Significant Changes to the NEC 2005 Edition Based on the 2005 National Electric Code

by NJATC, NJATC

• ISBN13: 9781401888527
• ISBN10: 1401888526
• Edition: 1st
• Format: Paperback
• Copyright: 2004-12-27
• Publisher: CENGAGE Delmar Learning

Summary

The National Electrical Code? (NEC?) is the most widely recognized and accepted electrical standard in the world. Every three years the NEC is updated to reflect the newest installation practices utilized by the electrical industry. Significant Changes to the NEC ? 2005 Edition is an invaluable resource to electricians, electrical contractors, electrical inspectors, and electrical engineers, focusing on the most important changes that occurred in the 2005 NEC?. The text is arranged to follow the general layout of the NEC?. To assist and enhance understanding of each revision, each change is accompanied by a helpful image or illustration. In addition, background information and a discussion on the significance of the change accompany each of the revisions. The comprehensive coverage offered in this book enables readers to gain a solid understanding and application of the requirements contained in the 2005 NEC?.

Table of Contents

Annex G, Articles 90, 100 and 110	2	(30)
Annex G Administration and Enforcement	4	(1)
90.2(B)(4) and (5) FPN Not Covered	5	(2)
90.5(C) Explanatory Material	7	(1)
Article 100 Bonding Jumper, System	8	(1)
Article 100 Coordination (Selective)	9	(1)
Article 100 Device	10	(1)
Article 100 Dwelling Unit	11	(2)
Article 100 Grounded, Solidly	13	(1)
Article 100 Grounding Electrode	14	(1)
Article 100 Grounding Electrode Conductor	15	(1)
Article 100 Guest Room	16	(1)
Article 100 Guest Suite	17	(1)
Article 100 Handhole Enclosure	18	(1)
Article 100 Qualified Person	19	(2)
Article 100 Separately Derived System	21	(1)
Article 100 Supplementary Overcurrent Protective Device	22	(1)
110.12 Mechanical Execution of Work	23	(1)
110.15 High-Leg Marking	24	(1)
110.16 Flash Protection	25	(2)
110.26(A)(1) Depth of Working Space	27	(2)
110.26(C)(2) Large Equipment	29	(2)
Article 110, PART V Manholes and Other Electric Enclosures Intended for Personnel Entry, All Voltages	31	(1)
Wiring and Protection, Articles 200--285	32	(112)
200.6(B) Sizes Larger Than 6 AWG	36	(1)
200.6(D) Grounded Conductors of Different Systems	37	(1)
Articles 210 & 220 Guest Rooms and Guest Suites	38	(1)
210.4(A), (B), and (D) Multiwire Branch Circuits	39	(3)
210.5(C) Ungrounded Conductors	42	(2)
210.8(A)(7) GFCI Protection, Dwelling Units	44	(1)
210.8(B)(2) GFCI Protection, Other Than Dwelling Units	45	(2)
210.8(B)(4) GFCI Protection, Other Than Dwelling Units	47	(2)
210.8(B)(5) GFCI Protection, Other Than Dwelling Units	49	(1)
210.8(C) Boat Hoists	50	(2)
210.12(B) and Exception Arc-Fault Circuit-Interrupter Protection in Dwelling Unit Bedrooms	52	(2)
210.18 Guest Rooms and Guest Suites	54	(1)
210.52(B)(1) Small Appliances, Receptacle Outlets Served	55	(1)
210.52(C)(1) Exception and (2) Countertops, Wall Counter Spaces, and Island Counter Spaces	56	(2)
210.52(D) and Exception Dwelling Unit Bathrooms	58	(1)
210.52(E) Dwelling Unit Outdoor Receptacle Outlets	59	(1)
210.60(A) Guest Rooms or Guest Suites, General	60	(2)
210.63 Exception Heating, Air-Conditioning, and Refrigeration Equipment Outlet	62	(1)
210.70(B) Lighting Outlets Required, Guest Rooms or Guest Suites	63	(2)
215.2(A)(1) Minimum Rating and Size, Feeders Not More Than 600 Volts, General	65	(2)
