1、Accredited Standards Committee C2-2017 13 September 2016 1 Insert to STDPT20924 Errata to 2017 Edition National Electrical Safety CodeCorrection Sheet Issued 13 September 2016 The following corrections should be made: Foreword Page iii: In the 2017 Edition subsection of the Foreword, change the firs
2、t sentence of the seventh paragraph as follows: Guy insulator Rule 215C2 to Rule 215C8 of the 2012 edition were rewritten and reorganized to make them easier to understand and apply with the voltage transfer rules associated with guy insulators being removed. NESC Main Committee Membership Page viii
3、: In the second column of the NESC Main Committee list, change the header to “Principal.” NESC Subcommittee 1 Page ix: In the first column of the NESC Subcommittee 1 list, change the header to “Principal.” Page ix: At the bottom of the page, change the names of the following organizations: NCTANatio
4、nal Cable . . .”) of Table 234-1(m), change Footnote 14 to Footnote 16. Page 142: In the sixth column of the header row (“Unguarded rigid live parts, over 750 V to 22 kV; . . .”) of the continued Table 234-1(m), change Footnote 14 to Footnote 16. Page 143: In the sixth column of the header row (“Ung
5、uarded rigid live parts, over 750 V to 22 kV; . . .”) of the continued Table 234-1(m), change Footnote 14 to Footnote 16. Page 145: In the fourth column of the header row (“Unguarded rigid live parts, 0 to 750 V; . . .”) of Table 234-1(ft), change Footnote 14 to Footnote 16. Page 146: In the fourth
6、column of the header row (“Unguarded rigid live parts, 0 to 750 V; . . .”) of the continued Table 234-1(ft), change Footnote 14 to Footnote 16. Page 147: In the fourth column of the header row (“Unguarded rigid live parts, 0 to 750 V; . . .”) of the continued Table 234-1(ft), change Footnote 14 to F
7、ootnote 16. Page 156: Change the reference below the Table 234-6(m) caption as follows: Table 234-6Clearance over roof not readily accessible See Rule 234C3d(1). Page 157: Change the reference below the Table 234-6(ft) caption as follows: Table 234-6Clearance over roof not readily accessible See Rul
8、e 234C3d(1). 235. Clearance for wires, conductors, or cables carried on the same supporting structure Page 160: In Rule 235C1, delete “and” as follows: Basic clearance for line wires, conductors, cables, and service drops of same or different circuits Section 24. Grades of construction 242. Grades o
9、f construction for conductors Page 201: In Footnote 3 of the continued Table 242-1, delete “not” as follows: Grade C construction may be used if the supply circuits will be promptly de-energized, both initially and following subsequent breaker operations, in the event of a contact with lower supply
10、conductors or other grounded objects. Accredited Standards Committee C2-2017 13 September 2016 10 Insert to STDPT20924 243. Grades of construction for line supports Page 202: In Rule 243A3, change the reference from Rule 241C3b to Rule 241C4b. Page 202: In Rule 243B3, change the reference from Rule
11、241C3b to Rule 241C4b. Page 202: In Rule 243C3, change the reference from Rule 241C3b to Rule 241C4b. Section 26. Strength requirements 260. General (see also Section 20) Page 226: In Rule 260A2, change the reference from Rule 13A2 to Rule 013A2. Page 226: In Rule 260B1 NOTE 2, change the bibliograp
12、hic reference numbers as follows: PCI Design Handbook: Precast and Prestressed Concrete B51 IEEE Std 751-1991, IEEE Trial-Use Design Guide for Wood Transmission Structures B32 The Aluminum Association, Aluminum Design Manual B52 261. Grades B and C construction Page 234: In Rule 261N, change the bib
