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IEEE C2 2017

IEEE C2 2017

$102.92

IEEE C2-2017: National Electrical Safety Code

Published By Publication Date Number of Pages
IEEE 2017 405
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Scope These rules cover supply and communication lines, equipment, and associated work practices employed by a public or private electric supply, communications, railway, or similar utility in the exercise of its function as a utility. Purpose The purpose of the NESC is the practical safeguarding of persons, and utility facilities during the installation, operation, and maintenance of electric supply and communication facilities, under specified conditions. Abstract This Code covers basic provisions for safeguarding of persons from hazards arising from the installation, operation, or maintenance of (1) conductors and equipment in electric supply stations, and (2) overhead and underground electric supply and communication lines. It also includes work rules for the construction, maintenance, and operation of electric supply and communication lines and equipment. The Code is applicable to the systems and equipment operated by utilities, or similar systems and equipment, of an industrial establishment or complex under the control of qualified persons. This Code consists of the introduction, definitions, grounding rules, list of referenced and bibliographic documents, and Parts 1, 2, 3, and 4 of the 2017 Edition of the National Electrical Safety Code

PDF Catalog

PDF Pages PDF Title
1 National Electrical Safety CodeĀ® (NESCĀ®) 2017 Edition Front cover
2 NESC title page
4 Foreword
9 Committee Membership
17 Procedure for revising the NESC
19 Time schedule for next revision
20 Working Group assignments for 2022 Edition
22 Contents
43 Letter symbols for units
44 Section 1. Introduction to the National Electrical Safety Code
010. Purpose
011. Scope
47 012. General rules
013. Application
48 014. Waiver for emergency and temporary installations
015. Intent
49 016. Effective date
017. Units of measure
018. Method of calculation
50 Section 2. Definitions of special terms
64 Section 3. References
67 Section 9. Grounding methods for electric supply and communications facilities
090. Purpose
091. Scope
092. Point of connection of grounding conductor
70 093. Grounding conductor and means of connection
73 094. Grounding electrodes
76 095. Method of connection to electrode
77 096. Ground resistance requirements
78 097. Separation of grounding conductors
79 098. Number 098 not used in this edition.
099. Additional requirements for grounding and bonding of communication apparatus
82 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
83 Section 11. Protective arrangements in electric supply stations
110. General requirements
86 111. Illumination
88 112. Floors, floor openings, passageways, and stairs
113. Exits
90 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
91 124. Guarding live parts
103 125. Working space about electric equipment
104 126. Equipment for work on energized parts
127. Classified locations
106 128. Identification
129. Mobile hydrogen equipment
107 Section 13. Rotating equipment
130. Speed control and stopping devices
131. Motor control
108 132. Number 132 not used in this edition.
133. Short-circuit protection
109 Section 14. Storage batteries
140. General
141. Location
142. Ventilation
143. Racks
144. Floors in battery areas
145. Illumination for battery areas
146. Service facilities
111 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
112 153. Short-circuit protection of power transformers
113 Section 16. Conductors
160. Application
161. Electrical protection
162. Mechanical protection and support
163. Isolation
164. Conductor terminations
114 Section 17. Circuit breakers, reclosers, switches, and fuses
170. Arrangement
171. Application
172. Circuit breakers, reclosers, and switches containing oil
173. Switches and disconnecting devices
174. Disconnection of fuses
116 Section 18. Switchgear and metal-enclosed bus
180. Switchgear assemblies
117 181. Metal-enclosed bus
119 Section 19. Surge arresters
190. General requirements
191. Indoor locations
192. Grounding conductors
193. Installation
120 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
121 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
122 215. Grounding of circuits, supporting structures, and equipment
124 216. Arrangement of switches
125 217. General
126 218. Vegetation management
128 Section 22. Relations between various classes of lines and equipment
220. Relative levels
129 221. Avoidance of conflict
130 222. Joint use of structures
223. Communications protective requirements
224. Communication circuits located within the supply space and supply circuits located within the communication space
132 225. Electric railway construction
133 Section 23. Clearances
139 231. Clearances of supporting structures from other objects
232. Vertical clearances of wires, conductors, cables, and equipment aboveground, roadway, rail, or water surfaces