215.12 Identification of Feeders	67	(1)
Article 220 Branch-Circuit, Feeder, and Service Calculations	68	(2)
220.82(C) and Example D2(c) Dwelling Unit, Heating and Air-Conditioning Load	70	(2)
225.17 Masts as Supports	72	(1)
225.22 Raceways on Exterior Surfaces of Buildings or Other Structures	73	(1)
225.30 Number of Supplies, Special Conditions	74	(2)
230.2(A)(6) Number of Services, Special Conditions	76	(2)
230.40 Exception No. 1 Number of Service-Entrance Conductor Sets	78	(2)
230.71(A) Maximum Number of Disconnects, General	80	(2)
230.72(B) Additional Service Disconnecting Means	82	(2)
230.82(2) and (3) Equipment Connected to the Supply Side of Service Disconnect	84	(2)
230.82(8) Equipment Connected to the Supply Side of Service Disconnect	86	(1)
240.2 Supervised Industrial Installation	87	(1)
240.20(B)(1), (2), and (3) Circuit Breaker as Overcurrent Device	88	(1)
240.21(B) Feeder Taps	89	(1)
240.21(B)(3)(2) Taps Supplying a Transformer [Primary Plus Secondary Not Over 7.5 m (25 ft) Long]	90	(2)
240.21(C) Transformer Secondary Conductors	92	(2)
240.21(C)(2)(1) Transformer Secondary Conductors Not Over 3 m (10 ft) Long	94	(2)
240.24 Location in or on Premises, Accessibility	96	(1)
240.60(D) (New) Renewable Fuses	97	(1)
240.86 Series Ratings	98	(2)
Article 250 Grounding and Bonding	100	(1)
250.2 Effective Ground-Fault Current Path	101	(1)
250.8 Connection of Grounding and Bonding Equipment	102	(1)
250.21 Alternating-Current Systems of 50 Volts to 1000 Volts Not Required to Be Grounded	103	(2)
250.28 Main Bonding Jumper and System Bonding Jumper	105	(2)
250.30 Grounding Separately Derived Alternating-Current Systems	107	(6)
250.32 Buildings or Structures Supplied by Feeder(s) or Branch Circuit(s)	113	(2)
250.50 Grounding Electrode System	115	(2)
250.52(A)(2) Metal Frame of the Building or Structure	117	(2)
250.64(C) Grounding Electrode Conductor Installation, Continuous	119	(2)
250.64(D) Grounding Electrode Conductor Taps	121	(2)
250.64(E) Enclosures for Grounding Electrode Conductors	123	(2)
250.68(A) Exception No. 2 (New) Grounding Electrode Conductor and Bonding Jumper Connection to Grounding Electrodes, Accessibility	125	(2)
250.100 Bonding in Hazardous (Classified) Locations	127	(1)
250.118(5)(d) and (6)(e) Types of Equipment Grounding Conductors, Flexible Metal Conduit and Liquidtight Flexible Metal Conduit	128	(2)
250.119 Identification of Equipment Grounding Conductors	130	(2)
250.122(G) Size of Equipment Grounding Conductors, Feeder Taps	132	(2)
250.142(B) Exception No. 2 Use of Grounded Circuit Conductor for Grounding Equipment	134	(1)
250.146(A) Connecting Receptacle Grounding Terminal to Box, Surface Mounted Box	135	(1)
250.148 Continuity and Attachment of Equipment Grounding Conductors to Boxes	136	(2)
250.184 Part X Grounding of Systems and Circuits of 1 kV and Over (High Voltage), Solidly Grounded Neutral Systems	138	(3)
280.4(A) Surge Arrester Selection, Circuits of Less Than 1000 Volts	141	(2)
285.3 Transient Voltage Surge Suppressor, Uses Not Permitted	143	(1)
Wiring Methods and Materials, Articles 300--398	144	(60)
300.4(A)(1) Exception No. 2 (New) and 300.4(A)(2) Cables and Raceways Through Wood Members, Bored Holes and Notches in Wood	146	(2)
300.4(D) Cables and Raceways Parallel to Framing Members and Furring Strips	148	(1)
300.5(B) Underground Installations, Listing	149	(1)
