Audel Installation Requirements of the 2002 National Electrical Code

Overview

A practical guide to the 2002 NEC

As an electrician, your interest in the NEC is application specific. You need the parts that relate to your job, clearly organized so you can find what you need, and geared to what you do. This book is the 2002 NEC for the installer, with easy-to-follow chapter headings to help you find important information quickly, and explanations that ...

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Overview

A practical guide to the 2002 NEC

As an electrician, your interest in the NEC is application specific. You need the parts that relate to your job, clearly organized so you can find what you need, and geared to what you do. This book is the 2002 NEC for the installer, with easy-to-follow chapter headings to help you find important information quickly, and explanations that make sense. You'll want it with you on every job.
* Find those parts of the NEC that matter to your job - nothing more
* Understand all general and basic requirements
* Identify specific standards for multiple buildings sharing service
* Know the rules regarding surge arrestors, grounding connections for AC systems, and grounding for separately derived systems
* Review the requirements for wiring in all types of cable and conduit
* Look into code requirements for specialized applications like hospitals, motion picture studios and theaters, RV parks, and swimming pools

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Product Details

  • ISBN-13: 9780764542787
  • Publisher: Wiley
  • Publication date: 1/2/2004
  • Edition description: All New Edition
  • Edition number: 1
  • Pages: 288
  • Product dimensions: 8.50 (w) x 5.50 (h) x 0.66 (d)

Meet the Author

Paul Rosenberg is a master electrician and a leading voice in the electrical industry. An instructor at Iowa State University, he has written training courses for NECA and articles for all major industry publications as well as Audel Electrician’s Pocket Manual, 2nd Edition.

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Table of Contents

Introduction.

Chapter 1: General Requirements.

General Requirements (Article 110).

Basic Requirements (Article 110).

Use of Grounded Conductors (Article 200).

Chapter 2: Branch Circuits.

Branch Circuits (Article 210).

Classifications.

Grounded Conductors.

Voltages.

Receptacles and Cord Connectors.

Ground-Fault Circuit Interrupters.

Arc-Fault Circuit Interrupters.

Branch-Circuit Ratings.

Appliance Outlets.

Chapter 3: Feeders.

Feeders (Article 215).

Ratings and Sizes.

Grounding and Other Requirements.

Outdoor Feeders or Branch Circuits.

Chapter 4: Services.

Services (Article 230).

Service Conductors.

Service Clearances.

Underground Service Conductors.

Wiring Methods.

Service Equipment.

Overcurrent Protection.

Services Over 600 Volts.

;Chapter 5: Overcurrent Protection.

Overcurrent Protection (Article 240).

Taps.

Locations.

Fuses and Circuit Breakers.

Chapter 6: Grounding.

Grounding (Article 250).

Circuit and System Grounding.

Location of Grounding Conductors.

AC System Grounding Connections.

Two or More Buildings Supplied by a Common Service.

Disconnecting Means Located in Separate Building on Same Premises.

Conductor to Be Grounded.

Grounding for Separately Derived Systems.

High-Impedance Grounded Neutral Connections.

Grounding of Enclosures.

Equipment Grounding.

Methods of Grounding.

Bonding.

Grounding Electrode Systems.

Grounding Conductors.

Grounding Conductor Connections.

Isolated Grounding.

Other Requirements.

Surge Arrestors (Article 280).

Chapter 7: Wiring Requirements.

Wiring Methods (Article 300).

General.

Protection of Conductors.

Underground Wiring.

Raceways.

Boxes.

Conductors.

Temporary Wiring (Article 527).

Conductors for General Wiring (Article 310).

Identification of Conductors.

Chapter 8: Wiring in Cable.

Cable Tray Systems (Article 392).

Uses and Locations.

Installation.

Cable Installation.

Number of Cables.

Ampacities of Conductors.

Open Wiring on Insulators (Article 398).

Uses Permitted.

Installation.

Messenger-Supported Wiring (Article 396).

Uses and Locations.

Installation.

Concealed Knob-and-Tube Wiring (Article 394).

Uses and Locations.

Installation.

Integrated Gas Spacer Cable (Article 326).

Uses and Locations.

Installation.

Medium-Voltage Cable (Article 328).

Uses and Locations.

Flat Conductor Cable (Article 324).

Uses and Locations.

Installation.

Mineral-Insulated Metal-Sheathed Cable (Article 332).

Uses and Locations.

Installation.

Armored Cable (Article 320).

Uses and Locations.

Installation.

