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Summary
Summary
Publisher's Note: Products purchased from Third Party sellers are not guaranteed by the publisher for quality, authenticity, or access to any online entitlements included with the product.
A Hands-on Guide to the 2007 NESC® that Clarifies Code Rules for You to Achieve Full Compliance!
McGraw-Hill's National Electrical Safety Code® 2007 Handbook delivers a rule-by-rule annotation of the NESC® that clarifies the often confusing Code text and allows you to perform your work confidently and safely. Designed for use with the Code itself, this expert resource guides readers through safety rules for the installation, operation, and maintenance of electrical supply stations and equipment, and also for overhead and underground electric supply and communication lines.
Fully updated with all the latest rules, McGraw-Hill's National Electrical Safety Code® 2007 Handbook features:
The best complete NESC® annotation currently available A rule-by-rule overview of the entire code Over 500 detailed illustrations and photographs A wealth of practical examples of code applications Concise explanations of controversial rulesInside this Time-Saving, NESC Compliance Tool
* General Sections: Definitions * Grounding * Part 1. Rules for Installation and Maintenance of Electric Supply Stations and Equipment: Fences * Safety Signs * Storage * Working Space * Batteries * Transformers and Regulators * Conductors * Circuit Breakers, Reclosers, Switches, and Fuses * Surge Arresters * Part 2. Rules for Installation and Maintenance of Overhead Electric Supply and Communication Lines: Inspections * Clearances * Joint Use * Grades of Construction * Loadings * Strength Requirements * Line Insulation * Part 3. Rules for Installation and Maintenance of Underground Electric Supply and Communication Lines: Underground Conduit Systems * Supply Cable * Cable in Underground Structures * Direct-Buried Cable * Risers * Terminations * Part 4. Rules for Operation of Electric Supply and Communication Lines and Equipment: Employer Rules * Employee Rules * Communication Worker Rules * Supply Worker Rules * OSHA RequirementsAuthor Notes
David J. Marne, P.E., B.S.E.E., is a consulting electrical engineer. He is company president and senior engineer for Marne and Associates, Inc., in Missoula, Montana, where he specializes in NESC(R) training and engineering design. Mr. Marne serves on NESC(R)Subcommittee 4, Overhead Lines-Clearances, he is a senior member of the IEEE, and has presented seminars on the NESC(R) to a variety of industry professionals.
Table of Contents
Preface | p. xiii |
Acknowledgments | p. xv |
General Sections | |
Section 01 Introduction to the National Electrical Safety Code | p. 3 |
010 Purpose | p. 3 |
011 Scope | p. 4 |
012 General Rules | p. 6 |
013 Application | p. 7 |
014 Waiver | p. 8 |
015 Intent | p. 9 |
016 Effective Date | p. 10 |
017 Units of Measure | p. 10 |
018 Method of Calculation | p. 11 |
Section 02 Definitions of Special Terms | p. 13 |
Section 03 References | p. 15 |
Section 09 Grounding Methods for Electric Supply and Communications Facilities | p. 17 |
090 Purpose | p. 17 |
091 Scope | p. 17 |
092 Point of Connection of Grounding Conductor | p. 18 |
093 Grounding Conductor and Means of Connection | p. 29 |
094 Grounding Electrodes | p. 35 |
095 Method of Connection to Electrode | p. 39 |
096 Ground Resistance Requirements | p. 44 |
097 Separation of Grounding Conductors | p. 48 |
098 Number 098 Not Used in This Edition | p. 52 |
099 Additional Requirements for Grounding and Bonding of Communication Apparatus | p. 52 |
Part 1 Rules for the Installation and Maintenance of Electric Supply Stations and Equipment | |
Section 10 Purpose and Scope of Rules | p. 57 |
100 Purpose | p. 57 |
101 Scope | p. 57 |
102 Application of Rules | p. 58 |
103 Referenced Sections | p. 58 |
Section 11 Protective Arrangements in Electric Supply Stations | p. 59 |
110 General Requirements | p. 59 |
111 Illumination | p. 67 |
112 Floors, Floor Openings, Passageways, and Stairs | p. 68 |
113 Exits | p. 69 |
114 Fire-Extinguishing Equipment | p. 70 |
Section 12 Installation and Maintenance of Equipment | p. 71 |
120 General Requirements | p. 71 |
121 Inspections | p. 71 |
122 Guarding Shaft Ends, Pulleys, Belts, and Suddenly Moving Parts | p. 72 |
123 Protective Grounding | p. 72 |
124 Guarding Live Parts | p. 73 |