13、liographic reference number as follows: IEEE Std 1307-2004 B37 Section 27. Line insulation 279. Guy and span insulators Page 244: In the NOTE of Rule 279A2a, change the reference from Rule 215C7 to Rule 215C4. Accredited Standards Committee C2-2017 13 September 2016 11 Insert to STDPT20924 Part 3. S
14、afety Rules for the Installation and Maintenance of Underground Electric Supply and Communication Lines Section 35. Direct-buried cable and cable in duct not part of a conduit system 355. Additional rules for duct not part of a conduit system Page 270: In Rule 355D, delete “a” from the first sentenc
15、e as follows: The portion of duct installed through an exterior building wall, floor, or roof shall have seals inside the duct and external seals on the outside surface of the duct at the point of entry into the building intended to limit the likelihood of the entrance of gas into the building. Accr
16、edited Standards Committee C2-2017 13 September 2016 12 Insert to STDPT20924 Part 4. Work Rules for the Operation of Electric Supply and Communications Lines and Equipment Section 41. Supply and communications systemsRules for employers 410. General requirements Page 278: In Rule 410A3, third paragr
17、aph, change the bibliographic reference number as follows: Neal, Bingham, and Doughty B45 Page 278: In Rule 410A3 EXCEPTION 4, change the text as follows: Arc-rated equipment is not necessary for the employees head or face when the employee is wearing head protection meeting OSHA 29 CFR 1910.135 B48
18、 if the estimated incident energy is less than 9 cal/cm2for exposures involving single phase arcs in open air less than or 5 cal/cm2for other exposures. Arc-rated equipment is necessary for the protection of the employees head and face and may consist of head protection meeting OSHA 29 CFR 1910.135
19、and a face shield with a minimum arc rating of 8 cal/cm2if the estimated incident-energy exposure is greater than 9 cal/cm2and less than 13 cal/cm2for exposures involving single-phase arcs in open air or greater than 5 cal/cm2and less than 9 cal/cm2for other exposures. For exposures involving single
20、 phase arcs in open air, the arc rating for the employees head and face protection may be 4 cal/cm2less than the estimated incident energy. Page 279: In Rule 410A3 EXCEPTION 5, change the text as follows: For dc systems with voltages from 50 V to 250 V and 8000 A maximum fault current, in lieu of pe
21、rforming an arc hazard analysis, clothing with a minimum effective arc rating of 5 cal/cm2shall be used. Page 279: In Rule 410A3 NOTE 1, change the bibliographic reference number as follows: Doan, “Arc Flash Calculations for Exposures to DC Systems” B24 Page 279: In Rule 410A6 NOTE, change the bibli
22、ographic reference numbers as follows: OSHA 29 CFR 1910.97, Subpart G B47 OSHA 29 CFR 1910.268, Subpart R B49 FCC Bulletin No. 65 B26 IEEE Std C95.1-2005 B44 Pages 280 and 281: In the footnotes to Table 410-1, change the bibliographic reference numbers in Footnotes 6, 9, 11, 12, and 13 as follows: E
23、blen and Short B25 Accredited Standards Committee C2-2017 13 September 2016 13 Insert to STDPT20924 Section 42. General rules for employees 423. Underground line operating procedures Page 291: In Rule 423D2 NOTE and Rule 423D3 NOTE, change the bibliographic reference numbers as follows: IEEE Std 133
24、3-1994 B38 Section 44. Additional rules for supply employees 441. Energized conductors or parts Page 296: In Rule 441A1d NOTE 2, change the bibliographic reference number as follows: OSHA 29 CFR 1910.269 Appendix B B50 Page 296: In NOTE 3 of Rule 441A1d, add the bibliographic reference number after
