Table of Contents - NEC.CODE

1 Mike Holt Enterprises, Inc. ( )vTable of ContentsIntroduction ..viiiAbout This Textbook ..xHow to Use the National Electrical Code ..xiiAbout the Author ..xvAbout the Graphic Illustrator ..xviMike Holt Enterprises Team ..xviiARTICLE 90 INTRODUCTION TO THE NATIONAL ELECTRICAL CODE .. Purpose of the NEC .. Scope of the NEC .. Code .. Enforcement .. Mandatory Requirements and Explanatory Material .. Formal Interpretations .. Examination of Equipment for Product Safety .. Units of Measurement .. 8 Practice Questions for Article 90 Introduction to the National Electrical Code.

2 9 ARTICLE 300 WIRING METHODS ..13 Part I. General .. Protection Against Physical Damage .. Securing and Supporting.. Raceway Sizing .. Spread of Fire or Products of Combustion .. Wiring in Ducts Not for Air Handling, Fabricated Ducts for Environmental Air, and Other Spaces for Environmental Air (Plenums) ..17 Practice Questions for Article 300 Wiring Methods ..21 ARTICLE 725 REMOTE-CONTROL, SIGNALING, AND POWER-LIMITED I. General .. Scope .. Definitions .. Other Articles .. Electrical Equipment Behind Access Panels .. Mechanical Execution of Work.

3 Abandoned Cable .. Safety-Control Equipment .. Circuit Requirements ..28 Part II. Class 1 Circuit Requirements .. Class 1 Circuit Classifications and Power-Supply Requirements .. Class 1 Circuit Overcurrent Protection .. Class 1 Circuit Wiring Methods .. Conductors of Different Circuits in Same Cable, Cable Tray, Enclosure, or Raceway .. Class 1 Circuit Conductors .. Number of Conductors in a Raceway ..30 Part III. Class 2 and Class 3 Circuit Requirements .. Power Sources for Class 2 and Class 3 Circuits .. Equipment Wiring Methods on Supply Side of the Class 2 or Class 3 Power Source.

4 Wiring Methods on Load Side of the Class 2 or Class 3 Power Source .. Separation from Power Conductors .. Conductors of Different Circuits in Same Cable, Enclosure, Cable Tray, or Raceway .. Applications of Class 2 and Class 3 Cables ..34 Part VI. Listing Requirements .. Listing and Marking Requirements of Class 2 and Class 3 Cables and Raceways ..36 Practice Questions for Article 725 Remote Control, Signaling, and Power-Limited Circuits ..38 ARTICLE 760 FIRE ALARM SYSTEMS ..41 Part I. General .. Scope .. Definitions .. Other Articles.

5 Access to Electrical Equipment Behind Panels Designed to Allow Access .. Mechanical Execution of Work .. Abandoned Cable .. Fire Alarm Circuit Identification ..45 Table of ContentsviUnderstanding 2011 NEC Requirements for Limited Energy and Communications SystemsARTICLE 800 COMMUNICATIONS I. General .. Scope .. Definitions .. Installation of Equipment .. Access to Electrical Equipment Behind Panels Designed to Allow Access .. Mechanical Execution of Work .. Abandoned Cable .. Spread of Fire or Products of Combustion ..70 Part II.

6 Cables Outside and Entering Buildings .. Overhead (Aerial) Communications Cables .. Underground Communications Wires and Cables Entering Buildings .. Unlisted Cables Entering Buildings .. Lightning Conductors ..72 Part III. Protection .. Primary Protection .. Grounding or Interruption of Metallic Sheath Members of Communications Cables .. 72 Part IV. Grounding Methods .. Cable and Primary Protector Bonding and Grounding ..72 Part V. Installation Methods Within Buildings .. Raceways for Communications Wires and Cables .. Installation of Communications Cables and Communications Raceways.

7 Installation of Communications Cables .. Applications of Communications Cables and Communications Raceways .. Dwelling Unit Communications Outlet ..79 Part VI. Listing Requirements .. Listing and Marking of Communications Cables .. 79 Practice Questions for Article 800 Communications Circuits .. Fire Alarm Circuit Cables Extending Beyond a Building .. Fire Alarm Circuit Requirements ..45 Part III. Power-Limited Fire Alarm (PLFA) Circuits .. Power Sources for Power-Limited Fire Alarm Circuits .. Equipment Wiring Methods on Load Side of Power-Limited Fire Alarm Power Source.

8 Separation from Power Conductors .. Power-Limited Fire Alarm Circuits, Class 2, Class 3, and Communications Circuits .. Applications of Power-Limited Fire Alarm Cables (PLFA) ..48 Part IV. Listing Requirements .. Listing and Marking Requirements of Power-Limited Fire Alarm Cables (PLFA) ..49 Practice Questions for Article 760 Fire Alarm Systems ..51 ARTICLE 770 OPTICAL FIBER CABLES AND RACEWAYS ..55 Part I. General .. Scope .. Definitions .. Other Articles .. Innerduct .. Access to Electrical Equipment Behind Panels Designed to Allow Access.

9 Mechanical Execution of Work .. Abandoned Cable .. Spread of Fire or Products of Combustion ..58 Part II. Cables Outside and Entering Buildings .. Unlisted Cables Entering Buildings ..59 Part V. Installation Methods Within Buildings .. Raceways for Optical Fiber Cables .. Installation of Optical Fiber Cables, Optical Fiber Raceways, and Cable Routing Assemblies .. Installation of Optical Fiber Cables .. Applications of Optical Fiber Cables and Raceways .. Listing and Marking of Optical Fiber Questions for Article 770 Optical Fiber Cables and Raceways.

10 63 Table of ContentsMike Holt Enterprises, Inc. ( )viiTable of ContentsARTICLE 820 COMMUNITY ANTENNA TELEVISION (CATV) AND radio DISTRIBUTION SYSTEMS ..93 Part I. General .. Scope .. Definitions .. Locations and Other Articles .. Power Limitations .. Access to Electrical Equipment Behind Panels Designed to Allow Access .. Mechanical Execution of Work .. Abandoned Cable .. Spread of Fire or Products of Combustion ..97 Part II. Coaxial Cables Outside and Entering Buildings .. Unlisted Cables and Raceways Entering Building .. 97 Part III.