Tentative Interim Amendment (TIA) Log #1282 to NFPA 70, National Electrical Code, 2017 edition, revises Sec. 700.10(D)(1)(3). The comment closing date on this TIA is Sept. 14, 2017.
As noted in the substantiation section of this TIA:
“Article 700.10(D) was revised in the 2017 cycle in an effort to make the Article more user friendly. However, paragraph 700.10 (D)(1)(3) of the final version is missing a key safety driven component discussed during both the First and Second Draft meetings; i.e. the requirement that a listed fire-resistance cable system is rated for 2 hours. This 2-hour fire rating is a critical part of the requirement and was inadvertently missed by the Technical Committee.”
It goes on to say that this language is similar in Articles 695 and 708 and the proposed TIA seeks to amend paragraph 700.10(D)(1)(3) to be identical to 708.10(C)(2)(2).
As outlined in a portion of the Emergency Nature section of this TIA:
“Many wiring products have a listed fire resistance rating, but not all have a 2-hour fire resistance rating. As written, 700.10(D)(1)(3) permits a cable with any listed fire resistance rating. This proposed TIA seeks to restore the minimum 2-hour fire rating originally intended.”
You can view the full text of the TIA on the NFPA website.
Note: A TIA is tentative because it has not been processed through the entire standards-making procedures. It is interim because it is effective only between editions of the standard. A TIA automatically becomes a public input of the proponent for the next edition of the standard; as such, it then is subject to all of the procedures of the standards-making process.
