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Code Enforcement Officials


This web page offers Building Code Officials, Electrical Inspectors, and others the capability to view NEMA standards, guides, white papers, and Engineering Bulletins covering NEMA products ranging from Adjustable Speed Drive Systems to recommendations for Handling Water-Damaged Electrical Equipment. All of these documents are available for free download for printing or for saving as a file for future use. The web page also provides several useful links to:

  • NEMA standards that are available for purchase,
  • NEMA’s Field Representative Program, and
  • websites for other organizations that may be of interest.

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NEMA Materials

  • NEMA Standards and White Papers free for download
  • Limited-Service Controllers- by NEMA Members
  • Electrical Standards & Product Guide 2006
  • Guidelines for Handling Water-Damaged Electrical Equipment

Other Resources

NEMA Field Representatives serve NEMA members by promoting the use and adoption of the National Electrical Code® (NEC®) and by monitoring regional developments of importance to the electroindustry.

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Arc Flash

Standards

Guides and White Papers
​Arc-Flash Analysis—Utility System Parameters Critical for Accurate PPE
​Avoid Arc Flash Occurrences by Following Industry Standards

Automation and Motor Control

Standards ​Guides and White Papers
Adjustable Speed Electrical Power Drive Systems, Part 1: General Requirements—Rating Specifications for Low Voltage Adjustable Speed D.C. Power Drive Systems
​Application Guide for AC Adjustable Speed Drive Systems

Electrical Installation

Standards Guides and White Papers
​Engineering Series Ratings: Is It Practical?
Evaluating Water-Damaged Electrical Equipment
​Multiple Knockouts
​Knockout Diameters and Fitting Dimensions to Assure Mechanical and Electrical Continuity
​Hazards of Working Electrical Equipment Hot
​Electrical Installation Requirements: A Global Perspective
​A Brief Comparison of NEMA 250 and IEC 60529

Enclosures

Standards Guides and White Papers
​NEMA Enclosure Types
​A Brief Comparison of NEMA 250 and IEC 60529

Exit Signs

Standards Guides and White Papers
​Exit Sign Brightness for Visibility & Safety

Industrial Control and Systems

Standards Guides and White Papers
​Industrial Control and Systems: General Requirements
​Industrial Control and Systems: Safety Guidelines for the Application, Installation, and Maintenance of Solid State Controls
​Industrial Control and Systems: Preventive Maintenance of Industrial Control and Systems Equipment
​Industrial Control and Systems Part 1: Electromechanical AC Transfer Switch Equipment
​Industrial Control and Systems: AC Transfer Equipment — Part 2: Static AC Transfer Equipment
​Industrial Control and Systems: Profiles of Networked Industrial Devices—Part 1: General Rules
​Industrial Control and Systems: Application Guide for Electric Fire Pump Controllers
​Industrial Control and Systems: Instructions for the Handling, Installation, Operation, and Maintenance of Electric Fire Pump Controllers Rated Not More than 600V
​Industrial Control and Systems: Motion/Position Control Motors, Controls, and Feedback Devices
​Industrial Control and Systems: Motor Control Centers
​Industrial Control and Systems: Diagrams, Device Designations, and Symbols
​AC Vaccum-Break Magnetic Controllers Rated 1500 Volts AC
​Industrial Control and Systems: Controllers, Contactors, and Overload Relays, Rated Not More Than 2000 Volts AC or 750 Volts DC: Part 8 - Disconnect Devices for Use in Industrial Control Equipment
​Industrial Control and Systems: Controllers, Contactors, and Overload Relays Rated 600 Volts
​Industrial Control and Systems: Instructions for the Handling, Installation, Operation, and Maintenance of Motor Control Centers Rated Not More than 600 Volts
​NEMA and IEC Devices for Motor Service—A Guide for Understanding the Differences
​Industrial Control and Systems: Medium Voltage Controllers Rated 2001 to 7200 Volts AC
​Industrial Control and Systems: Handling, Storage, and Installation Guide for AC General-Purpose Medium Voltage Contactors and Class E Controllers, 50 and 60 Hertz
​Industrial Control and Systems: Terminal Blocks
​Industrial Control and Systems: Typical Proximity Switch Specifications
​Industrial Control and Systems: Additional Requirements for Proximity Switches Suitable for Use in Strong Magnetic Fields
​Industrial Control and Systems: High Pressure Power Wash Test Procedure for Self-Contained Control-Circuit Devices
​Application Information for Limit Switches
​Industrial Control and Systems: Control Circuit and Pilot Devices
​Industrial Control and Systems: Enclosures
​Adjustable Speed Electrical Power Drive Systems, Part 2: General Requirements--Rating Specifications for Low Voltage Adjustable Frequency A.C. Power Drive Systems
​Adjustable Speed Electrical Power Drive Systems: Part 4: General Requirements--Rating Specifications for A.C. Power Drive Systems Above 1000 V A.C. and not Exceeding 35 kV
​Industrial Control and Systems: Adjustable-Speed Drives
​Safety Standards for Construction and Guide for Selection, Installation, and Operation of Adjustable-Speed Drive Systems