125 Working Space About Electric Equipment | p. 76 |
126 Equipment for Work on Energized Parts | p. 80 |
127 Classified Locations | p. 81 |
128 Identification | p. 81 |
129 Mobile Hydrogen Equipment | p. 82 |
Section 13 Rotating Equipment | p. 83 |
130 Speed Control and Stopping Devices | p. 83 |
131 Motor Control | p. 84 |
132 Number 132 Not Used in This Edition | |
133 Short-Circuit Protection | p. 84 |
Section 14 Storage Batteries | p. 87 |
140 General | p. 87 |
141 Location | p. 88 |
142 Ventilation | p. 88 |
143 Racks | p. 88 |
144 Floors in Battery Areas | p. 89 |
145 Illumination for Battery Areas | p. 89 |
146 Service Facilities | p. 89 |
Section 15 Transformers and Regulators | p. 91 |
150 Current-Transformer Secondary Circuits Protection When Exceding 600 V | p. 91 |
151 Grounding Secondary Circuits of Instrument Transformers | p. 91 |
152 Location and Arrangement of Power Transformers and Regulators | p. 92 |
153 Short-Circuit Protection of Power Transformers | p. 94 |
Section 16 Conductors | p. 97 |
160 Application | p. 97 |
161 Electrical Protection | p. 98 |
162 Mechanical Protection and Support | p. 99 |
163 Isolation | p. 99 |
164 Conductor Terminations | p. 101 |
Section 17 Circuit Breakers, Reclosers, Switches, and Fuses | p. 103 |
170 Arrangement | p. 103 |
171 Application | p. 104 |
172 Circuit Breakers, Reclosers, and Switches Containing Oil | p. 106 |
173 Switches and Disconnecting Devices | p. 106 |
174 Disconnection of Fuses | p. 107 |
Section 18 Switchgear and Metal-Enclosed Bus | p. 109 |
180 Switchgear Assemblies | p. 109 |
181 Metal-Enclosed Bus | p. 111 |
Section 19 Surge Arresters | p. 115 |
190 General Requirements | p. 115 |
191 Indoor Locations | p. 115 |
192 Grounding Conductors | p. 116 |
193 Installation | p. 116 |
Part 2 Safety Rules for the Installation and Maintenance of Overhead Electric Supply and Communication Lines | |
Section 20 Purpose, Scope, and Application of Rules | p. 119 |
200 Purpose | p. 119 |
201 Scope | p. 119 |
202 Application of Rules | p. 120 |
Section 21 General Requirements | p. 123 |
210 Referenced Sections | p. 123 |
211 Number 211 Not Used in This Edition | |
212 Induced Voltages | p. 123 |
213 Accessibility | p. 123 |
214 Inspection and Tests of Lines and Equipment | p. 124 |
215 Grounding of Circuits, Supporting Structures, and Equipment | p. 126 |
216 Arrangement of Switches | p. 126 |
217 General | p. 126 |
218 Vegetation Management | p. 134 |
Section 22 Relations between Various Classes of Lines and Equipment | p. 141 |
220 Relative Levels | p. 141 |
221 Avoidance of Conflict | p. 143 |
222 Joint Use of Structures | p. 145 |
223 Communications Protective Requirements | p. 149 |
224 Communication Circuits Located Within the Supply Space and Supply Circuits Located Within the Communication Space | p. 149 |
225 Electric Railway Construction | p. 151 |
Section 23 Clearances | p. 153 |
230 General | p. 161 |
231 Clearances of Supporting Structures from Other Objects | p. 174 |
232 Vertical Clearances of Wires, Conductors, Cables, and Equipment above Ground, Roadway, Rail, or Water Surfaces | p. 177 |
233 Clearances between Wires, Conductors, and Cables Carried on Different Supporting Structures | p. 198 |
234 Clearance of Wires, Conductors, Cables, and Equipment from Buildings, Bridges, Rail Cars, Swimming Pools, and Other Installations | p. 210 |
235 Clearance for Wires, Conductors, or Cables Carried on the Same Supporting Structure | p. 227 |
236 Climbing Space | p. 247 |
237 Working Space | p. 253 |
238 Vertical Clearance between Certain Communication and Supply Facilities Located on the Same Structure | p. 254 |
239 Clearance of Vertical and Lateral Facilities from Other Facilities and Surfaces on the Same Supporting Structure | p. 260 |
Section 24 Grades of Construction | p. 281 |
240 General | p. 281 |
241 Application of Grades of Construction to Different Situations | p. 283 |
242 Grades of Construction for Conductors | p. 284 |
243 Grades of Construction for Line Supports | p. 287 |
Section 25 Loadings for Grades B and C | p. 291 |
250 General Loading Requirements and Maps | p. 291 |
251 Conductor Loading | p. 297 |
252 Loads on Line Supports | p. 300 |
253 Load Factors for Structures, Crossarms, Support Hardware, Guys, Foundations, and Anchors | p. 308 |
Section 26 Strength Requirements | p. 311 |
260 General (see also Section 20) | p. 311 |
261 Grades B and C Construction | p. 315 |
262 Number 262 Not Used in This Edition | p. 328 |
