225.10 Wiring on Buildings (or Other Structures).

A pole mounted sign is not a building, but it is considered a structure.
Click to Enlarge
A pole mounted sign is not a building, but it is considered a structure.

Code Change Summary: Code language was added in 225.10 to include “other structures”.

The phrase “or other structures” was added in 225.10 to ensure that “other structures” (not specifically meeting the definition of a “building” in Article 100) were covered in Article 225. This article now applies to outdoor branch circuits and feeders that serve buildings “or other structures”.

Article 100 defines a “Building” as A structure that stands alone or that is cut off from adjoining structures by fire walls with all openings therein protected by approved fire doors.

Article 100 defines a “Structure” as That which is built or constructed.

All buildings are structures but not all structures are buildings.

Now it is clear that an outdoor feeder supplying a pole-mounted sign, monument sign, bridge or cell phone tower is in fact covered in Article 225.

Below is a preview of the NEC®.  See the actual NEC® text at NFPA.ORG for the complete code section. Once there, click on the “free access” tab and select the applicable year of NFPA 70 (National Electrical code).

2011 Code Language:

225.10 Wiring on Buildings.

2014 Code Language:

225.10 Wiring on Buildings (or Other Structures).

Did You Like This?   Follow us on Facebook!

Help Us Keep Our Knowledge Free!

Electrical License Renewal Facebook Logo

225.10 Wiring on Buildings (or Other Structures).

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

One of the following is NOT considered a structure. Which of the following is NOT considered a structure?

A: A building alarm system.
B: A bridge.
C: A cell phone tower.
D: A commercial building.
Please register or sign in for electrical continuing education courses.

If you were already signed in, your session probably expired, please sign back in.