25、the citation of ANSI C84.1-1995 as follows: NOTE 3: The voltage ranges are contained in ANSI C84.1-1995, Table 1 B7. Page 297: In Rule 441A4 NOTE 2, change the bibliographic reference number as follows: OSHA 29 CFR 1910.269 Appendix B B50 Page 301: In Table 441-1, change the bibliographic reference
26、number in Footnote 7 as follows: OSHA 29 CFR 1910.269 Appendix B B50 444. De-energizing equipment or lines to protect employees Page 314: In Table 444-1, change the bibliographic reference number in Footnote 3 as follows: IEEE Std C37.30.1-2011 B40 445. Protective grounds Page 315: In Rule 445B3 NOT
27、E 2, change the bibliographic reference number as follows: IEEE Std 1048-1990 B34 IEEE Std 1246-2002 B36 Accredited Standards Committee C2-2017 13 September 2016 14 Insert to STDPT20924 Appendix A Uniform system of clearances adopted in the 1990 edition Page 322: In the first item of the unordered l
28、ist, change the reference from Rule 232C2a to Rule 233C2a as follows: Voltages in the tables are limited to 0 V to 750 V and over 750 V to 22 kV, normal secondary and primary distribution ranges respectively. Voltages in the 22 kV to 50 kV range are covered by a 10 mm per kV (0.4 in per kV) adder; s
29、ee Rules 232C1a, 233C2a, and 234G1. Exceptions at 22 kV to 50 kV are noted where they apply. Accredited Standards Committee C2-2017 13 September 2016 15 Insert to STDPT20924 Appendix D Determining maximum anticipated per-unit overvoltage factor (T) at the worksite Page 341: In the fourth paragraph o
30、f item 1a, change the bibliographic reference number as follows: IEEE Std 519-1992 B30 Accredited Standards Committee C2-2017 13 September 2016 16 Insert to STDPT20924 Appendix E Bibliography Page 342: In Appendix E (Bibliography), insert Footnote 2 and Footnote 10 to the locations of citation for B
31、1.1Page 342: In Appendix E (Bibliography), change the year from 2011 to 1995 in B7. Page 342: In Appendix E (Bibliography), insert Rule 260B1 NOTE 2 as the location of citation for B12. Page 343: In Appendix E (Bibliography), delete references B24 to B27. Page 343: In Appendix E (Bibliography), renu
32、mber B28 as B24 and change the location of citation from Rule 410A3a EXCEPTION to Rule 410A3 NOTE 1. Page 343: In Appendix E (Bibliography), renumber B29 as B25 and insert Footnote 6 to the locations of citation. Page 343: In Appendix E (Bibliography), renumber B30 as B26 and change the location of
33、citation from Rule 420Q NOTE to Rule 410A6 NOTE. Page 343: In Appendix E (Bibliography), renumber B31 and B32 as B27 and B28. Page 343: In Appendix E (Bibliography), delete B33. Page 343: In Appendix E (Bibliography), renumber B34 as B29. Page 344: In Appendix E (Bibliography), renumber B35 and B36
34、as B30 and B31. Page 344: In Appendix E (Bibliography), delete B37. Page 344: In Appendix E (Bibliography), renumber B38 and B39 as B32 and B33. Page 344: In Appendix E (Bibliography), delete B40 to B46. Page 344: In Appendix E (Bibliography), renumber B47 as B34. Page 344: In Appendix E (Bibliograp
35、hy), delete B48 to B50. Page 344: In Appendix E (Bibliography), renumber B51 as B35. Page 344: In Appendix E (Bibliography), renumber B52 as B36 and delete Rule 223A4 from the locations of citation. Page 344: In Appendix E (Bibliography), renumber B53 and B54 as B37 and B38. Page 345: In Appendix E
36、(Bibliography), renumber B55 as B39 and insert Rule 223A NOTE as the location of citation. 1See page 18 of this errata sheet for the complete updated bibliography. Accredited Standards Committee C2-2017 13 September 2016 17 Insert to STDPT20924 Page 345: In Appendix E (Bibliography), renumber B56B59
37、 as B40B43. Page 345: In Appendix E (Bibliography), renumber B60 as B44 and change the location of citation from Rule 420Q NOTE to Rule 410A6 NOTE. Page 345: In Appendix E (Bibliography), delete B61. Page 345: In Appendix E (Bibliography), renumber B62 as B45 and change the location of citation from
