Bonding of CATV drop to electrical raceway

[sheasty]

I have been given a challenge of finding out why CATV cannot bond to the power mast above the power meter. I currently use the Jones-NCTI installation manual as a training manual which states it is OK to bond both above and below the meter. I was told we can no longer bond above. I am looking for the NEC that references that in particular. I teach only to bond at the load side of the meter. Can anyone help??

 

[brantmacga]

first, who told you where you couldn't and could not bond? was it a power company?

 

[raider1]

There has been a change in the 2008 NEC that requires an intersystem bonding termination. Here is what the 2008 NEC requires for an intersystem bonding termination:

250.94 Bonding for Other Systems.
An intersystem bonding termination for connecting intersystem bonding and grounding conductors required for other systems shall be provided external to enclosures at the service equipment and at the disconnecting means for any additional buildings or structures. The intersystem bonding termination shall be accessible for connection and inspection. The intersystem bonding termination shall have the capacity for connection of not less than three intersystem bonding conductors. The intersystem bonding termination device shall not interfere with opening a service or metering equipment enclosure. The intersystem bonding termination shall be one of the following:
(1) A set of terminals securely mounted to the meter enclosure and electrically connected to the meter enclosure. The terminals shall be listed as grounding and bonding equipment.
(2) A bonding bar near the service equipment enclosure, meter enclosure, or raceway for service conductors. The bonding bar shall be connected with a minimum 6 AWG copper conductor to an equipment grounding conductor(s) in the service equipment enclosure, meter enclosure, or exposed nonflexible metallic raceway.
(3) A bonding bar near the grounding electrode conductor. The bonding bar shall be connected to the grounding electrode conductor with a minimum 6 AWG copper conductor.

To go along with that a change in 820.100 requires that if the building has an intersystem bonding termination then you must connect your grounding conductor to that termination point. Here is the new wording in 820.100:

(B) Electrode. The grounding conductor shall be connected in accordance with 820.100(B)(1), (B)(2), or (B)(3).
(1) In Buildings or Structures with an Intersystem Bonding Termination. If the building or structure served has an intersystem bonding termination, the grounding conductor shall be connected to the intersystem bonding termination.

If you have a building that does not have an intersystem bonding termination then you are permitted to use the following to connect the grounding conductor:

(2) In Buildings or Structures with Grounding Means. If the building or structure served has no intersystem bonding termination, the grounding conductor shall be connected to the nearest accessible location on the following:
(1) The building or structure grounding electrode system as covered in 250.50
(2) The grounded interior metal water piping system, within 1.52 m (5 ft) from its point of entrance to the building, as covered in 250.52
(3) The power service accessible means external to enclosures as covered in 250.94
(4) The metallic power service raceway
(5) The service equipment enclosure
(6) The grounding electrode conductor or the grounding electrode conductor metal enclosure, or
(7) The grounding conductor or the grounding electrode of a building or structure disconnecting means that is connected to an electrode as covered in 250.32

Chris

 

[480sparky]

In my neck of the woods, anything above the meter is called the riser, and cannot have anything attached to it other than the service drop.

No telephone, cable tv, satellite dishes, etc.

This is POCO requirement, not an NEC issue.

 

[sheasty]

CATV bonding

CATV bonding

In some cases the power companies tell us where we can and cannot bond. In this particular case, a former trainer and corporate management person informed me we cannot bond above the meter base. Our Technical Operations Manager has challenged that.