300.6 Protection Against Corrosion and Deterioration	150	(2)
300.11(A)(1) Securing and Supporting, Fire-Rated Assemblies	152	(1)
300.15(L) Manholes and Handholes	153	(2)
300.22(B) Ducts or Plenums Used for Environmental Air	155	(1)
310.4 Conductors in Parallel	156	(3)
310.5 Minimum Size of Conductors	159	(1)
310.6, Exception Shielding	160	(2)
310.8(D) Locations Exposed to Direct Sunlight	162	(1)
310.10, FPN No. 2 (New) Temperature Limitation of Conductors	163	(2)
310.15(B)(2)(a) and FPN No. 2 Adjustment Factors, More Than Three Current-Carrying Conductors in a Raceway or Cable	165	(2)
312.2(A) Damp and Wet Locations	167	(2)
312.4 (New) Repairing Plaster and Drywall or Plasterboard	169	(1)
Article 314 Outlet, Device, Pull, and Junction Boxes; Conduit Bodies; Fittings and Handhole Enclosures	170	(2)
314.16(B)(1) Box Fill Calculations, Conductor Fill	172	(2)
314.23(B)(1) Nails and Screws	174	(1)
314.27(D) Boxes at Ceiling-Suspended (Paddle) Fan Outlets	175	(1)
314.30 (New) Handhole Enclosures	176	(2)
320.10 and 320.12 Armored Cable: Type AC, Uses Permitted and Uses Not Permitted	178	(2)
320.30 Type AC Cable, Securing and Supporting	180	(2)
320.80(A) Type AC Cable, Ampacity, Thermal Insulation	182	(1)
334.12(A) Type NM Cable, Uses Not Permitted	183	(2)
334.15(B) Type NM Cable, Protection From Physical Damage	185	(1)
334.30 Type NM Cable, Securing and Supporting	186	(1)
334.80 Type NM Cable, Ampacity	187	(2)
342.22 Intermediate Metal Conduit, Number of Conductors	189	(2)
344.24 Rigid Metal Conduit, Bends---How Made	191	(1)
348.30(A) Exception No. 2 Flexible Metal Conduit, Securely Fastened	192	(2)
352.12(E) Rigid Nonmetallic Conduit, Uses Not Permitted, Insulation Temperature Limitations	194	(2)
Article 353 High Density Polyethylene Conduit: Type HDPE Conduit	196	(2)
372.17 Cellular Concrete Floor Raceways, Ampacity of Conductors	198	(1)
376.23(A) and (B) Metal Wireways, Insulated Conductors	199	(2)
378.23(A) and (B) Nonmetallic Wireways, Insulated Conductors	201	(2)
392.4 Cable Trays, Uses Not Permitted	203	(1)
Equipment for General Use, Articles 400-490	204	(60)
400.5 Ampacities for Flexible Cords and Cables	206	(2)
400.8(7) Flexible Cord, Uses Not Permitted	208	(1)
404.9(B) Exception Provisions for General-Use Snap Switches, Grounding	209	(2)
406.4(A) and (B) Receptacle Mounting	211	(1)
406.4(D) Exception Nos. 1 and 2 Position of Receptacle Faces	212	(2)
406.6(A), (B), and (D) Attachment Plugs, Cord Connectors, and Flanged Surface Devices	214	(1)
406.8(B)(1), (2), (C), and (E) Receptacles in Wet Locations	215	(2)
408.4 Circuit Directory or Circuit Identification	217	(1)
408.7 Switchboards and Panelboards, Unused Openings	218	(1)
Article 409 Industrial Control Panels	219	(2)
410.4(D) Bathtub and Shower Areas	221	(2)
410.4(E) Luminaires (Fixtures) in Indoor Sports, Mixed-Use, and All-Purpose Facilities	223	(1)
410.18(B) Exception No. 2 Exposed Luminaire (Fixture) Parts Made of Insulating Materal	224	(2)
410.73(F)(5) High-Intensity Discharge Luminaires (Fixtures), Metal Halide Lamp Containment	226	(2)
410.73(G) High-Intensity Discharge Luminaires (Fixtures), Disconnecting Means	228	(3)
422.13 Storage-Type Water Heaters	231	(2)
422.16(B)(4) Flexible Cords for Specific Appliances, Range Hoods	233	(2)
422.31(B) Disconnection, Appliances Rated Over 300-Volt-Amperes or 1/8 Horsepower	235	(2)
422.51 Cord-and-Plug-Connected Vending Machines	237	(2)
