Interpreting the National Electrical Code : Based on the 2005 National Electric Code

by Surbrook, Truman; Althouse, Jonathan

• ISBN13: 9781401852139
• ISBN10: 1401852130
• Edition: 7th
• Format: Paperback
• Copyright: 2004-12-16
• Publisher: Cengage Learning

Summary

Extraordinarily comprehensive, this book is completely updated to the 2005 National Electrical Code. and continues to offer valuable insight into the Code. articles. Explanations are provided for each article in detail, with thorough discussions and practical examples that clearly illustrate how the Code. and its most recent changes are applied. Discussions are logically organized into coherent subject groupings, allowing readers to navigate easily through 2005 NEC. requirements as well as changes since the last edition. Through this approach, the book also integrates essential information into the 7th Edition that is not directly addressed in the NEC but is extremely useful to electricians.

Table of Contents

Preface	xv
General Wiring and Fundamentals	1	(50)
Origin of the National Electrical Code®	1	(1)
Process of revising the code	3
Electrical Calculations with a Calculator	2	(1)
Example of string multiplication	2	(1)
Example of addition and multiplication	3	(1)
Example of string multiplication and division	3	(1)
Fundamentals of Electricity	3	(13)
AC and DC	3	(1)
Metric conversions	4	(1)
Wire dimensions	5	(2)
Wire resistance	7	(2)
Ohm's law	9	(1)
Circuits	10	(2)
Power and work formulas	12	(2)
Efficiency	14	(1)
Student practice problems	14	(2)
Code Discussion	16	(9)
Art. 80 Annex G Administration and enforcement	16	(1)
Art. 90 Introduction	16	(1)
Art. 100 Definitions	16	(1)
Art. 110 Requirements for electrical installations	17	(1)
Art. 200 Use and identification of grounded conductors	18	(1)
Art. 300 Wiring methods	19	(1)
Art. 310 Conductors for general wiring	20	(1)
Art. 320 Armored cable	21	(1)
Art. 324 Flat conductor cable	22	(1)
Art. 328 Medium-voltage cable	22	(1)
Art. 330 Metal-clad cable	23	(1)
Art. 332 Mineral-insulated, metal-sheathed cable	23	(1)
Art. 334 Nonmetallic-sheathed cable	23	(1)
Art. 336 Power and control tray cable	24	(1)
Art. 338 Service-entrance cable	24	(1)
Art. 340 Underground feeder and branch-circuit cable	25	(1)
Art. 382 Nonmetallic extensions	25	(1)
Art. 394 Concealed knob-and-tube wiring	25	(1)
Art. 590 Temporary installations	25	(1)
Ch. 9 Tables 8 and 9	25	(1)
Sizing Conductors for a Circuit	25	(4)
Using the Code to Answer Questions	29	(1)
Student Code Practice	30	(2)
Major Changes to the 2005 Code	32	(9)
Art. 100	32	(1)
Art. 110	33	(1)
Art. 200	34	(1)
Art. 300	35	(2)
Art. 310	37	(1)
Art. 320, 324, 330 and 332	38	(1)
Art. 334, 336, and 338	39	(1)
Art. 340	40	(1)
Art. 590	40	(1)
Ch. 9 Table 8	40	(1)
Worksheet No. 1---Beginning	41	(5)
Worksheet No. 1---Advanced	46	(5)
Wire, Raceway, and Box Sizing	51	(46)
Code Discussion	51	(10)
Art. 312 Cabinets, cutout boxes, and metal socket enclosures	51	(1)
Art. 314 Outlet, device, pull and junction boxes, conduit bodies, fittings, and handhole enclosures	51	(1)
Art. 342 Intermediate metal conduit (IMC)	52	(1)
Art. 344 Rigid metal conduit (RMC)	53	(1)
Art. 348 Flexible metal conduit (FMC)	53	(1)
Art. 350 Liquidtight flexible metal conduit (LFMC)	54	(1)