Metal-Clad Cable (Article 330).

Uses and Locations.

Installation.

Nonmetallic-Sheathed Cable (Article 334).

Uses and Locations.

Installation.

Type NMS.

Uses and Locations.

Installation.

Service-Entrance Cable (Article 338).

Uses Permitted.

Installation.

Underground Feeder and Branch-Circuit Cable (Article 340).

Uses and Locations.

Installation.

Power and Control Tray Cable (Article 336).

Uses and Locations.

Installation.

Nonmetallic Extensions (Article 382).

Uses and Locations.

Installation.

Flat Cable Assemblies (Article 322).

Uses and Locations.

Installation.

Chapter 9: Wiring in Conduit.

Electrical Metallic Tubing (EMT, Thin-Wall) (Article 358).

Uses and Locations.

Installation.

Wire Fills.

Rigid Metal Conduit (RMC or Heavy-Wall) (Article 344).

Uses and Locations.

Installation.

Wire Fills.

Intermediate Metal Conduit (IMC) (Article 342).

Uses and Locations.

Installation.

Wire Fills.

Rigid Nonmetallic Conduit (RNC) (Article 352).

Uses and Locations.

Installation.

Wire Fills.

Flexible Metal Conduit (Greenfield or Flex) (Article 348).

Uses and Locations.

Installation.

Wire Fills.

Flexible Metallic Tubing (Article 360).

Uses and Locations.

Installation.

Wire Fills.

Liquid-Tight Flexible Metallic Conduit (LFMC) (Article 350).

Uses and Locations.

Installation.

Wire Fills.

Liquid-Tight Flexible Nonmetallic Conduit (LFNC) (Article 356).

Uses and Locations.

Installation.

Wire Fills.

Chapter 10: Raceways and Wireways.

Surface Metal Raceways (Article 386).

Uses and Locations.

Installation.

Wire Fills.

Surface Nonmetallic Raceways (Article 388).

Uses and Locations.

Installation.

Wire Fills.

Multi-Outlet Assemblies (Article 380).

Uses and Locations.

Installation.

Underfloor Raceways (Article 390).

Uses and Locations.

Installation.

Wire Fills.

Cellular Metal Floor Raceways (Article 374).

Description.

Where Not Permitted.

Installation.

Wire Fills.

Cellular Concrete Floor Raceways (Article 372).

Description.

Where Not Permitted.

Installation.

Wire Fills.

Metal Wireways (Article 376).

Uses and Locations.

Installation.

Wire Fills.

Auxiliary Gutters (Article 366).

Description.

Uses.

Installation.

Wire Fills.

Chapter 11: Busways.

Busways (Busduct) (Article 368).

Uses and Locations.

Installation.

Cablebus (Article 370).

Uses and Locations.

Installation.

Chapter 12: Outlet and Pull Boxes.

Outlet, Device, Pull, and Junction Boxes; Conduit Bodies, Fittings, and Manholes (Article 314).

Uses.

Wire Fills.

Pull Boxes.

Cabinets and Cutout Boxes (Article 312).

Installation.

Chapter 13: Switches and Switchboards.

Switches (Article 404).

Installation.

Knife Switches.

Switchboards and Panelboards (Article 408).

Installation.

Chapter 14: Cords.

Flexible Cords and Cables (Article 400).

Uses.

Installation.

Portable Cables Over 600 Volts.

Chapter 15: Lighting Fixtures.

Lighting Fixtures, Lampholders, and Lamps (Article 410).

Installation.

Fixtures in Clothes Closets.

Track Lighting.

Chapter 16: Receptacles.

Receptacles, Cord Connectors, and Attachment Plugs (Article 406).

Receptacles.

Attachment Plugs and Cord Connectors.

Chapter 17: Appliances.

Appliances (Article 422).

Branch Circuits.

Installation.

Fixed Electric Space-Heating Equipment (Article 424).

Branch Circuits.

Installation.

Electric Space-Heating Cables.

Duct Heaters.

Ice and Snow Melting Equipment (Article 426).

Installation.

Chapter 18: Motors and Controllers.

Motor Circuits, Controllers (Article 430).

Adjustable-Speed Drive Systems.

Part-Winding Motors.

Motor Ratings and Ampacity Ratings.

Torque Motors.

AC Adjustable-Voltage Motors.

Motor Locations.

Motor Circuit Conductors.

Conductors Supplying Several Motors or Phase Converters.

Conductors Supplying Motors and Other Loads.

Overload Protection.

