Where is the differentiation between service and feeder at an industrial facility?

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MRKN

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What if your point of interconnect is at the 115 kV level and the industrial facility owns 115 kV transmission lines, numerous substations, and a 12 kV distribution network?

Article 100 definition of service does not really help me here.
 
The service point is where utility owned wiring or equipment is connected to customer owned wiring or equipment. Nothing about voltage changes that. If it's 115kV at that point, then that's your service voltage.
 
jaggedben said:
The service point is where utility owned wiring or equipment is connected to customer owned wiring or equipment. Nothing about voltage changes that. If it's 115kV at that point, then that's your service voltage.
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This is the way we treat the service point at our complex. The 115kV supply at our main substation is our service point. Everything leaving the main substation to our remote primary substations are feeders and supplies into our building are separately derived systems (SDS's). It's taken a while to change the paradigm that the supplies into the buildings are not services. Developed a comparison of NEC requirements for outside feeders and SDS's to services to help explain to our engineers. Happy to share if you PM me your email.
 
The utility meters our 115kV service for billing; however we have our own metering PT's and CT's connected to CM4000's to do our own metering and to provide a sanity check of utility's data.


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sameguy said:
To me the service starts at the point the electricity starts being paid for.
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Might be the case on some smaller services. There also are many where the service starts at point of attachment for overhead services, even though the POCO has a meter beyond this point, or at the transformer or other termination point for underground services, again POCO may still have a meter beyond this point.

jaggedben said:
The service point is where utility owned wiring or equipment is connected to customer owned wiring or equipment. Nothing about voltage changes that. If it's 115kV at that point, then that's your service voltage.
Click to expand...

NEC added definition for "Service point" not too long ago. You mostly summed up what it is.
 
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