263 Grade N Construction | p. 328 |
264 Guying and Bracing | p. 329 |
Section 27 Line Insulation | p. 339 |
270 Application of Rule | p. 339 |
271 Material and Marking | p. 339 |
272 Ratio of Flashover to Puncture Voltage | p. 340 |
273 Insulation Level | p. 341 |
274 Factory Tests | p. 342 |
275 Special Insulator Applications | p. 342 |
276 Number 276 Not Used in This Edition | p. 343 |
277 Mechanical Strength of Insulators | p. 344 |
278 Aerial Cable Systems | p. 344 |
279 Guy and Span Insulators | p. 344 |
Section 28 Section Number 28 Not Used in This Edition | |
Section 29 Section Number 29 Not Used in This Edition | |
Part 3 Safety Rules for the Installation and Maintenance of Underground Electric Supply and Communication Lines | |
Section 30 Purpose, Scope, and Application of Rules | p. 351 |
300 Purpose | p. 351 |
301 Scope | p. 351 |
302 Application of Rule | p. 353 |
Section 31 General Requirements Applying to Underground Lines | p. 355 |
310 Referenced Sections | p. 355 |
311 Installation and Maintenance | p. 355 |
312 Accessibility | p. 357 |
313 Inspection and Tests of Lines and Equipment | p. 359 |
314 Grounding of Circuits and Equipment | p. 359 |
315 Communications Protective Requirements | p. 359 |
316 Induced Voltage | p. 359 |
Section 32 Underground Conduit Systems | p. 363 |
320 Location | p. 363 |
321 Excavation and Backfill | p. 373 |
322 Ducts and Joints | p. 373 |
323 Manholes, Handholes, and Vaults | p. 373 |
Section 33 Supply Cable | p. 385 |
330 General | p. 385 |
331 Sheaths and Jackets | p. 385 |
332 Shielding | p. 386 |
333 Cable Accessories and Joints | p. 386 |
Section 34 Cable in Underground Structures | p. 389 |
340 General | p. 389 |
341 Installation | p. 389 |
342 Grounding and Bonding | p. 393 |
343 Fireproofing | p. 396 |
344 Communication Cables Containing Special Supply Circuits | p. 396 |
Section 35 Direct-Buried Cable | p. 399 |
350 General | p. 399 |
351 Location and Routing | p. 401 |
352 Installation | p. 403 |
353 Deliberate Separations-Equal to or Greater Than 300 mm (12 in) from Underground Structures or Other Cables | p. 407 |
354 Random Separation-Separation Less Than 300 mm (12 in) from Underground Structures or Other Cables | p. 409 |
Section 36 Risers | p. 413 |
360 General | p. 413 |
361 Installation | p. 413 |
362 Pole Risers-Additional Requirements | p. 413 |
363 Pad-Mounted Installations | p. 414 |
Section 37 Supply Cable Terminations | p. 419 |
370 General | p. 419 |
371 Support at Terminations | p. 420 |
372 Identification | p. 420 |
373 Clearances in Enclosures or Vaults | p. 421 |
374 Grounding | p. 422 |
Section 38 Equipment | p. 423 |
380 General | p. 423 |
381 Design | p. 424 |
382 Location in Underground Structures | p. 428 |
383 Installation | p. 429 |
384 Grounding and Bonding | p. 429 |
385 Identification | p. 430 |
Section 39 Installation in Tunnels | p. 431 |
390 General | p. 431 |
391 Environment | p. 431 |
Part 4 Rules for the Operation of Electric Supply and Communications Lines and Equipment | |
Section 40 Purpose and Scope | p. 435 |
400 Purpose | p. 435 |
401 Scope | p. 435 |
402 Referenced Sections | p. 437 |
Section 41 Supply and Communication Systems-Rules for Employers | p. 439 |
410 General Requirements | p. 440 |
411 Protective Methods and Devices | p. 442 |
Section 42 General Rules for Employees | p. 445 |
420 Personal General Precautions | p. 446 |
421 General Operating Routines | p. 454 |
422 Overhead Line Operating Procedures | p. 456 |
423 Underground Line Operating Procedures | p. 457 |
Section 43 Additional Rules for Communications Employees | p. 461 |
430 General | p. 464 |
431 Approach to Energized Conductors or Parts | p. 464 |
432 Joint-Use Structures | p. 465 |
433 Attendant on Surface at Joint-Use Manhole | p. 466 |
434 Sheath Continuity | p. 466 |
Section 44 Additional Rules for Supply Employees | p. 467 |
440 General | p. 470 |
441 Energized Conductors or Parts | p. 470 |
442 Switching Control Procedures | p. 473 |
443 Work on Energized Lines and Equipment | p. 477 |
444 De-energizing Equipment or Lines to Protect Employees | p. 482 |
445 Protective Grounds | p. 486 |
446 Live Work | p. 487 |
447 Protection against Arcing and Other Damage While Installing and Maintaining Insulators and Conductors | p. 489 |
Appendix A Photographs of NESC Applications | p. 491 |
Appendix B OSHA Standards Related to the NESC Work Rules | p. 557 |
Index | p. 745 |