Electrical Raceways and Other Wiring Methods : Based on the 2005 National Electric Code

by Loyd, Richard E.

• ISBN13: 9781401851835
• ISBN10: 1401851835
• Edition: 5th
• Format: Paperback
• Copyright: 2004-12-01
• Publisher: Cengage Learning

Summary

Combination design and reference resource contains specific design criteria, wiring methods, and materials for all types of installations as required by the National Electrical Code 2005. Chapter topics discuss conductor considerations, hazardous locations, raceway systems, and more. Previous edition: c2002. Softcover.

Table of Contents

Foreword	ix
Preface	xiii
Acknowledgments	xvii
About the Author	xix
Codes and Standards in Wiring and Building Design	1	(14)
Purpose	1	(1)
National Fire Protection Association Standards	2	(6)
American National Standards Institute	8	(1)
NEMA and IEC Standards	9	(1)
The Steel Tube Institute of North America	9	(1)
Federal Government Standards	10	(1)
Local Codes and Requirements	10	(1)
Insurance Requirements	10	(1)
Approved Testing Laboratories	10	(3)
Occupational Safety and Health Act	13	(1)
Review Questions	13	(2)
Basic Design Factors	15	(14)
Safety	15	(1)
Capacity	15	(1)
Flexibility	16	(1)
Electrical Systems and Building Fires	16	(1)
Fire Resistance and Spread of Fire and Smoke	16	(1)
Voltage Selection	17	(1)
Distribution	17	(2)
Utilization	19	(2)
Electromagnetic Fields Theory	21	(2)
Harmonics Effects on the Electrical System	23	(4)
Harmonics, the Problem	27	(1)
Review Questions	27	(2)
Conductor Considerations	29	(32)
Ambient Temperature Considerations	29	(2)
Insulation	31	(7)
Conductor Ampacity Adjustment Factors	38	(1)
Allowable Conductor Fill (More Than Three Conductors in a Raceway)	38	(4)
Voltage Drop	42	(2)
Conductors Run in Parallel	44	(2)
Neutral Conductor (Grounded Conductor)	46	(2)
Equipment Grounding Conductors	48	(8)
Capable of Carrying the Available Fault Current	56	(4)
Review Questions	60	(1)
General Circuit Requirements	61	(24)
Overcurrent	63	(1)
Heating	64	(1)
Magnetic	64	(1)
Circuit Breakers	65	(2)
Fuses	67	(4)
Branch Circuits	71	(2)
Color Coding	73	(1)
Feeder-Circuit Conductors	74	(4)
Service-Entrance Conductors	78	(5)
Review Questions	83	(2)
General Raceway Installation Requirements	85	(32)
Protection Against Physical Damage	85	(2)
Underground Requirements	87	(2)
Exposure to Different Temperatures	89	(1)
Expansion Properties of Raceways	90	(3)
Securing and Supporting Requirements	93	(1)
Mechanical and Electrical Continuity	94	(1)
Induction Heating	94	(3)
Resistance to Deterioration from Corrosion and Reagents	97	(4)
Penetration of Fire-Resistant Assemblies	101	(3)
Combustibility of Raceway Materials and Conductor Insulation	104	(1)
Wiring in Ducts, Plenums, and Other Air-Handling Spaces	105	(1)
Raceway Allowable Conductor Fill	106	(1)
Conduit and Tubing Bending	107	(7)
Review Questions	114	(3)
Raceway Systems	117	(36)
History of Raceway	117	(1)
Advantages of Raceway Systems	118	(2)
Types of Metallic Raceway Systems	120	(13)
Types of Nonmetallic Raceways	133	(8)
Cable Tray Support Systems---NEC Article 392	141	(4)
Other Types of Raceways	145	(5)
Review Questions	150	(3)
Other Wiring Methods	153	(16)
Open Wiring on Insulators---NEC Article 398	153	(1)
Messenger-Supported Wiring---NEC Article 396	153	(1)
Concealed Knob-and-Tube Wiring---NEC Article 394	154	(1)
Integrated Gas-Spacer Cable, Type IGS---NEC Article 326	154	(1)
Medium-Voltage Cable, Type MV---NEC Article 328	154	(1)
Flat Conductor Cable, Type FCC---NEC Article 324	155	(1)
Mineral-Insulated, Metal-Sheathed Cable, Type MI---NEC Article 332	156	(1)
Armored Cable, Type AC---NEC Article 320	157	(1)
Metal-Clad Cable, Type MC---NEC Article 330	158	(2)
Nonmetallic-Sheathed Cable, Types NM and NMC, and NMS---NEC Article 334	160	(1)
Service-Entrance Cable, Types SE and Use---NEC Article 338	161	(1)
Underground Feeder and Branch-Circuit Cable, Type UF---NEC Article 340	162	(1)
