Grounding/Bonding question

[guttapercha]

Hello,
I need to bond to the metal raceway of my service entrance. (#4 in attached image). Does anyone know if there is a UL listed clamp for this purpose?
I do not have access to the grounding electrode system. The main disconnect is terminated to an Ufer that I do not have access to.
Thank you,
Josh

 

[AK9R]

I don't think that the metal raceway, aka "conduit", on the power company's side of meter box is grounded to anything. As shown in the diagram, it passes 2 hots and a neutral, but no ground. Inside the service entrance, main disconnect, or breaker panel, the neutral and ground are bonded.

Do you have access to the service entrance, main disconnect, or breaker panel?

 

[sdu219]

this is what you need. Yes the meter panel is grounded via the conduit and or a ground rod

 

[sdu219]

even if its pvc the meter socked in grounded. Follow ground wire from panel to UFER it has to be accessible. if not punch out knock out on bottom of panel and use the above pictured grounding grenade

 

[sdu219]

1/2 in. Inline Intersystem Bonding Bridge Connector $17 at Home Depot
I am licensed in MASS

 

[ka3aaa]

its already bonded / grounded by the threaded mechanical connection to the electric meter base which is also bonded / grounded with the ground rod and main panel, so no further action required.

 

[guttapercha]

Thank you all for the info! Here's the layout:
Underground power via metal raceway --> Meter-- > Main disconnect (connected to meter via very short metal raceway) --> breaker panel (about 20 ft from main disconnect).

In the breaker panel, there are 3 insulated conductors and one braided conductor coming in from the main disconnect. I have not opened up the main disconnect panel yet, but I gather that the main disconnect has a connection to the GEC, which should be an UFER given the construction in this area (and the lack of a ground rod).

The shack is naturally at the other end of the house

 

[ka3aaa]

ground rods are required by the NEC.

what does UFER and GEC stand for???????????????????

 

[mmckenna]

A UFER ground is a concrete encased ground rod. In many newer homes, the concrete reinforcement bar is used as the ground. It works better in some dry soils than a traditional ground rod would. It's acceptable to use that as the ground.

GEC is Grounding Electrode Conductor. It's essentially the wire that connects to the ground.

 

[guttapercha]

1/2 in. Inline Intersystem Bonding Bridge Connector $17 at Home Depot
I am licensed in MASS

Hi again - really appreciate your help.

The box for my main disconnect is pictured below, with the service entering at the lower right. The box does not have any 1/2" punchouts that I can see. Can you please advise how to bond?

All the best,

Josh

 

[ka3aaa]

i see a ground on the nut for the conduit that is attached to a copper #6 wire that is probaly connected to the grounding strap in the main disconnect besides the neutral connector lugs, where and or what do think you need to bond.

 

[guttapercha]

i see a ground on the nut for the conduit that is attached to a copper #6 wire that is probaly connected to the grounding strap in the main disconnect besides the neutral connector lugs, where and or what do think you need to bond.

I need to bond the grounding rod that I have for the shack. Plan is to bury 6 g wire and run over to the main disconnect per the figure in the first post. I'm now thinking I could just drill a 1/2" hole in the bottom of this box and use that intersystem bonding bridge that was mentioned by sdu219.
Thanks,
Josh

 

[ka3aaa]

if you have copper water piping just ground to that and you will be fine, but your shack is already grounded thru the electrical system, or just run a seperate ground wire thru the house wall and use the new ground rod and dig a trench about a foot deep as long as the ground rod and lay that horizontal in the trench.

 

[mmckenna]

if you have copper water piping just ground to that and you will be fine, but your shack is already grounded thru the electrical system, or just run a seperate ground wire thru the house wall and use the new ground rod and dig a trench about a foot deep as long as the ground rod and lay that horizontal in the trench.

Using the ground conductor on the outlets in the room is not sufficient for antenna/mast grounding.
Bonding all the grounds together is required by NEC.

As always, it's good to contact an experience/licensed electrician if you are not sure.

 

[WA8ZTZ]

As always, it's good to contact an experience/licensed electrician if you are not sure.

There are probably several good ways and even more bad ways to try to accomplish your objective.
Without actually seeing your particular installation it is hard to make a recommendation as to how to properly proceed.
It would be best to seek the help of a licensed electrician experienced in these matters.