Art. 352 Rigid nonmetallic conduit (RNC)	54	(1)
Art. 356 Liquidtight flexible nonmetallic conduit (LFNC)	54	(3)
Art. 354 Nonmetallic underground conduit with conductors (UNCC)	57	(1)
Art. 358 Electrical metallic tubing (EMT)	57	(1)
Art. 360 Flexible metallic tubing (FMT)	57	(1)
Art. 362 Electrical nonmetallic tubing (ENT)	57	(1)
Art. 366 Auxiliary gutters	58	(1)
Art. 376 Metal wireways	58	(1)
Art. 378 Nonmetallic wireways	58	(1)
Art. 386 Surface metal raceways	58	(1)
Art. 388 Surface nonmetallic raceways	58	(1)
Ch. 9 Notes to tables	59	(1)
Ch. 9 Tables 1,2,4,5, and 5A	60	(1)
Sample Calculations	61	(17)
Protecting conductors	61	(1)
Neutral as a current-carrying conductor	62	(2)
Sizing conductors	64	(4)
Sizing conduit and tubing	68	(1)
Sizing conduit and tubing nipples	69	(1)
Wireway sizing	70	(1)
Sizing boxes	70	(3)
Pull boxes	73	(2)
Conduit bodies	75	(1)
Sizing and installing parallel conductor sets	76	(2)
Major Changes to the 2005 Code	78	(6)
Art. 312 and 314	78	(1)
Art. 342	79	(1)
Art. 344 and 348	80	(1)
Art. 350 and 353	81	(1)
Art. 356, 358, 376, and 378	82	(1)
Art. 386 and 388	83	(1)
Ch. 9 and Annex C	83	(1)
Worksheet No. 2---Beginning	84	(5)
Worksheet No. 2---Advanced	89	(8)
Outlets, Lighting, Appliances, and Heating	97	(38)
Code Discussion	97	(11)
Art. 210 Branch-circuits	97	(6)
Art. 220 Branch-circuit calculations	103	(1)
Art. 225 Outside branch-circuits and feeders	103	(1)
Art. 396 Messenger-supported wiring	104	(1)
Art. 398 Open wiring on insulators	104	(1)
Art. 400 Flexible cords and cables	104	(1)
Art. 402 Fixture wires	105	(1)
Art. 404 Switches	105	(1)
Art. 406 Receptacles, cord connectors, and attachment plugs	105	(2)
Art. 410 Luminaires (lighting fixtures), lampholders, and lamps	107	(1)
Art. 411 Lighting systems operating at 30 volts or less	107	(1)
Art. 422 Appliances	107	(1)
Art. 424 Fixed electric space-heating equipment	107	(1)
Art. 426 Fixed outdoor electric de-icing and snow-melting equipment	108	(1)
Art. 720 Circuits and equipment operating at less than 50 volts	108	(1)
Art. 725 Class 1, 2, and 3 remote-control, signaling and power-limited circuits	108	(1)
Sample Calculations	108	(5)
Circuit and outlet requirements	109	(2)
Electric range for a dwelling	111	(2)
Major Changes to the 2005 Code	113	(12)
Art. 210	114	(4)
Art. 220, Parts I and II	118	(1)
Art. 225	118	(1)
Art. 398	119	(1)
Art. 400	119	(1)
Art. 404 and 406	120	(1)
Art. 410	121	(2)
Art. 411, 422, 424, 426 and 725	123	(2)
Worksheet No. 3---Beginning	125	(5)
Worksheet No. 3---Advanced	130	(5)
Services and Feeder Calculations	135	(32)
Code Discussion	135	(12)
Art. 215 Feeders	135	(3)
Art. 220, Parts II and III Branch-circuit and feeder calculations	138	(3)
Art. 220, Part IV and V, Optional calculations and farm loads	141	(1)
Art. 230 Services	142	(4)
Annex D Examples	146	(1)
Sample Calculations	147	(5)
Example of a commercial service calculation	147	(3)
Example of a single-family dwelling demand load	150	(1)
Optional dwelling service calculation	151	(1)
Farm building demand load	152	(1)
Major Changes to the 2005 Code	152	(6)
Art. 215	152	(2)
Art. 220	154	(1)
Art. 230	155	(1)
Annex D	156	(2)
Worksheet No. 4---Beginning	158	(4)
Worksheet No. 4---Advanced	162	(5)