Power and Control Tray Cable, Type TC---NEC Article 336	163	(1)
Instrumentation Tray Cable, Type ITC---NEC Article 727	164	(1)
Nonmetallic Extensions---NEC Article 382	164	(1)
Underground Cable in Nonmetallic Conduit with Conductors, Type NUCC---NEC Article 354	165	(1)
Flat Cable Assemblies, Type FC---NEC Article 322	165	(1)
Review Questions	166	(3)
Boxes, Enclosures, Fittings, and Accessories	169	(22)
Enclosure Application and Installation Guidelines	169	(3)
Bushings	172	(1)
Couplings and Connectors	172	(3)
Conduit Bends and Elbows	175	(1)
Conduit Bodies---NEC Article 314	176	(2)
Outlet Device, Pull, and Junction Boxes---NEC Article 314	178	(3)
Fixture and Fan Support	181	(1)
Cables and Conductors in Raceway Required Supports	182	(1)
Cabinets and Cutout Boxes---UL 50, NEC Article 312	183	(2)
Hardware, Supports, Clips, and Straps	185	(1)
Switchboards and Panelboards---NEC Article 408	186	(2)
Review Questions	188	(3)
Hazardous Locations	191	(36)
Code Classifications	193	(2)
Hazardous Locations and the NEC	195	(4)
Class I	199	(4)
Equipment for Class I Locations---Divisions 1 and 2	203	(1)
Wiring Methods---Divisions 1 and 2	204	(3)
Sealing Requirements---Divisions 1 and 2	207	(2)
Class II	209	(1)
Wiring Methods	209	(3)
Sealing Requirements	212	(1)
Class III Locations	212	(1)
Wiring Methods	213	(1)
Sealing Requirements	213	(1)
Zone 20, 21, and 22 Locations for Flammable Dusts, Fibers, and Flyings---NEC Article 506	213	(1)
Commercial Garages, Repair, and Storage---NEC Article 511	214	(2)
Aircraft Hangars---NEC Article 513	216	(1)
Motor Fuel Dispensing Facilities and Bulk Storage Plants---NEC Article 514 and Article 515	216	(4)
Spray Application, Dipping, and Coating Processes---NEC Article 516	220	(3)
Health Care Facilities, Residential and Custodial Facilities, and Limited Care Facilities	223	(1)
Intrinsically Safe Systems---NEC Article 504	224	(1)
Nonincendive Components	225	(1)
Review Questions	225	(2)
ANNEX Codes and Standards	227	(58)
Figure A--1 Allowable Ampacity of Multiple Conductors in Raceway	227	(2)
Figure A--2 Table B: Impedance Factors for Finding Voltage Drop in Copper Conductors	229	(1)
Figure A--3 General Lighting Loads	230	(2)
Figure A--4 Uses for Raceway and Other Wiring Methods	232	(1)
Figure A--5 Load and Circuit Chart for Residential Electrical Systems	233	(1)
Figure A--6 Basic Electrical Formulas	234	(3)
Figure A--7 Electrical Wiring Symbols	237	(4)
Figure A--8 Table F: Approximate Diameters for Conduit, Locknuts, and Bushings	241	(1)
Figure A--9 Table G: Recommended Minimum Spacing of Rigid Steel Conduit and EMT at Junction and Pull Boxes	241	(1)
Figure A--10 ID and OD Type AC Cable	242	(20)
Figure A--11 Kwik Fittings Conduit and Tubing	262	(1)
Figure A--12 Environmental Resistance Ratings---Nonmetallic Wiring Methods	263	(1)
Figure A--12a Chemical Resistance of Fiberglass Pipe Resins	264	(5)
Figure A--13 Chemical Resistance Charts---Coated Conduit (Metal)	269	(2)
Figure A--14 Table 1: Hazardous Substances Flashpoint, Ignition Temperatures---Gases and Vapors	271	(3)
Figure A--14a Table 2: Hazardous Substances Flashpoint, Ignition Temperatures---Dust	274	(2)
Figure A--15 American Wire Gauge Table	276	(1)
Figure A--16 Maximum Length of EMT as Equipment Grounding Circuit Conductor	277	(1)
Figure A--17 Maximum Length of IMC as Equipment Grounding Circuit Conductor	278	(1)
Figure A--18 Maximum Length of GRC as Equipment Grounding Circuit Conductor	279	(1)
Figure A--19 Maximum Length of EGC as Equipment Grounding Circuit Conductor	280	(1)
Figure A--20A Maximum Length EGC (Steel EMT, IMC, GRC, and Copper, Copperclad, or Aluminum Wire) as Return Fault Path to Overcurrent Device	281	(1)
Figure A--20B Maximum Length EGC (Steel EMT, IMC, GRC, and Copper, Copperclad, or Aluminum Wire) as Return Fault Path to Overcurrent Device	282	(1)
Figure A--21a Comparison of the Two Systems for Hazardous Locations	283	(1)
Figure A--21b Alternative Area Classification	284	(1)
Index	285