38、 Rule 410A3 NOTE to Rule 410A3. Page 345: In Appendix E (Bibliography), delete B63. Page 345: In Appendix E (Bibliography), renumber B64 as B46. Page 345: In Appendix E (Bibliography), renumber B65 as B47 and change the location of citation from Rule 420Q NOTE to Rule 410A6 NOTE. Page 345: In Append
39、ix E (Bibliography), renumber B66 as B48. Page 345: In Appendix E (Bibliography), renumber B67 as B49 and change the location of citation from Rule 420Q NOTE to Rule 410A6 NOTE. Page 345: In Appendix E (Bibliography), renumber B68 as B50 and change the locations of citation to Table 431-1 Footnote 4
40、, Rules 441A1d NOTE 2 and 441A4 NOTE 2, and Table 441-1 Footnote 7. Page 345: In Appendix E (Bibliography), delete B69 and B70. Page 346: In Appendix E (Bibliography), renumber B71 and B72 as B51 and B52. Accredited Standards Committee C2-2017 13 September 2016 18 Insert to STDPT20924 Appendix E Bib
41、liography Bibliographical references are resources that provide additional or helpful material but do not need to be understood or used to implement this standard. Reference to these resources is made for informational use only. B1 208-V Arc Flash Testing: Network Protectors and Meters. EPRI, Palo A
42、lto, CA: 2010. Table 410-1 Footnotes 2, 3, and 10 B2 480-V Distribution Arc Flash Updates, Electric Power Research Institute (EPRI), Palo Alto, CA: 2011. Table 410-1 Footnote 4 B3 ACI-318, Building Code Requirements for Structural Concrete (for reinforced concrete designs). Rule 260B1 NOTE 2 B4 ACI-
43、318, 1983, Building Code Requirements for Structural Concrete (for anchor bolt bond strength and design). Rule 260B1 NOTE 2 B5 AISI S100, Specification for the Design of Cold-Formed Steel Structural Members. Rule 260B1 NOTE 2 B6 ANSI C29.11-2012, American National Standard for Composite InsulatorsTe
44、st Methods. Rule 279A1b B7 ANSI C84.1-1995, American National Standard Safety Requirements for Electric Power Systems and EquipmentVoltage Ratings (60 Hertz). Rule 441A1d NOTE 3 B8 ANSI ASC A14.1-2007, American National Standard Safety Requirements for Portable Wood Ladders. Rule 323F NOTE B9 ANSI A
45、SC A14.2-2007, American National Standard Safety Requirements for Portable Metal Ladders. Rule 323F NOTE B10 ANSI ASC A14.3-2008, American National Standard Safety Requirements for Fixed Ladders. Rule 323F NOTE B11 ANSI ASC A14.5-2007, American National Standard Safety Requirements for Portable Rein
46、forced Plastic Ladders. Rule 323F NOTE B12 ANSI/ASCE-10, Design of Latticed Steel Transmission Structures. Rule 260B1 NOTE 2 B13 ANSI/ASSE A1264.1-2007, American National Standard Safety Requirements for Workplace Walking/Working Surfaces and Their Access; Workplace, Floor, Wall and Roof Openings; S
47、tairs and Guardrails Systems. Rule 112D NOTE The bibliography shown below incorporates the changes on pages 16 and 17 of this errata dated 2 September 2016. Accredited Standards Committee C2-2017 13 September 2016 19 Insert to STDPT20924 B14 API RP 500, Recommended Practice for Classification of Loc
48、ations for Electrical Installations at Petroleum Facilities, 7 January 1998. Rule 127L NOTE B15 ASCE-48, Design of Steel Transmission Pole Structures. Rule 260B1 NOTE 2 B16 ASCE-91, Design of Guyed Electrical Transmission Structure. Rule 260B1 NOTE 2 B17 ASCE-104, Recommended Practice For Fiber-Reinforced Polymer Products For Overhead Utility Line Structures. Rule 260B1 NOTE 2 B18 ASCE-111, Reliability-Based Design of Utility Pole Structures. Rule 260B1 NOTE 1 B19 ASCE-113, Substation Structure Design Guide. Rule 260B1 NOTE 2 B20 ASCE-123, Prestressed Concrete Tran