424.3(B) Fixed Electric Space-Heating Equipment, Branch-Circuit Sizing	239	(2)
430.6(A)(1), Tables 430.248, 430.249, 430.250 Ampacity and Motor Rating Determinations, General Motor Applications, Table Values	241	(2)
430.8, Exceptions Marking on Controllers	243	(2)
430.32(A) Continuous-Duty Motors, More Than 1 Horsepower	245	(1)
430.102(B), Exception Disconnecting Means, Motor	246	(2)
430.109(A)(6) Manual Motor Controller	248	(1)
430.2 and 430.109(A)(7) System Isolation Equipment	249	(3)
430.2 and Article 430 Part X Adjustable Speed Drives	252	(2)
440.4(B), Exception Multimotor and Combination-Load Equipment	254	(2)
440.14 Exception No. 1 Disconnecting Means, Location	256	(2)
440.32 Single Motor Compressor	258	(1)
445.11 Marking	259	(1)
445.18 Disconnecting Means Required for Generators	260	(1)
450.5 Grounding Autotransformers	261	(1)
490.46 Metal-Enclosed and Metal-Clad Service Equipment	262	(2)
Special Occupancies, Articles 500--590	264	(54)
500.2 Purged and Pressurized	266	(1)
500.7(K) Combustible Gas Detection System	267	(2)
501.10(B)(6) Wiring Methods, Class I, Division 2 Areas	269	(1)
501.15(B)(2), and Exception No.2 Conduit Seals, Class I, Division 2 Boundary	270	(2)
501.15(F)(3) Sealing and Drainage, Canned Pumps, Process, or Service Connections, etc.	272	(2)
501.25, 502.25, 503.25, 505.19 Uninsulated Exposed Parts, Class I, Divisions 1 & 2; Class II, Divisions 1 & 2; Class III, Divisions 1 & 2	274	(2)
502.15(4) Sealing, Class II, Divisions 1 and 2	276	(2)
502.10(A)(2) Class II, Division 1, Flexible Connections	278	(2)
503.10(A)(3) Class III Wiring Methods, Nonincendive Field Wiring	280	(1)
Article 506 Zone 20, 21, and 22 Locations for Combustible Dusts, Fibers, and Flyings	281	(2)
511.3 Commercial Garages, Repair and Storage, Classification of Locations	283	(2)
511.4 Commercial Repair Garage, Wiring and Equipment in Class I Locations	285	(1)
513.12 Aircraft Hangars, Ground-Fault Circuit-Interrupter Protection for Personnel	286	(1)
514.2, Table 514.3(B)(1) Motor Fuel Dispensing Facility, Table 514.3(B)(1) Class I Locations---Motor Fuel Dispensing Facilities	287	(2)
514.8 Motor Fuel Dispensing Facilities, Underground Wiring	289	(2)
516.3 Classification of Locations	291	(3)
517.13(A), (B) Grounding of Receptacles and Fixed Electric Equipment in Patient Care Areas	294	(2)
517.17(A) Health Care Facilities, Ground-Fault Protection	296	(2)
517.30(C)(3) Essential Electrical Systems for Hospitals, Mechanical Protection of the Emergency System	298	(2)
Article 518, 518.2 Assembly Occupancies	300	(2)
518.4(C) Assembly Occupancies, Wiring Methods, Spaces with Finish Rating	302	(2)
525.10, 525.11 Services, Multiple Sources of Supply	304	(2)
525.23 Ground-Fault Circuit-Interrupter (GFCI) Protection	306	(2)
547.5(G) Agricultural Buildings, Receptacles	308	(1)
547.9 Electric Supply to Building(s) or Structure(s) From a Distribution Point	309	(2)
547.10 Equipotential Plane Requirements for Agricultural Buildings	311	(2)
555.21 and 555.22 Motor Fuel Dispensing Stations, Repair Facilities	313	(2)
Article 590 Temporary Installations	315	(1)
590.4(B) and (C) Temporary Installations, Feeders and Branch Circuits	316	(2)
Special Equipment, Articles 600--695	318	(48)
600.2, 600.8, 600.24 Section Sign, Enclosures, Class 2 Power Sources	320	(2)
604.6(E) Manufactured Wiring Systems, Securing and Supporting	322	(1)
