- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Does this wording look correct to you. I never noticed it before --
230.70
- Thread starter Dennis Alwon
- Start date
- Status
fmtjfw
Senior Member
- Location
- Fairmont, WV, USA
Yep, and it includes unbolting the GEC, maybe.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
I would not consider the grounding electrode conductor as a service conductor
chris kennedy
Senior Member
- Location
- Miami Fla.
- Occupation
- 60 yr old tool twisting electrician
Is there an exception for the grounded conductor? Not by book.
fmtjfw
Senior Member
- Location
- Fairmont, WV, USA
If the GEC is connected in the meter socket or CT cabinet, then the grounded conductor which is a service conductor serves to also conduct any current from the GEC.
al hildenbrand
Senior Member
- Location
- Minnesota
- Occupation
- Electrical Contractor, Electrical Consultant, Electrical Engineer
Many large switchboards will have a small piece of buss bar that is labeled as the disconnect and can be unbolted for this.
Roger
- Location
- Massachusetts
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
So it seems like 230.70 says one thing and 230.75 says the other. We all know we never had to disconnect the grounded conductor but IMO, this section should be changed to say all ungrounded service conductors no all service conductors.
It is confusing to have to go to 2 different sections when that can be given in one. 230.75 can stay but 230.70 needs a re-write, IMO
It is confusing to have to go to 2 different sections when that can be given in one. 230.75 can stay but 230.70 needs a re-write, IMO
NYSolar
Member
- Location
- Rensselaer, NY. Rensselaer County
the definition of service in NEC is coductors supplying power. Definition of service conductors is conductors from the service point to the disconnecting means. So in the definition of service conductors do they mean just conductors supplying power?
Guess I'm lost. Seems 230.75 simply supplements 230.70.
230.70 requires disconnecting of all service conductors and 230.75 allows an optional (and most often used) method of disconnecting the grounded conductor.
230.70 requires disconnecting of all service conductors and 230.75 allows an optional (and most often used) method of disconnecting the grounded conductor.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
That's correct but it should be stated in the same section, IMO. You red 230.70 then there should be an exception for the grounded conductor. or 230.70 should just state ungrounded service conductors. It would just be easier to understand rather than have to go to 2 places.
I agree, 230.75 just makes it clear that if the disconnecting means described in 230.70 does not open the grounded conductor there are other methods of doing it.
Roger
- Location
- Placerville, CA, USA
- Occupation
- Retired PV System Designer
Part of the problem may be that we see "Service Equipment Disconnecting Means" and our thoughts go immediately to the Service Disconnect which includes the main OCPD. We are not primed to think of multiple disconnects working together for the purpose of this section. In particular this portion does not relate to overcurrent protection, which is not needed for the grounded conductor.
- Location
- Massachusetts
You would disconnect it if you where doing insulation testing.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
I was referring to a service install where we never switch the neutral unless it is a separately derived system.
On another note-- how would one connect a neutral to a service and not have it capable of being disconnected. It seems a round about way to say that you don't have to switch the grounded conductor. Again what situation would not satisfy this section-
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
I agree it is clear Roger , I am saying it seems round about and sloppy to say it this way
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