Lamps and Lighting Systems

​Standards Guides and White Papers
​NEMA - Tungsten-Halogen Lamps (Bulbs): Ultraviolet, Rupture, and High Temperature Risks ​White Paper on Outdoor Lighting Issues
​Wiring Requirements for T-8 Lamps with Instant-Start Ballasts ​Green Marking of Lamps
NEMA - Wiring Requirements for 2G11 Based T-5 Fluorescent Twin Lamps With Instant-Start Ballasts​ ​Recommendations for the Care and Maintenance of High Intensity Metal Halide and Mercury Lighting in Schools
Interaction of Infrared Controls and Electronic Compact Fluorescent Lamps​ ​NEMA Guide to Lighting Controls
Glossary of Terms Pertaining To Remote Illumination Systems​ ​The Labeling of Mercury Containing Lamps
34 Watt Fluorescent Lamps And High Frequency Electronic Ballasts​ ​Fluorescent Lamps and the Environment
Interaction of Infrared Controls and Fluorescent Lamp/Ballast Systems in Education Facilities​ ​Impact of Mercury Legislation on the Lighting Industry
Ultraviolet Radiation From Fluorescent Lamps​ ​Manufacturer Take Back of Lamps
​Compact Fluorescent Lamps In Residences – Power Quality Implications ​Pin Based Compact Fluorescent Lamps
Compatibility of Add-on Tube Guards with T-8 Fluorescent Lamps Operating on High Frequency Electronic Ballasts​ ​Alternatives to Mercury-Containing Light Solutions
​A Guide for the Safe Use of Remote Illumination Systems Equipment, Including a Glossary of Definitions ​Electronic Ballast / Lighting Controls Compatibility Concerns Associated with Inrush Currents
Guidelines on the Application of Dimming to High Intensity Discharge Lamps​
​Radioactive Substances In Compact Fluorescent Lamps
​Consumer Guide for Four-Foot Fluorescent Bulbs
​Compatibility of Fluorescent Lamps and Electronic Ballasts in Frequently Switched Applications

Low Voltage Distribution Equipment

Standards Guides and White Papers
​General Instructions for Proper Handling, Installation, Operation, and Maintenance of Busway Rated 600 Volts or Less ​Molded-Case Circuit Breakers Reduce Arc Flash Hazard Impact
​Instrucciones Generales Para el Manejo, Instalacion, Operacion y Mantenimiento de Electroductos Hasta 600 Volts Nominales o Menos
​Application Information for Busway Rated 600 Volts or Less
​Panelboards
​General Instructions for Proper Installation, Operation, and Maintenance of Panelboards Rated 600 Volts or Less
​Instrucciones Generales Para la Instalacion, Operacion y El Mantenimiento Correcto de Tableros de Alumbrado y Control Hasta 600 Volts Nominales o Menos
​Enclosed and Miscellaneous Distribution Equipment Switches (600 Volts Maximum)
​Molded Case Circuit Breakers and their Application
​Guidelines for Inspection and Preventive Maintenance of Molded Case Circuit Breakers Used in Commercial and Industrial Applications

Miscellaneous

Standards Guides and White Papers
​Safety Guide for Use of Extension Cords
​User Input to NEMA Standards (Guidelines for NEMA Subdivisions)
​Guidelines for Metric Conversion of NEMA Standards
​FCC Regulations Applicable to NEMA Products
​Phantom Voltages
​NEMA Policy on Adoption of the National Electrical Code
​Knockout Diameters and Fitting Dimensions to Assure Mechanical and Electrical Continuity
​The Strengths of an Effective Electrical Safety System
​NEMA Analysis of the Energy Policy Act of 1992: The Scope of Electric Motors Subject to Efficiency Standards on October 24, 1997
​Guide to Preparing a Design Proposal for Paralleling Customer Generation with an Electric Utility

Motors

Standards Guides and White Papers
​Information Guide for General Purpose Industrial AC Small and Medium Squirrel-Cage Induction Motor Standards ​Type 2 Motor Starter Protection Guide
​Energy Management Guide for Selection and Use of Fixed Frequency Medium AC Squirrel-Cage Polyphase Induction Motors
​Energy Management Guide for Selection and Use of Single Phase Motors

Residential Controls

Standards Guides and White Papers
​Residential Controls—Class 2 Transformers
​Residential Controls—Electrical Wall-Mounted Room Thermostats
​Residential Controls—Surface-Type Controls for Electric Storage Water Heaters
​Residential Controls—Temperature Limit Controls for Electric Baseboard Heaters
​Residential Controls: Hot Water Immersion Controls
​Residential Controls: Line Voltage Integrally Mounted Thermostats for Electric Heaters

Smoke Alarms, CO Detectors

Standards Guides and White Papers
​Fire and Carbon Monoxide Safety Recommendations
​Guide for Proper Use of System Smoke Detectors
​NEMA Position on Compatibility between Smoke Alarms and AFCIs
​Quality Informational Guide for Automatic Fire Detection and Alarm Systems

Wiring Systems

​Selection and Installation Guidelines for Fittings for Use with Non-flexible Electrical Metal Conduit or Tubing (Rigid Metal Conduit, Intermediate Metal Conduit, and Electrical Metallic Tubing) ​Cable Tray Span Specification
Selection and Installation Guidelines For Fittings for Use With Flexible Electrical Conduit and Cable ​ ​Use of Anti-Short Bushings for Terminating Type MC Cables
​Selection and Installation Guidelines for Electrical Outlet Boxes ​NEMA Termination of Bonding Strip on Type AC Cable
Application and Installation Guidelines for Armored Cable and Metal-Clad Cable ​ Use of Type NM-B Cable for Wiring of Residential Lighting Fixtures ​
Application and Installation Guidelines for Nonmetallic-Sheathed Cables ​ ​Length Limitations for FMC and LFMC.
Application and Installation Guidelines for Flexible and Liquidtight Flexible Metal Conduit ​ ​Expansion Joints for PVC Rigid Nonmetallic Conduit
Fiberglass Cable Tray Systems ​ ​User Guide to Product Specifications for Electrical Building Wire and Cable
​Metal Cable Tray Installation Guidelines ​User Guide to Product Specifications for Metal Electrical Conduit and Tubing
​Conduit-in-Casing Construction
​Solvent-Cementing Joints for PVC Rigid Nonmetallic Conduit, Duct, and Fittings