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IEEE C2-2023

$115.92

2023 National Electrical Safety Code(R) (NESC(R)) (Published)

Published By Publication Date Number of Pages
IEEE 2023 412
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Revision Standard – Active. The 2023 NESC(R) covers practical safeguarding of persons during the installation, operation, or maintenance of (1) electric supply stations, (2) overhead supply and communications lines, and (3) underground or buried supply and communication cables. It also includes work rules for the operation of electric supply and communications lines and equipment. This Code consists of the introduction, definitions, grounding rules, lists of referenced and bibliographic documents, and Parts 1, 2, 3, and 4 of the 2023 Edition of the National Electrical Safety Code.

PDF Catalog

PDF Pages PDF Title
1 2023 National Electrical Safety Code® (NESC®) Front cover
2 Title page
4 Important Notices and Disclaimers Concerning the NESC®
7 Foreword
13 Committee Membership
24 Procedure for revising the NESC
26 Time schedule for the next revision of the NESC
29 Contents
35 Figures
37 Tables
40 Section 1. Introduction to the National Electrical Safety Code®
010. Purpose
011. Scope
42 012. General rules
43 013. Application
44 014. Waiver for emergency and temporary installations
015. Intent
45 016. Effective date
017. Units of measure
018. Method of calculation
46 Section 2. Definitions of special terms
59 Section 3. References
62 Section 9. Grounding methods for electric supply and communications facilities
090. Purpose
091. Scope
092. Point of connection of grounding conductor
65 093. Grounding conductor and means of connection
68 094. Grounding electrodes
71 095. Method of connection to electrode
72 096. Ground resistance requirements
73 097. Separation of grounding conductors
74 098. Number 098 not used in this edition.
099. Additional requirements for grounding and bonding of communication apparatus
76 Part 1. Safety Rules for the Installation and Maintenance of Electric Supply Stations and Equipment
Section 10. Purpose and scope of rules
100. Purpose
101. Scope
102. Application of rules
103. Referenced sections
77 Section 11. Protective arrangements in electric supply stations
110. General requirements
80 111. Illumination
82 112. Floors, floor openings, passageways, and stairs
113. Exits
84 Section 12. Installation and maintenance of equipment
120. General requirements
121. Inspections
122. Guarding shaft ends, pulleys, belts, and suddenly moving parts
123. Protective grounding
85 124. Guarding live parts
92 125. Working space about electric equipment
93 126. Equipment for work on energized parts
127. Classified locations
96 128. Identification
129. Mobile hydrogen equipment
97 Section 13. Rotating equipment
130. Speed control and stopping devices
131. Motor control
98 132. Number 132 not used in this edition.
133. Short-circuit protection
99 Section 14. Storage batteries
140. General
100 141. Switchgear and plant batteries
142. Grid storage batteries
101 Section 15. Transformers and regulators
150. Current-transformer secondary circuits protection when exceeding 600 V
151. Grounding secondary circuits of instrument transformers
152. Location and arrangement of power transformers and regulators
102 153. Short-circuit protection of power transformers
103 Section 16. Conductors
160. Application
161. Electrical protection
162. Mechanical protection and support
163. Isolation
164. Conductor terminations
105 Section 17. Circuit breakers, reclosers, switches, fuses, and other equipment
170. General
171. Arrangement
172. Application
173. Circuit breakers, reclosers, and switches containing oil
174. Switches and disconnecting devices
106 175. Disconnection of fuses
176. Open gaps and breaks
177. Arresters
107 Section 18. Switchgear and metal-enclosed bus
180. Switchgear assemblies
108 181. Metal-enclosed bus
110 Section 19. Photovoltaic generating stations
190. General
191. Location
192. Grounding configurations
193. Vegetation management
194. DC overcurrent protection
195. DC conductors
111 Part 2. Safety Rules for the Installation and Maintenance of Overhead Electric Supply and Communication Lines
Section 20. Purpose, scope, and application of rules
200. Purpose
201. Scope
202. Application of rules
112 Section 21. General requirements
210. Referenced sections
211. Number 211 not used in this edition.
212. Induced voltages
213. Accessibility
214. Inspection and tests of lines and equipment
113 215. Grounding and bonding
115 216. Arrangement of switches
116 217. General
118 218. Vegetation management
119 Section 22. Relations between various classes of lines and equipment
220. Relative levels
120 221. Avoidance of conflict
121 222. Joint use of structures
223. Communications protective requirements
224. Communication circuits located within the supply space and supply circuits located within the communication space
123 225. Electric railway construction
125 Section 23. Clearances
230. General
132 231. Clearances of supporting structures from other objects
133 232. Vertical clearances of wires, conductors, cables, and equipment aboveground, roadway, rail, or water surfaces
144 233. Clearances between wires, conductors, and cables carried on different supporting structures
