Article 100 Definitions. Structure.

A structure is “that which is built or constructed, other than equipment”.
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A structure is “that which is built or constructed, other than equipment”.

Code Change Summary: The definition of a “Structure” has been revised for clarity.

The new definition makes it clear that a structure does NOT include “equipment”.

This change is important for uniform enforcement of the NEC®. Structures supplied with electricity are often required by code to have grounding electrode systems, disconnecting means and sometimes even an intersystem bonding terminal.

Prior to this clarification, the following items may have been misinterpreted as a structure:

Below is a preview of Article 100. See the actual NEC® text at NFPA.ORG for the complete code section. Once there, click on their link to free access to the 2017 NEC® edition of NFPA 70.

2014 Code Language:

Structure: That which is built or constructed.

2017 Code Language:

Structure:  That which is built or constructed, other than equipment. (CMP-1)

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Article 100 Definitions. Structure.

Below is a Real Question from our Electrical Continuing Education Courses for Electrical License Renewal:

Which of the following is a structure?

A: Freestanding electrical switchgear.
B: A covered parking canopy supplied with electricity for lighting.
C: A switch mounted on a freestanding 4x4 post.
D: Freestanding electrical equipment associated with a well pump.
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