Code Quiz: Wiring Requirements in Stair Enclosures

Test your knowledge of the NEC with this challenging question.

Aug. 4, 2022

Based on the 2020 NEC.

Question: Are there any restrictions on wiring contained within an exit stair tower?

See answer below.

Answer: Yes

Explanation: Section 300.25 of the NEC limits wiring within exit stair enclosures to only what is necessary to serve equipment associated with the stair enclosure. This is a new requirement in the 2020 NEC but has been previously required by the NFPA 101, Life Safety Code NFPA, Sec. 7.1.3.2.1(10)(b).

Lupacchino is a senior design engineer with Gaylor Electric, Inc. in Noblesville, Ind. and serves as an alternate on NEC Code-Making Panel No. 3. He is currently licensed in more than 80 jurisdictions. He can be reached at [email protected].

About the Author

John Lupacchino

Senior Design Engineer

John began his career in electrical construction as an apprentice and worked his way through the trade. He is currently licensed in more than 80 jurisdictions. With more than 35 years of experience, he now plays a vital role in Gaylor Electric’s Engineering Department, where he serves as a senior design engineer. With a focus on design engineering, quality assurance, and code compliance, he has earned the highest level of respect from industry professionals alike. John currently serves as an alternate on NFPA 70 Code Making Panel No. 3. In addition, he enjoys sharing his electrical knowledge through education. As an Associated Builders and Contractors instructor, he continues to help grow a new generation of high-performing construction leaders.