| |
| |
| Preface | |
| |
| |
| Acknowledgments | |
| |
| |
| General Sections | |
| |
| |
| |
| Introduction to the National Electrical Safety Code | |
| |
| |
| |
| Purpose | |
| |
| |
| |
| Scope | |
| |
| |
| |
| General Rules | |
| |
| |
| |
| Application | |
| |
| |
| |
| Waiver | |
| |
| |
| |
| Intent | |
| |
| |
| |
| Effective Date | |
| |
| |
| |
| Units of Measure | |
| |
| |
| |
| Method of Calculation | |
| |
| |
| |
| Definitions of Special Terms | |
| |
| |
| |
| References | |
| |
| |
| |
| Grounding Methods for Electric Supply and Communications Facilities | |
| |
| |
| |
| Purpose | |
| |
| |
| |
| Scope | |
| |
| |
| |
| Point of Connection of Grounding Conductor | |
| |
| |
| |
| Grounding Conductor and Means of Connection | |
| |
| |
| |
| Grounding Electrodes | |
| |
| |
| |
| Method of Connection to Electrode | |
| |
| |
| |
| Ground Resistance Requirements | |
| |
| |
| |
| Separation of Grounding Conductors | |
| |
| |
| |
| Number 098 Not Used in This Edition | |
| |
| |
| |
| Additional Requirements for Grounding and Bonding of Communication Apparatus | |
| |
| |
| |
| Rules for the Installation and Maintenance of Electric Supply Stations and Equipment | |
| |
| |
| |
| Purpose and Scope of Rules | |
| |
| |
| |
| Purpose | |
| |
| |
| |
| Scope | |
| |
| |
| |
| Application of Rules | |
| |
| |
| |
| Referenced Sections | |
| |
| |
| |
| Protective Arrangements in Electric Supply Stations | |
| |
| |
| |
| General Requirements | |
| |
| |
| |
| Illumination | |
| |
| |
| |
| Floors, Floor Openings, Passageways, and Stairs | |
| |
| |
| |
| Exits | |
| |
| |
| |
| Fire-Extinguishing Equipment | |
| |
| |
| |
| Installation and Maintenance of Equipment | |
| |
| |
| |
| General Requirements | |
| |
| |
| |
| Inspections | |
| |
| |
| |
| Guarding Shaft Ends, Pulleys, Belts, and Suddenly Moving Parts | |
| |
| |
| |
| Protective Grounding | |
| |
| |
| |
| Guarding Live Parts | |
| |
| |
| |
| Working Space About Electric Equipment | |
| |
| |
| |
| Equipment for Work on Energized Parts | |
| |
| |
| |
| Classified Locations | |
| |
| |
| |
| Identification | |
| |
| |
| |
| Mobile Hydrogen Equipment | |
| |
| |
| |
| Rotating Equipment | |
| |
| |
| |
| Speed Control and Stopping Devices | |
| |
| |
| |
| Motor Control | |
| |
| |
| |
| Number 132 Not Used in This Edition | |
| |
| |
| |
| Short-Circuit Protection | |
| |
| |
| |
| Storage Batteries | |
| |
| |
| |
| General | |
| |
| |
| |
| Location | |
| |
| |
| |
| Ventilation | |
| |
| |
| |
| Racks | |
| |
| |
| |
| Floors in Battery Areas | |
| |
| |
| |
| Illumination for Battery Areas | |
| |
| |
| |
| Service Facilities | |
| |
| |
| |
| Transformers and Regulators | |
| |
| |
| |
| Current-Transformer Secondary Circuits Protection When Exceding 600 V | |
| |
| |
| |
| Grounding Secondary Circuits of Instrument Transformers | |
| |
| |
| |
| Location and Arrangement of Power Transformers and Regulators | |
| |
| |
| |
| Short-Circuit Protection of Power Transformers | |
| |
| |
| |
| Conductors | |
| |
| |
| |
| Application | |
| |
| |
| |
| Electrical Protection | |
| |
| |
| |
| Mechanical Protection and Support | |
| |
| |
| |
| Isolation | |
| |
| |
| |
| Conductor Terminations | |
| |
| |
| |
| Circuit Breakers, Reclosers, Switches, and Fuses | |
| |
| |
| |
| Arrangement | |
| |
| |
| |
| Application | |
| |
| |
| |
| Circuit Breakers, Reclosers, and Switches Containing Oil | |
| |
| |
| |
| Switches and Disconnecting Devices | |
| |
| |
| |
| Disconnection of Fuses | |
| |
| |
| |
| Switchgear and Metal-Enclosed Bus | |
| |
| |
| |
| Switchgear Assemblies | |
| |
| |
| |
| Metal-Enclosed Bus | |
| |
| |
| |
| Surge Arresters | |
| |
| |
| |
| General Requirements | |
| |
| |
| |