153 234. Clearance of wires, conductors, cables, and equipment from buildings, bridges, rail cars, swimming pools, supporting structures, and other installations
177 235. Clearance for wires, conductors, or cables carried on the same supporting structure
196 236. Climbing space
200 237. Working space
201 238. Clearances at the support between specified communications and supply facilities located on the same structure
206 239. Clearance of vertical and lateral facilities from other facilities and surfaces on the same supporting structure
212 Section 24. Grades of construction
240. General
241. Application of grades of construction to different situations
213 242. Grades of construction for conductors
215 243. Grades of construction for line supports
217 Section 25. Structural loadings for Grades B and C
250. General loading requirements and maps
234 251. Conductor loading
235 252. Loads on line supports
237 253. Load factors for structures, crossarms, support hardware, guys, foundations, and anchors
239 Section 26. Strength requirements
260. General (see also Section 20)
240 261. Grades B and C construction
249 262. Number 262 not used in this edition.
263. Grade N construction
251 264. Guying and bracing
253 Section 27. Line insulation
270. Application of rule
271. Material and marking
272. Ratio of flashover to puncture voltage
273. Insulation level
254 274. Factory tests
275. Special insulator applications
255 276. Number 276 not used in this edition.
277. Mechanical strength of insulators
256 278. Aerial cable systems
257 279. Guy and span insulators
258 28. Section number 28 not used in this edition.
29. Section number 29 not used in this edition.
259 Part 3. Safety Rules for the Installation and Maintenance of Underground Electric Supply and Communication Lines
Section 30. Purpose, scope, and application of rules
300. Purpose
301. Scope
302. Application of rules
260 Section 31. General requirements applying to underground lines
310. Referenced sections
311. Installation and maintenance
312. Accessibility
313. Inspection and tests of lines and equipment
261 314. Grounding of circuits and equipment
315. Communications protective requirements
262 316. Induced voltage
263 Section 32. Underground conduit systems
320. Location
264 321. Excavation and backfill
265 322. Conduit, ducts, and joints
266 323. Manholes, handholes, and vaults
270 Section 33. Supply cable
330. General
331. Sheaths and jackets
332. Shielding
333. Cable accessories and joints
272 Section 34. Cable in underground structures
340. General
341. Installation
273 342. Grounding and bonding
274 343. Number not used in this edition.
344. Communication cables containing special supply circuits
275 Section 35. Direct-buried cable and cable in duct not part of a conduit system
350. General
276 351. Location and routing
277 352. Installation
279 353. Deliberate separations—Equal to or greater than 12 in (300 mm) from underground structures or other cables
354. Random separation—Separation less than 12 in (300 mm) from underground structures or other cables
282 355. Additional rules for duct not part of a conduit system
283 Section 36. Risers
360. General
361. Installation
362. Pole risers—Additional requirements
363. Pad-mounted installations
284 Section 37. Supply cable terminations
370. General
371. Support at terminations
372. Identification
373. Clearances in enclosures or vaults
374. Grounding
285 Section 38. Equipment
380. General
381. Design
286 382. Location in underground structures
383. Installation
384. Grounding and bonding
385. Identificaiton
287 Section 39. Installation in tunnels
390. General
391. Environment
288 Part 4. Work Rules for the Operation of Electric Supply and Communications Lines and Equipment
Section 40. Purpose and scope
400. Purpose
401. Scope
402. Referenced sections
289 Section 41. Supply and communications systems—Rules for employers
410. General requirements
296 411. Protective methods and devices
298 Section 42. General rules for employees
420. General
302 421. General operating routines
303 422. Overhead line operating procedures
423. Underground line operating procedures
306 Section 43. Additional rules for communications employees
430. General
431. Approach to energized conductors or parts
308 432. Joint-use structures
433. Attendant on surface at joint-use manhole
434. Sheath continuity
309 Section 44. Additional rules for supply employees
440. General
441. Energized conductors or parts
319 442. Switching control procedures
320 443. Work on energized lines and equipment
322 444. De-energizing equipment or lines to protect employees
324 445. Protective grounds
325 446. Live work
326 447. Protection against arcing and other damage while installing and maintaining insulators and conductors
327 Appendix A—Uniform system of clearances adopted in the 1990 Edition
332 Appendix B—Uniform clearance calculations for conductors under ice and wind conditions adopted in the 2007 Edition
335 Appendix C—Example applications for Rule 250C, Table 250-2, Table 250-3(a), and Table 250-3(b)
350 Appendix D—Practical Approaches to Reducing Transient Overvoltages Factors for Live Work
355 Appendix E—Bibliography
360 Annex 1—Metric tables and figures
396 Annex 2—Letter symbols for units
398 Index
A-C
C-D
399 D-F
401 F-G
402 H-I
403 I-L
L-O
405 O
407 O-R
R-S
409 S-T
410 T-U
U-W
412 Back cover
IEEE C2-2023
$115.92