Grounding and Bonding	167	(38)
Code Discussion	167	(8)
Art. 250 Grounding and bonding	167	(5)
Art. 280 Surge arresters	172	(1)
Art. 285 Transient voltage surge suppressors	173	(1)
Art. 680 Swimming pools, fountains, and similar installations	174	(1)
Grounding and Bonding Fundamentals	175	(7)
Equipment grounding	175	(1)
Sizing equipment grounding conductors	176	(1)
Parallel equipment grounding conductors	177	(1)
Equipment grounding conductor size adjustments	177	(1)
Electrical shock	178	(1)
Electrical system grounding	179	(1)
Which conductor of the electrical system to ground	179	(1)
Grounding electrode	179	(1)
Grounding and bonding for service with parallel conductors	180	(2)
Electrical System Types and Voltages	182	(4)
Single-phase electrical systems	182	(1)
Three-phase electrical systems	183	(1)
High-impedance grounding	184	(2)
Major Changes to the 2005 Code	186	(7)
Art. 250	186	(5)
Art. 280	191	(1)
Art. 285	191	(1)
Art. 680	191	(2)
Worksheet No. 5---Beginning	193	(5)
Worksheet No. 5---Advanced	198	(7)
Overcurrent Protection	205	(36)
Code Discussion	205	(10)
Art. 240 Overcurrent protection	205	(5)
Art. 408 Switchboards and panelboards	210	(2)
Art. 550 Mobile homes, manufactured homes, and mobile home parks	212	(1)
Art. 551 Recreational vehicles and recreational vehicle parks	213	(2)
Art. 552 Park trailers	215	(1)
Overcurrent Protection Fundamentals	215	(7)
Overloads	215	(1)
Faults	215	(1)
Symmetrical and asymmetrical current	216	(1)
How damage occurs	216	(1)
Interrupting ratings of fuses and circuit breakers	217	(1)
Current limiting	217	(1)
Series rating	218	(1)
Feeder taps	219	(3)
Voltage Drop	222	(3)
Major Changes to the 2005 Code	225	(5)
Art. 240	225	(2)
Art. 408	227	(1)
Art. 550	228	(1)
Art. 551	228	(1)
Art. 552	229	(1)
Worksheet No. 6---Beginning	230	(5)
Worksheet No. 6---Advanced	235	(6)
Motor-Circuit Wiring	241	(38)
Code Discussion	241	(6)
Art. 409 Industrial control panel	241	(1)
Art. 430 Motors, motor circuits, and controllers	242	(1)
Art. 440 Air-conditioning and refrigerating equipment	243	(1)
Art. 455 Phase converters	243	(3)
Art. 460 Capacitors	246	(1)
Art. 470 Resistors and reactors	246	(1)
Art. 675 Electrically driven or controlled irrigation machines	246	(1)
Art. 685 Integrated electrical systems	247	(1)
Annex D Examples	247	(1)
Motor Circuits and Calculations	247	(9)
Motor nameplate and other information	247	(1)
Motor circuit	248	(1)
Methods of controlling motors	248	(1)
Enclosure types	249	(1)
Overcurrent device ratings	250	(1)
Motor overload protection	250	(2)
Remote control circuit wires	252	(1)
Motor-circuit examples	252	(4)
Grounding motors and controllers	256	(1)
Motor-Control Circuit Wiring	256	(4)
Adjustable-speed drives	259	(1)
Major Changes to the 2005 Code	260	(6)
Art. 409	260	(1)
Art. 430	261	(3)
Art. 440	264	(1)
Art. 675	265	(1)
Art. 685	265	(1)
Worksheet No. 7---Beginning	266	(6)
Worksheet No. 7---Advanced	272	(7)
Transformers	279	(36)
Code Discussion	279	(1)
Art. 450 Transformers and transformer vaults	279	(1)
Transformer Fundamentals	280	(7)
Types of transformers	280	(1)
Voltage and turns ratio	280	(1)
Transformer ratings	281	(1)
Connecting transformer windings	282	(1)
Three-phase transformers	282	(1)
Winding taps	283	(2)