| Indoor Locations | |
| |
| |
| |
| Grounding Conductors | |
| |
| |
| |
| Installation | |
| |
| |
| |
| Safety Rules for the Installation and Maintenance of Overhead Electric Supply and Communication Lines | |
| |
| |
| |
| Purpose, Scope, and Application of Rules | |
| |
| |
| |
| Purpose | |
| |
| |
| |
| Scope | |
| |
| |
| |
| Application of Rules | |
| |
| |
| |
| General Requirements | |
| |
| |
| |
| Referenced Sections | |
| |
| |
| |
| Number 211 Not Used in This Edition | |
| |
| |
| |
| Induced Voltages | |
| |
| |
| |
| Accessibility | |
| |
| |
| |
| Inspection and Tests of Lines and Equipment | |
| |
| |
| |
| Grounding of Circuits, Supporting Structures, and Equipment | |
| |
| |
| |
| Arrangement of Switches | |
| |
| |
| |
| General | |
| |
| |
| |
| Vegetation Management | |
| |
| |
| |
| Relations between Various Classes of Lines and Equipment | |
| |
| |
| |
| Relative Levels | |
| |
| |
| |
| Avoidance of Conflict | |
| |
| |
| |
| Joint Use of Structures | |
| |
| |
| |
| Communications Protective Requirements | |
| |
| |
| |
| Communication Circuits Located Within the Supply Space and Supply Circuits Located Within the Communication Space | |
| |
| |
| |
| Electric Railway Construction | |
| |
| |
| |
| Clearances | |
| |
| |
| |
| General | |
| |
| |
| |
| Clearances of Supporting Structures from Other Objects | |
| |
| |
| |
| Vertical Clearances of Wires, Conductors, Cables, and Equipment above Ground, Roadway, Rail, or Water Surfaces | |
| |
| |
| |
| Clearances between Wires, Conductors, and Cables Carried on Different Supporting Structures | |
| |
| |
| |
| Clearance of Wires, Conductors, Cables, and Equipment from Buildings, Bridges, Rail Cars, Swimming Pools, and Other Installations | |
| |
| |
| |
| Clearance for Wires, Conductors, or Cables Carried on the Same Supporting Structure | |
| |
| |
| |
| Climbing Space | |
| |
| |
| |
| Working Space | |
| |
| |
| |
| Vertical Clearance between Certain Communication and Supply Facilities Located on the Same Structure | |
| |
| |
| |
| Clearance of Vertical and Lateral Facilities from Other Facilities and Surfaces on the Same Supporting Structure | |
| |
| |
| |
| Grades of Construction | |
| |
| |
| |
| General | |
| |
| |
| |
| Application of Grades of Construction to Different Situations | |
| |
| |
| |
| Grades of Construction for Conductors | |
| |
| |
| |
| Grades of Construction for Line Supports | |
| |
| |
| |
| Loadings for Grades B and C | |
| |
| |
| |
| General Loading Requirements and Maps | |
| |
| |
| |
| Conductor Loading | |
| |
| |
| |
| Loads on Line Supports | |
| |
| |
| |
| Load Factors for Structures, Crossarms, Support Hardware, Guys, Foundations, and Anchors | |
| |
| |
| |
| Strength Requirements | |
| |
| |
| |
| General (see also Section 20) | |
| |
| |
| |
| Grades B and C Construction | |
| |
| |
| |
| Number 262 Not Used in This Edition | |
| |
| |
| |
| Grade N Construction | |
| |
| |
| |
| Guying and Bracing | |
| |
| |
| |
| Line Insulation | |
| |
| |
| |
| Application of Rule | |
| |
| |
| |
| Material and Marking | |
| |
| |
| |
| Ratio of Flashover to Puncture Voltage | |
| |
| |
| |
| Insulation Level | |
| |
| |
| |
| Factory Tests | |
| |
| |
| |
| Special Insulator Applications | |
| |
| |
| |
| Number 276 Not Used in This Edition | |
| |
| |
| |
| Mechanical Strength of Insulators | |
| |
| |
| |
| Aerial Cable Systems | |
| |
| |
| |
| Guy and Span Insulators | |
| |
| |
| |
| Section Number 28 Not Used in This Edition | |
| |
| |
| |
| Section Number 29 Not Used in This Edition | |
| |
| |
| |
| Safety Rules for the Installation and Maintenance of Underground Electric Supply and Communication Lines | |
| |
| |
| |
| Purpose, Scope, and Application of Rules | |
| |
| |
