In Errata No. 70-23-3, issued on March 24, 2023 ,the National Electrical Code Panels 6, 7, 10, 14, 15, and the NEC Correlating Committee note the following errors in the 2023 edition of NFPA 70®, National Electrical Code®.
1. In Table 225.3 delete the line as follows:
2. Correct the Table reference in section 395.30(C)(3) to read as follows:
395.30 Support.
(A) …
(C) Insulators. Insulators used to support conductors shall be rated for all of the following:
(1) Applied phase-to-phase voltage
(2) Mechanical strength required for each individual installation
(3) Impulse withstand BIL in accordance with Table 490.24(a) 495.24
Informational Note: See 395.30(A), (B), and (C), which are not all-inclusive lists.
3. In section 501.15(D) revise the reference to read as follows:
501.15 Sealing and Drainage. …
(A) …
(D) Cable Seals, Class I, Division 1. In Division 1 locations, cable seals shall be located according to 501.15(D)(2) 501.15(D)(1) through (D)(3).
(1) At Terminations. …
(2) Cables Capable of Transmitting Gases or Vapors. …
(3) Cables Incapable of Transmitting Gases or Vapors. …
4. In section 513.7(F) revise the second warning to read as follows:
5. In section 513.10(B) delete the duplicate clearance warning as follows:
6. In section 517.71(C) revise to read as follows:
517.71 Connection to Supply Circuit.
(A) …
(B) …
(C) Over 1000 Volt Supply. Circuits and equipment operated on a supply circuit of over 1000 volts shall comply with Parts I through IV of Article 490 495.
7. In section 550.18(B)(3) revise the reference to read as follows:
550.18 Calculations. …
(A) …
(B) Total Load for Determining Power Supply. …
(1) …
(2) …
(3) Twenty-five percent of current of largest motor in Table 550.18(B) 550.18(B)(2).
For more information, read the full errata.