Short-Circuit and Ground-Fault Protection.

Motor Control Circuits.

Motor Controllers.

Grounding.

Chapter 19: HVAC Equipment.

Air-Conditioning and Refrigeration Equipment (Article 440).

Disconnecting Means.

Branch Circuits.

Controllers and Overload Protection.

Room Air Conditioners.

Chapter 20: Generators.

Generators (Article 445).

Locations.

Overcurrent Protection.

Installation.

Chapter 21: Transformers.

Transformers (Article 450).

Overcurrent Protection.

Installation.

Chapter 22: Capacitors, Resistors, and Batteries.

Capacitors (Article 460).

Conductors.

Resistors and Reactors (Article 470).

Installation.

Storage Batteries (Article 480).

Installation.

Chapter 23: Hazardous Locations.

Hazardous Locations (Articles 500, 501, 502, 503, 504).

General.

Class I Locations.

Class II Locations.

Class III Locations.

Intrinsically Safe Systems.

Commercial Garages (Article 511).

Airplane Hangars (Article 513).

Chapter 24: Service Stations.

Gasoline Dispensing and Service Stations (Article 514).

Installation.

Chapter 25: Bulk Storage Plants.

Bulk Storage Plants (Article 515).

Installation.

Chapter 26: Spray Areas.

Spray Application, Dipping, and Coating Processes (Article 516).

Installation.

Chapter 27: Health Care Facilities.

Health Care Facilities (Article 517).

General Areas.

Patient Care Areas.

Chapter 28: Places of Assembly, Theaters, Motion Picture and Television Studios.

Places of Assembly (Article 518).

Theaters (Article 520).

Motion Picture and Television Studios (Article 530).

Chapter 29: Signs.

Installation.

Chapter 30: Manufactured Wiring Systems.

Manufactured Wiring Systems (Article 604).

Installation.

Office Furnishings (Article 605).

Installation.

Chapter 31: Mobile Homes and RV Parks.

Mobile Homes (Article 550).

Service Equipment.

Power Supply.

Disconnecting Means.

Branch Circuits.

Receptacles.

Grounding.

Recreational Vehicle Parks (Article 551).

Electric Service at Sites.

Distribution.

Supply Equipment.

Underground Service, Feeder, and Branch-Circuit Conductors.

Chapter 32: Data Processing Areas.

Information Technology Equipment (Article 645).

Application.

Supply Circuits and Cables.

Power.

Grounding.

Chapter 33: Swimming Pools.

Swimming Pools (Article 680).

Power Supply and Circuits.

Underwater Lighting.

Bonding.

Underwater Audio Equipment.

Grounding Requirements.

Chapter 34: Solar Electric Systems.

Solar Photovoltaic Systems (Article 690).

Installation.

Disconnecting Means.

Wiring.

Grounding.

Source Connections.

Storage Batteries.

Chapter 35 Emergency Systems.

Emergency Systems (Article 700).

Circuit Wiring.

Legally Required Standby Systems (Article 701).

Optional Standby Systems (Article 702).

Chapter 36 High Voltage.

Wiring Over 600 Volts (Article 490).

Wiring Methods.

Underground Conductors.

Equipment.

Electrode-Type Boilers.

Chapter 37: Low Voltage.

Circuits and Equipment Operating at Less Than 50 Volts (Article 720).

Class 1, 2, or 3 Remote-Control, Signaling, and Power-Limited Circuits (Article 725).

Classifications.

Class 1 Circuits.

Class 2 and Class 3 Circuits.

Chapter 38: Fiber-Optic Cables.

Optical Fiber Cables (Article 770).

Brief Explanation.

Installation.

Types and Uses.

Chapter 39: Communications.

Communications Systems (Article 800).

Conductors Entering Buildings.

Protection.

Communications Conductors in Buildings.

Chapter 40: Special Installations.

Lightning Protection Systems (Not in NEC).

Closed-Loop and Programmed Power Distribution (Article 780).

Radio and Television Equipment (Article 810).

Community Antenna TV and Radio Distribution Systems (Article 820).

Fire Alarm Systems (Article 760).

Interconnected Electrical Power Sources (Article 705).

Irrigation Machines (Article 675).

Industrial Machinery (Article 670).

Electroplating (Article 669).

Electrolytic Cells (Article 668).

Pipe Organs (Article 650).

X-Ray Equipment (Article 660).

Induction Heating Equipment (Article 665).

Sound Recording Equipment (Article 640).

Electric Welders (Article 630).

