As noted on the NFPA website, three Tentative Interim Amendments (TIAs) to the 2014 Edition of the National Electrical Code (NEC) were issued on August 4, 2016. The TIAs were processed by NEC Code-Making Panel No. 4 and the Correlating Committee on the NEC. The TIAs are associated with solar photovoltaic systems and interconnected electric power production sources.
The details of each TIA is as follows:
TIA 14-10 (SC 16-8-13 / TIA Log #1223)
1. Revise 690.12(2) to read as follows:
“(2) Controlled conductors shall be limited to no more than 30 volts and 240VA within 30 seconds of rapid shutdown initiation.”
TIA 14-11 (SC 16-8-14 / TIA Log #1224)
1. Delete 705.12(D)(6) in its entirety:
“(6) Wire Harness and Exposed Cable Arc-Fault Protection. A utility-interactive inverter(s) that has a wire harness or cable output circuit rated 240 V, 30 amperes, or less, that is not installed within an enclosed raceway, shall be provided with listed ac AFCI protection.”
TIA 14-12 (SC 16-8-16 / TIA Log #1234)
1. Add new 705.12(D)(2)(3)(e) to read as follows:
“(e) A connection at either end, but not both ends, of a center-fed panel board in dwellings shall be permitted where the sum of 125 percent of the power source(s) output circuit current and the rating of the overcurrent device protecting the busbar does not exceed 120 percent of the current rating of the busbar.”
All three TIAs had an effective date of August 24, 2016.
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.