Input and output current	285	(1)
Boost and buck transformers	285	(1)
K-Rated transformers	286	(1)
Overcurrent Protection for Transformers	287	(7)
Overcurrent protection only on the primary (600 volts or less)	288	(2)
Primary and secondary overcurrent protection (600 volts or less)	290	(3)
Boost and buck transformer overcurrent protection	293	(1)
Transformer Taps	294	(4)
Transformer Grounding	298	(2)
Major Changes to the 2005 Code	300	(1)
Art. 450	300	(1)
Worksheet No. 8---Beginning	301	(7)
Worksheet No. 8---Advanced	308	(7)
Hazardous Location Wiring	315	(28)
Code Discussion	315	(6)
Art. 500 Hazardous (classified) locations	316	(1)
Art. 501 Class I locations	316	(1)
Art. 502 Class II locations	316	(1)
Art. 503 Class III locations	316	(1)
Art. 504 Intrinsically safe systems	316	(1)
Art. 505 Class 1, Zone 0, 1, and 2 locations	317	(2)
Art. 506 Zone 20, 21, and 22 Locations for combustible dusts, fibers, and flyings	319	(1)
Art. 510 Hazardous (classified) locations, specific	320	(1)
Art. 511 Commercial garages, repair and storage	320	(1)
Art. 513 Aircraft hangars	320	(1)
Art. 514 Motor fuel dispensing facilities	320	(1)
Art. 515 Bulk storage plants	321	(1)
Art. 516 Spray applications, dipping, and coating processes	321	(1)
Hazardous Location Wiring Fundamentals	321	(6)
Types of hazardous locations	321	(1)
Ratings of equipment	322	(1)
Objectives of explosionproof enclosures	323	(1)
Sealing fittings	324	(1)
Equipment grounding and bonding	325	(1)
Dust-ignitionproof equipment	326	(1)
Flammable fibers and flyings	326	(1)
Special occupancies	326	(1)
Major Changes to the 2005 Code	327	(6)
Art. 500	327	(1)
Art. 501	327	(1)
Art. 502	328	(1)
Art. 503	329	(1)
Art. 504	329	(1)
Art. 505	329	(1)
Art. 506	330	(1)
Art. 511	330	(1)
Art. 513 and 514	331	(1)
Art. 516	332	(1)
Worksheet No. 9---Beginning	333	(5)
Worksheet No. 9---Advanced	338	(5)
Health Care Facilities	343	(20)
Code Discussion	343	(4)
Art. 517 Health care facilities	343	(4)
Art. 660 X-ray equipment	347	(1)
Art. 680 Part VI Therapeutic pools and tubs	347	(1)
Wiring in Hospitals	347	(4)
Definition of areas within a hospital	347	(1)
Hospital receptacle requirements	348	(1)
Grounding in hospitals	348	(2)
Hospital required electrical systems	350	(1)
Major Changes to the 2005 Code	351	(2)
Art. 517	351	(2)
Worksheet No. 10---Beginning	353	(4)
Worksheet No. 10---Advanced	357	(6)
Emergency and Alternate Power Systems	363	(40)
Code Discussion	363	(5)
Art. 445 Generators	363	(1)
Art. 480 Storage batteries	364	(1)
Art. 690 Solar photovoltaic systems	364	(1)
Art. 692 Fuel cell systems	365	(1)
Art. 695 Fire pumps	365	(1)
Art. 700 Emergency systems	366	(1)
Art. 701 Legally required standby systems	367	(1)
Art. 702 Optional standby systems	367	(1)
Art. 705 Interconnected electric power production sources	368	(1)
Emergency Electrical Systems	368	(7)
Fire alarm systems	369	(1)
Wiring fire alarm systems	370	(3)
Fire pumps	373	(2)
Alternate Electrical Power Systems	375	(11)
Solar photovoltaic systems	376	(3)
Fuel cell systems	379	(2)
Storage batteries	381	(1)
Inverters	382	(1)
Generators	382	(1)
Connecting alternate power sources	383	(1)
Grounding dc power sources	384	(2)
Direct current rating	386	(1)
Major Changes to the 2005 Code	386	(6)
Art. 445 and 690	386	(3)
