Authority: IC 22-13-2-2; IC 22-13-2-13

Affected: IC 22-12; IC 22-13; IC 22-14; IC 22-15; IC 36-7

Sec. 15. (a) Delete the text of (2) in Section 334.10 and substitute: (2) In any building or structure not exceeding three stories (see Section 362.10 for the definition of STORY).

1. (a) For exposed work except as prohibited in Section 334.12.
2. (b) Concealed within walls, floors, and ceilings except as prohibited in Section 334.12.

(b) Delete the text of (3) in Section 334.10 and substitute: (3) In any building or structure exceeding three stories (see Section 362.10 for the definition of STORY), Type NM, Type NMC, and Type NMS cables shall be concealed within walls, floors, and ceilings that provide a thermal barrier of material that has at least a 15-minute finish rating identified in listings of fire-rated assemblies. The 15-minute-finish-rated thermal barrier shall be permitted to be used for combustible walls, floors, and ceilings, except as prohibited in Section 334.12.

1. Exception: Where the building is provided with an approved automatic sprinkler system throughout, Type NM, Type NMC, and Type NMS cables are permitted to be used within walls, floors, ceilings, exposed or concealed, in buildings exceeding three stories.

(Fire Prevention and Building Safety Commission; 675 IAC 17-1.8-15; filed Jul 27, 2009, 10:39 a.m.: 20090826-IR-675090140FRA; readopted filed Jul 17, 2015, 3:40 p.m.: 20150812-IR-675140473RFA; readopted filed Jul 8, 2021, 3:18 p.m.: 20210804-IR-675210166RFA; readopted filed Nov 18, 2025, 10:36 a.m.: 20251210-IR-675240566RFA) NOTE: Agency cited as 675 IAC 17-1.8-16, which was renumbered by the Publisher as 675 IAC 17-1.8-15.