605.6, 605.7 Office Furnishings, Fixed-Type Partitions and Freestanding-Type Partitions	323	(2)
610.61 Cranes and Hoists, Grounding	325	(1)
620.22(A) Elevators, Etc., Car Light Source	326	(1)
625.2 Electric Vehicle	327	(1)
625.25, 625.26 Loss of Primary Source and Interactive Systems	328	(1)
640.6 Mechanical Execution of Work	329	(1)
FPN to 670.1 Industrial Machinery, Scope	330	(2)
680.8 Swimming Pools and Similar, Overhead Conductor Clearances	332	(1)
680.12 Swimming Pools and Similar, Maintenance Disconnecting Means	333	(1)
680.21(A)(4) Swimming Pools and Similar, One-Family Dwellings	334	(2)
680.23(B)(2) Swimming Pools and Similar, Wiring Extending Directly to the Forming Shell	336	(1)
680.23(B)(6) Wet-Niche Luminaires (Fixtures), Servicing	337	(1)
680.26 Swimming Pools and Similar, Equipotential Bonding	338	(4)
680.32, 680.34 Storable Pools, Ground-Fault Circuit Interrupters Required, Receptacle Locations	342	(1)
680.51(A) Fountains, Ground-Fault Circuit Interrupter	343	(1)
680.74 Hydromassage Bathtubs, Bonding	344	(2)
Article 682 Natural and Artificially Made Bodies of Water	346	(4)
685.1 Integrated Electrical Systems, Scope	350	(2)
690.2, 690.31(E) Building Integrated Photovoltaics, Wiring Methods Permitted	352	(2)
690.14(D) Utility Interactive-Inverters Mounted in Not-Readily Accessible Locations	354	(2)
690.47(C) Photovoltaic Systems With Alternating-Current and Direct-Current Grounding Requirements	356	(2)
692.1 Fuel Cell Systems, Scope	358	(1)
695.3(A)(1) Electric Utility Service Connection for Fire Pumps	359	(1)
695.4(B)(1) and (B)(2)(3) Supervised Connection, Overcurrent Device Selection, Disconnecting Means	360	(2)
695.5(B) and (C)(2) Overcurrent Protection for Transformers, Overcurrent Protection for Feeders	362	(2)
695.6(C)(2), (D), (E), and (H) Power Wiring for Fire Pumps, Overcurrent Protection, Pump Wiring, and Ground-Fault Protection Prohibition	364	(2)
Special Conditions, Articles 700--780	366	(26)
700.5(B) Emergency Systems, Selective Load Pickup, Load Shedding, and Peak Load Shaving	368	(2)
700.12(B)(6) Emergency System, Outdoor Generator Sets	370	(1)
700.12(D) Emergency Systems, Separate Service	371	(2)
700.12(E) Emergency Systems, Fuel Cell System	373	(2)
700.27, 701.18 Emergency Systems and Legally Required Standby Systems, Coordination	375	(2)
702.6 Exception Optional Standby Systems, Transfer Equipment	377	(2)
702.7 Exception Optional Standby Systems, Signals	379	(1)
702.11 Optional Standby Systems, Sources of Power	380	(1)
725.3(B) Spread of Fire or Products of Combustion	381	(1)
725.3(C) Ducts, Plenums, and Other Air-Handling Spaces	382	(1)
725.42 Circuit Marking	383	(1)
725.56(F) Class 2 or Class 3 Conductors or Cables and Audio System Circuits	384	(1)
725.61(D)(2) Intrinsically Safe Circuits and Nonincendive Field Wiring	385	(1)
760.21 Non-Power-Limited Fire Alarm Circuit Power Source Requirements	386	(2)
760.41 Power Sources for Power-Limited Fire Alarm Circuits	388	(2)
760.61(A), 760.61(B), and 760.61(C) Applications of Listed Power-Limited Fire Alarm Cables	390	(2)
Communication Systems, Articles 800--830; and Annexes	392	(12)
800.2 Communications Circuit Integrity (CI) Cable	394	(1)
800.100(A)(4) FPN Primary Protector Grounding Conductor	395	(1)
800.113 Installation and Marking of Communications Wires and Cables	396	(2)
Annex D, Example D3(a) D3(a) Industrial Feeders in a Common Raceway	398	(5)
Annex E Types of Construction	403	(1)
Index	404