real dumb:dunce:

 

[WIMaster]

I would make him happy by giving him his own ground rod then bonding it to the rest of the grounding electrode system.
Most people think that if it contacts the ground it is good enough and do not have a concept of what soil conditions and many other factors have to do with being EFFECTIVELY grounded or the many safety reasons why it is needed. so make them happy and comply with the codes.