Jurisdiction Over High Voltage Services

[sii]

I’ve never thought about this before and am now only because someone I know is going to work at a facility that has a high voltage service. Who has jurisdiction, as in who inspects the installation of a high voltage service?

In Nebraska, the state is the AHJ with exception of a few of the larger cities. I doubt the State would, and I know the cities don’t have the knowledge to inspect a 13,000 volt service.

The NEC also doesn’t cover anything over 600 volts, would the installation have to conform to NESC rules?

 

[david luchini]

The NEC also doesn’t cover anything over 600 volts, would the installation have to conform to NESC rules?

????. See 450.3(a), 215.2(B), Art 230 Pat VIII, Art 240 Part IX, Art 311.

 

[jim dungar]

I’ve never thought about this before and am now only because someone I know is going to work at a facility that has a high voltage service. Who has jurisdiction, as in who inspects the installation of a high voltage service?

In Nebraska, the state is the AHJ with exception of a few of the larger cities. I doubt the State would, and I know the cities don’t have the knowledge to inspect a 13,000 volt service.

The NEC also doesn’t cover anything over 600 volts, would the installation have to conform to NESC rules?

The NEC does cover voltages higher than 600V.

In our state the normal AHJ performs inspections of the higher voltages, up to 34.5kV found on campus and industrial installations.

 

[ptonsparky]

I believe if it is customer owned the SED has authority. Our local state college campus distribution is.

 

[sii]

????. See 450.3(a), 215.2(B), Art 230 Pat VIII, Art 240 Part IX, Art 311.

Ok well no part of the NEC I use covers over 600 volts. My bad.

I believe if it is customer owned the SED has authority. Our local state college campus distribution is.

Interesting. I did not know that.

 

[electrofelon]

I believe if it is customer owned the SED has authority. Our local state college campus distribution is.

What is sed?

 

[sii]

State Electrical Department

 

[augie47]

In our area, anything beyond the "service point" is NEC & State or local inspected regardless of voltage.

 

[don_resqcapt19]

The NEC does not do a very good job with medium voltage installations....they are taking a start at changing that in the 2023 code with new medium voltage articles.
In almost all case the medium voltage systems are engineered systems and a number of AHJs inspect to the design, or hire a person more qualified in medium voltage work for those inspections.

 

[petersonra]

The NEC does not do a very good job with medium voltage installations....they are taking a start at changing that in the 2023 code with new medium voltage articles.
In almost all case the medium voltage systems are engineered systems and a number of AHJs inspect to the design, or hire a person more qualified in medium voltage work for those inspections.

It seems to me that the NEC would be better off just saying it should be an engineered system and not trying to put in a bunch of design criteria into the code like they messed up the rest of the code with.