Service Entrance Conductor

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FaradayFF

Senior Member
Location
California
Greetings,

For industrial facilities, where switchgear in one building can supply MCC in another building, would the feeder from switchgear building to MCC building be considered service entrance conductors.
What is your interpretation of this scenario. I encounter this on a regular basis now, was just wondering if NEC rules regarding sizing of supply conductors and grounded conductor apply in this scenario.

Thanks,
EE
 

david luchini

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Staff member
Location
Connecticut
Occupation
Engineer
Greetings,

For industrial facilities, where switchgear in one building can supply MCC in another building, would the feeder from switchgear building to MCC building be considered service entrance conductors.
What is your interpretation of this scenario. I encounter this on a regular basis now, was just wondering if NEC rules regarding sizing of supply conductors and grounded conductor apply in this scenario.

Thanks,
EE

No, that would be a feeder, not service entrance conductors. See Art. 225, Part II and Art 430, Part VIII.
 

infinity

Moderator
Staff member
Location
New Jersey
Occupation
Journeyman Electrician
If the conductors in the switchgear in building A is supplying building B after the service disconnect then as David stated the conductors are feeders. If they're before the service disconnect then they could be SEC's.
 

charlie b

Moderator
Staff member
Location
Lockport, IL
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Retired Electrical Engineer
A simple way to look at it is if the thing upstream of the conductor under consideration is the electric utility, then (and only then) is it a service conductor.
 
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