157 233. Clearances between wires, conductors, and cables carried on different supporting structures
169 234. Clearance of wires, conductors, cables, and equipment from buildings, bridges, rail cars, swimming pools, and other installations
200 235. Clearance for wires, conductors, or cables carried on the same supporting structure
227 236. Climbing space
231 237. Working space
232 238. Vertical clearance between specified communications and supply facilities located on the same structure
234 239. Clearance of vertical and lateral facilities from other facilities and surfaces on the same supporting structure
241 Section 24. Grades of construction
240. General
241. Application of grades of construction to different situations
242 242. Grades of construction for conductors
245 243. Grades of construction for line supports
246 Section 25. Loadings for Grades B and C
250. General loading requirements and maps
264 251. Conductor loading
265 252. Loads on line supports
267 253. Load factors for structures, crossarms, support hardware, guys, foundations, and anchors
269 Section 26. Strength requirements
260. General (see also Section 20)
270 261. Grades B and C construction
279 262. Number 262 not used in this edition.
263. Grade N construction
281 264. Guying and bracing
283 Section 27. Line insulation
270. Application of rule
271. Material and marking
272. Ratio of flashover to puncture voltage
273. Insulation level
284 274. Factory tests
275. Special insulator applications
285 276. Number 276 not used in this edition.
277. Mechanical strength of insulators
286 278. Aerial cable systems
287 279. Guy and span insulators
290 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
291 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
292 314. Grounding of circuits and equipment
315. Communications protective requirements
293 316. Induced voltage
294 Section 32. Underground conduit systems
320. Location
296 321. Excavation and backfill
322. Conduit, ducts, and joints
297 323. Manholes, handholes, and vaults
301 Section 33. Supply cable
330. General
331. Sheaths and jackets
332. Shielding
333. Cable accessories and joints
303 Section 34. Cable in underground structures
340. General
341. Installation
304 342. Grounding and bonding
343. Number not used in this edition.
344. Communication cables containing special supply circuits
306 Section 35. Direct-buried cable and cable in duct not part of a conduit system
350. General
307 351. Location and routing
308 352. Installation
310 353. Deliberate separationsā€”Equal to or greater than 300 mm (12 in) from underground structures or other cables
354. Random separationā€”Separation less than 300 mm (12 in) from underground structures or other cables
313 355. Additional rules for duct not part of a conduit system
314 Section 36. Risers
360. General
361. Installation
362. Pole risersā€”Additional requirements
363. Pad-mounted installations
315 Section 37. Supply cable terminations
370. General
371. Support at terminations
372. Identification
373. Clearances in enclosures or vaults
374. Grounding
316 Section 38. Equipment
380. General
381. Design
317 382. Location in underground structures
383. Installation
384. Grounding and bonding
385. Identification
318 Section 39. Installation in tunnels
390. General
391. Environment
320 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
321 Section 41. Supply and communications systemsā€”Rules for employers
410. General requirements
326 411. Protective methods and devices
328 Section 42. General rules for employees
420. General
331 421. General operating routines
332 422. Overhead line operating procedures
333 423. Underground line operating procedures
335 Section 43. Additional rules for communications employees
430. General
431. Approach to energized conductors or parts
338 432. Joint-use structures
433. Attendant on surface at joint-use manhole
434. Sheath continuity
339 Section 44. Additional rules for supply employees
440. General
441. Energized conductors or parts
352 442. Switching control procedures
353 443. Work on energized lines and equipment
355 444. De-energizing equipment or lines to protect employees
357 445. Protective grounds
358 446. Live work
359 447. Protection against arcing and other damage while installing and maintaining insulators and conductors
360 Appendix Aā€”Uniform system of clearances adopted in the 1990 Edition
Reference: Rules 232, 233, and 234
366 Appendix Bā€”Uniform clearance calculations for conductors under ice and wind conditions adopted in the 2007 Edition
Rules 230, 232A, 233A1a(3), 234A1, 235C2b(1)(c), Definitions
369 Appendix Cā€”Example applications for Rule 250C Table 250-2 and Table 250-3
384 Appendix Dā€”Determining maximum anticipated per-unit overvoltage factor (T) at the worksite
385 Appendix Eā€”Bibliography
390 Index
A-C
391 C
392 D-F
393 F-G
394 G-I
395 I-L
396 L-O
397 O
398 O
399 O-R
400 R-S
401 S
402 S-U
403 U-V
404 V-W
405 Back cover

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