Elevators (Article 620).

Marinas and Boatyards (Article 555).

Agricultural Buildings (Article 547).

Floating Buildings (Article 553).

Glossary.

Index.

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First Chapter

Audel Installation Requirements of the 2002 National Electrical Code


By Paul Rosenberg

John Wiley & Sons

ISBN: 0-7645-4278-8


Chapter One

General Requirements

General Requirements (Article 110)

The first requirement of the National Electrical Code is that all installations must be performed "in a neat and workmanlike manner." In other words, all electrical installation requirements presuppose an installer who is concerned, informed, and thinking. Without this prerequisite, any other requirements are almost worthless.

Basic Requirements (Article 110)

The following basic requirements apply to all electrical installations. They should be reviewed periodically by every electrical installer.

All unused openings in boxes, cabinets, etc. must be filled.

All equipment must be securely mounted. Wooden plugs in masonry are not allowed.

Panelboards and other exposed buswork must be protected from paint, plaster, or other similar materials during the construction process.

Conductors in manholes must be racked to provide a reasonable amount of access space.

Free circulation of air around electrical equipment, especially equipment that requires such air flow for sufficient heat removal, can't be obstructed.

All electrical connections must be made with devices that are listed and clearly marked as suitable for the intended use.

Conductors must be spliced with suitable splicing devices, or by soldering, brazing, orwelding. Soldered splices must first be joined, so that the splice is not dependent on the solder for mechanical or electrical strength. All splices must be covered with insulation equivalent to that of the conductors.

Wire connectors (lugs, wire nuts, etc.) must be rated no lower than the operating temperature of the conductors they are used with.

A reasonable amount of working space must be provided around all electrical equipment. Generally, the minimum is 3 feet. Table 110.26(A)(1) shows specific requirements.

Lighting, enough to work on the equipment, must be provided in the areas around electrical equipment.

Except for panels of 200 amps or less in dwelling units, there must be a minimum head space in front of electrical panels of 7 feet.

All live parts operating at over 50 volts must be guarded against accidental contact by persons or objects. See Section 110.31 for operation at over 600 volts. The primary methods of accomplishing this are as follows:

Locating the equipment in a room that is accessible only to qualified persons.

Installing permanent and effective partitions or screens.

Locating the equipment on a balcony or platform that will exclude unqualified persons.

Locating the equipment 8 feet or more from the floor.

Guards must be installed to protect electrical equipment from physical damage where necessary.

Entrances to rooms or areas where there are live parts must have a sign posted forbidding unqualified persons from entering.

All disconnecting means (service, feeder, or branch circuit) must be marked, showing the purpose. This is not required if the purpose of the disconnecting means is obvious.

Exposed parts of high- and medium-voltage systems must have adequate clearance above working spaces. Table 110.34(E) lists these distances.

Use of Grounded Conductors (Article 200)

All premises wiring systems must have a grounded conductor, except where the NEC specifically permits otherwise.

A grounded conductor must have insulation that is equal to that of any ungrounded conductors it is used with.

A grounded premises wiring system must receive its power from a grounded supply system.

A grounded conductor No. 6 or smaller must be covered with white or natural gray insulation (Figure 1.1), except:

1. Fixture wires.

2. Aerial cables can use a ridge on the grounded conductor, rather than a different color of insulation.

3. Where only qualified persons will have access to the conductors, colored conductors can be taped or painted white or gray at their terminations.

4. Grounded conductors in MI cables can be identified otherwise.

Grounded conductors No. 4 or larger can be identified either by having white or gray insulation, by having three longitudinal stripes 120 degrees apart, or by having a white marking at terminations.

If grounded conductors of different systems are installed in common boxes, raceways, etc., the first system must be marked as above, the second system's grounded conductor must be identified by having white insulation with a colored (but not green) tracer, and any other systems must have their own means of identification.

Cables to switches can use the grounded (white) conductor to bring power to the switch, but not from the switch (Figure 1.2).

Terminals used specifically for grounding conductors must be identified by a color sufficiently different from that used for other terminals.

For devices with screwshells, the grounded conductor must be connected to the screwshell, not to the tab, as shown in Figure 1.3.

(Continues...)



Excerpted from Audel Installation Requirements of the 2002 National Electrical Code by Paul Rosenberg Excerpted by permission.
All rights reserved. No part of this excerpt may be reproduced or reprinted without permission in writing from the publisher.
Excerpts are provided by Dial-A-Book Inc. solely for the personal use of visitors to this web site.

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