Art. 695 and 700	389	(1)
Art. 701 and 702	390	(1)
Art. 760	391	(1)
Worksheet No. 11---Beginning	392	(5)
Worksheet No. 11---Advanced	397	(6)
Industrial Electrical Applications	403	(30)
Code Discussion	403	(9)
Art. 326 Integrated gas spacer cable	403	(1)
Art. 368 Busways	404	(1)
Art. 370 Cablebus	404	(1)
Art. 392 Cable trays	405	(2)
Art. 427 Fixed electric heating equipment for pipelines and vessels	407	(1)
Art. 490 Equipment over 600 volts nominal	408	(1)
Art. 610 Cranes and hoists	408	(1)
Art. 630 Electric welders	408	(2)
Art. 665 Induction and dielectric heating equipment	410	(1)
Art. 668 Electrolytic cells	410	(1)
Art. 669 Electroplating	411	(1)
Art. 670 Industrial machinery	411	(1)
Art. 727 Instrumentation tray cable	412	(1)
Art. 770 Optical fiber cables and raceways	412	(1)
Cable Tray Width and Conductor Ampacity	412	(6)
Major Changes to the 2005 Code	418	(4)
Art. 368	418	(1)
Art. 392	418	(1)
Art. 427	419	(1)
Art. 490	419	(1)
Art. 610	419	(1)
Art. 630, 670, and 770	420	(2)
Worksheet No. 12---Beginning	422	(5)
Worksheet No. 12---Advanced	427	(6)
Commercial Wiring Applications	433	(28)
Code Discussion	433	(11)
Art. 322 Flat cable assemblies	433	(1)
Art. 372 Cellular concrete floor raceways	433	(1)
Art. 374 Cellular metal floor raceways	434	(1)
Art. 380 Multioutlet assembly	434	(1)
Art. 384 Strut-type channel raceway	435	(2)
Art. 390 Underfloor raceways	437	(1)
Art. 518 Assembly occupancies	437	(1)
Art. 545 Manufactured buildings	437	(1)
Art. 600 Electric signs and outline lighting	437	(1)
Art. 604 Manufactured wiring systems	438	(1)
Art. 620 Elevators, dumbwaiters, escalators, moving walks, and chair lifts	438	(2)
Art. 647 Sensitive electronic equipment	440	(4)
Major Changes to the 2005 Code	444	(6)
Art. 372	444	(1)
Art. 374	445	(1)
Art. 384	445	(1)
Art. 390 and 518	445	(1)
Art. 600 and 604	446	(1)
Art. 605 and 620	447	(1)
Art. 645 and 647	448	(2)
Worksheet No. 13---Beginning	450	(5)
Worksheet No. 13---Advanced	455	(6)
Special Applications Wiring	461	(26)
Code Discussion	461	(11)
Art. 520 Theaters and similar locations	461	(2)
Art. 525 Carnivals, circuses, fairs, and similar events	463	(1)
Art. 530 Motion picture and television studios and similar locations	464	(1)
Art. 540 Motion picture projection rooms	464	(1)
Art. 547 Agricultural buildings	464	(4)
Art. 553 Floating buildings	468	(1)
Art. 555 Marinas and boatyards	468	(1)
Art. 625 Electric vehicle charging systems	468	(1)
Art. 640 Audio signal processing, amplification, and reproduction equipment	469	(1)
Art. 650 Pipe organs	469	(1)
Art. 682 Natural and artificially made bodies of water	470	(1)
Art. 800 Communication circuits	471	(1)
Art. 810 Radio and television equipment	471	(1)
Art. 820 Community antenna television and radio distribution systems	472	(1)
Art. 830 Network-powered broadband communications systems	472	(1)
Major Changes to the 2005 Code	472	(6)
Art. 520, 525 and 547	472	(3)
Art. 553, 555, 625, and 682	475	(1)
Art. 800 and 820	476	(1)
Art. 830	477	(1)
Worksheet No. 14---Beginning	478	(4)
Worksheet No. 14---Advanced	482	(5)
Review	487	(20)
Beginning Review	488	(9)
Advanced Review	497	(10)
Annexes, Metric Conversions Tables	507	(2)
Answer Sheets	509	(2)
Index Including Code Articles	511