GEC connection must be continuous or connection should be made with exothermic or irreversible connectors. But if I use a copper ground bus bar, a listed connector or by the exothermic welding.
What would be the listed connector to the copper ground busbar?
250.24 Grounding Service-Supplied Alternating-Current
Systems.
(A) System Grounding Connections. A premises wiring
system supplied by a grounded ac service shall have a
grounding electrode conductor connected to the grounded
service conductor, at each service, in accordance with
250.24(A)(1) through (A)(5).
(1) General. The grounding electrode conductor connection
sha]] be made at any accessible point from the load end
of the overhead service conductors, service drop, • underground
service conductors, or service lateral to, including
the terminal or bus to which the grounded service conductor
is connected at the service disconnecting means.
Can you not run a GEC from the grounded conductor terminal bus (or equipment grounding terminal bus if bonded) to a ground bus bar, then GE per 250.64(c)?Can you run a GEC to a bus bar?
Can you not run a GEC from the grounded conductor terminal bus (or equipment grounding terminal bus if bonded) to a ground bus bar, then GE per 250.64(c)?
(1) General. The grounding electrode conductor connection
shall be made at any accessible point from the load end
of the overhead service conductors, service drop, • underground
service conductors, or service lateral to, including
the terminal or bus to which the grounded service conductor
is connected at the service disconnecting means.
I am not sure on this.
I don't see that 250.64(C) changes the requirements of 250.24
Maybe I am missing something but that does not sound to me like the GEC can run to a bus bar outside the service disconnect.
I don't think 250.64(c) changes the requirements of250.24. The GEC is still connected to the grounded service conductor at the service disconnect..the GEC is spliced at the bus bar instead of continuous. That's how I read this. Do you not agree?
I am reading that 250.24 tells us one end of the GEC has to run directly into the service disconnect.
Again, maybe I am missing something. Wait for some others to jump in.
Ground bar internal or external to enclosure? More than one enclosure? Service or building feeder disconnecting means?Can you not run a GEC from the grounded conductor terminal bus (or equipment grounding terminal bus if bonded) to a ground bus bar, then GE per 250.64(c)?
let's assume this is a tap to GEC, is there a such thing as listed connector to copper bus bar that you know of?
Ground bar internal or external to enclosure? More than one enclosure? Service or building feeder disconnecting means?
Please elaborate on your scenario. Sometimes I get the feeling posters leave out specific information so as to influence the response. Not saying that's always true, but I am getting that feeling.
If this ground bar is external to more than one disconnecting means enclosure and this is a common GEC and taps scenario, yes this is permitted without irreversibe connections.
Connection of wire-type GEC to a compliantly-installed busbar can be made using any terminal that is listed for grounding. IIRC compression terminals and your typical mechanical lug are so listed.
If you only have one service disconnect enclosure, I agree with Bob that you can't use the bus bar to splice the GEC.(D) Building or Structure with Multiple Disconnecting Means in Separate Enclosures. ...
Note that per the title of 250.64(D), that section only applies where there are multiple service disconnects.
If you only have one service disconnect enclosure, I agree with Bob that you can't use the bus bar to splice the GEC.
If you have multiple service disconnect enclosures, you can run the GEC to a busbar and run taps to the enclosures.
You have a grounding electrode conductor of the wire type so only 250.64(C)(1) applies.Then when does 250.64(C) (1) thru (4) apply? It says splices are permitted if necessary. I am confused..
You have a grounding electrode conductor of the wire type so only 250.64(C)(1) applies.
When your grounding electrode conductor is busbar.Then when can you apply 250.64(C)(2)?
When your grounding electrode conductor is busbar.
The difference between the GEC being busbar and your use is that the busbar is a means of splicing, not as the GEC itself. You have wire-type GEC running to it and wire-type GEC running from it.
I have never seen GEC as a busbar, but I guess you could run a busbar from the building steel to the service equipment where you are using the building steel as the grounding electrode.Hmm..All these years, I never read this section that way..Well I stand corrected.
I am curious, how can the GEC be a busbar?
I don't think anybody ever read that section that way until your question came up on this forum.Hmm..All these years, I never read this section that way..Well I stand corrected.
I am curious, how can the GEC be a busbar?