| |
| Purpose | |
| |
| |
| |
| Scope | |
| |
| |
| |
| Application of Rule | |
| |
| |
| |
| General Requirements Applying to Underground Lines | |
| |
| |
| |
| Referenced Sections | |
| |
| |
| |
| Installation and Maintenance | |
| |
| |
| |
| Accessibility | |
| |
| |
| |
| Inspection and Tests of Lines and Equipment | |
| |
| |
| |
| Grounding of Circuits and Equipment | |
| |
| |
| |
| Communications Protective Requirements | |
| |
| |
| |
| Induced Voltage | |
| |
| |
| |
| Underground Conduit Systems | |
| |
| |
| |
| Location | |
| |
| |
| |
| Excavation and Backfill | |
| |
| |
| |
| Ducts and Joints | |
| |
| |
| |
| Manholes, Handholes, and Vaults | |
| |
| |
| |
| Supply Cable | |
| |
| |
| |
| General | |
| |
| |
| |
| Sheaths and Jackets | |
| |
| |
| |
| Shielding | |
| |
| |
| |
| Cable Accessories and Joints | |
| |
| |
| |
| Cable in Underground Structures | |
| |
| |
| |
| General | |
| |
| |
| |
| Installation | |
| |
| |
| |
| Grounding and Bonding | |
| |
| |
| |
| Fireproofing | |
| |
| |
| |
| Communication Cables Containing Special Supply Circuits | |
| |
| |
| |
| Direct-Buried Cable | |
| |
| |
| |
| General | |
| |
| |
| |
| Location and Routing | |
| |
| |
| |
| Installation | |
| |
| |
| |
| Deliberate Separations-Equal to or Greater Than 300 mm (12 in) from Underground Structures or Other Cables | |
| |
| |
| |
| Random Separation-Separation Less Than 300 mm (12 in) from Underground Structures or Other Cables | |
| |
| |
| |
| Risers | |
| |
| |
| |
| General | |
| |
| |
| |
| Installation | |
| |
| |
| |
| Pole Risers-Additional Requirements | |
| |
| |
| |
| Pad-Mounted Installations | |
| |
| |
| |
| Supply Cable Terminations | |
| |
| |
| |
| General | |
| |
| |
| |
| Support at Terminations | |
| |
| |
| |
| Identification | |
| |
| |
| |
| Clearances in Enclosures or Vaults | |
| |
| |
| |
| Grounding | |
| |
| |
| |
| Equipment | |
| |
| |
| |
| General | |
| |
| |
| |
| Design | |
| |
| |
| |
| Location in Underground Structures | |
| |
| |
| |
| Installation | |
| |
| |
| |
| Grounding and Bonding | |
| |
| |
| |
| Identification | |
| |
| |
| |
| Installation in Tunnels | |
| |
| |
| |
| General | |
| |
| |
| |
| Environment | |
| |
| |
| |
| Rules for the Operation of Electric Supply and Communications Lines and Equipment | |
| |
| |
| |
| Purpose and Scope | |
| |
| |
| |
| Purpose | |
| |
| |
| |
| Scope | |
| |
| |
| |
| Referenced Sections | |
| |
| |
| |
| Supply and Communication Systems-Rules for Employers | |
| |
| |
| |
| General Requirements | |
| |
| |
| |
| Protective Methods and Devices | |
| |
| |
| |
| General Rules for Employees | |
| |
| |
| |
| Personal General Precautions | |
| |
| |
| |
| General Operating Routines | |
| |
| |
| |
| Overhead Line Operating Procedures | |
| |
| |
| |
| Underground Line Operating Procedures | |
| |
| |
| |
| Additional Rules for Communications Employees | |
| |
| |
| |
| General | |
| |
| |
| |
| Approach to Energized Conductors or Parts | |
| |
| |
| |
| Joint-Use Structures | |
| |
| |
| |
| Attendant on Surface at Joint-Use Manhole | |
| |
| |
| |
| Sheath Continuity | |
| |
| |
| |
| Additional Rules for Supply Employees | |
| |
| |
| |
| General | |
| |
| |
| |
| Energized Conductors or Parts | |
| |
| |
| |
| Switching Control Procedures | |
| |
| |
| |
| Work on Energized Lines and Equipment | |
| |
| |
| |
| De-energizing Equipment or Lines to Protect Employees | |
| |
| |
| |
| Protective Grounds | |
| |
| |
| |
| Live Work | |
| |
| |
| |
| Protection against Arcing and Other Damage While Installing and Maintaining Insulators and Conductors | |
| |
| |
| |
| Photographs of NESC Applications | |
| |
| |
| |
| OSHA Standards Related to the NESC Work Rules | |
| |
| |
| Index | |