• NFPA 77 : 2014

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

    STATIC ELECTRICITY

    Available format(s):  Hardcopy

    Superseded date:  17-11-2018

    Language(s):  English

    Published date:  01-01-2014

    Publisher:  National Fire Protection Association

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    Table of Contents - (Show below) - (Hide below)

    Chapter 1 - Administration
    Chapter 2 - Referenced Publications
    Chapter 3 - Definitions
    Chapter 4 - Units and Symbols of Measure
    Chapter 5 - Fundamentals of Static Electricity
    Chapter 6 - Evaluating Static Electricity Hazards
    Chapter 7 - Control of Static Electricity and Its Hazards by
                 Process Modification and Grounding
    Chapter 8 - Control of Static Electricity and Its Hazards by
                 Static Eliminators and Personnel Factors
    Chapter 9 - Flammable and Combustible Liquids and Their Vapors
    Chapter 10 - Fluid Flow in Piping, Hose, Tubing, and Filters
    Chapter 11 - Static Electricity Hazards of Liquids in Containers
                 and Intermediate Bulk Containers
    Chapter 12 - Static Electricity Hazards of Liquids in Bulk Storage
                 Tanks and in Tank Vehicles
    Chapter 13 - Static Electricity Hazards in Process Vessels
    Chapter 14 - Static Electricity Hazards of Operations in Process
                 Vessels and Tanks
    Chapter 15 - Powders and Dusts
    Chapter 16 - Intermediate Bulk Containers (IBCs) for Powders
    Chapter 17 - Web and Sheet Processes
    Chapter 18 - Miscellaneous Applications
    Annex A - Explanatory Material
    Annex B - Physical Characteristics of Materials
    Annex C - Additional Information on Flash Point
    Annex D - Additional Information on Vapor Pressure
    Annex E - Additional Information on Charge Relaxation
    Annex F - Additional Information on Conductivity
    Annex G - Recommended Means for Providing Bonding and Grounding
    Annex H - Glossary of Terms
    Annex I - Informational References

    Abstract - (Show below) - (Hide below)

    Covers the identification, assessment, and control of static electricity for purposes of preventing fires and explosions.

    General Product Information - (Show below) - (Hide below)

    Development Note 2007 version is also available in Spanish; See NFPA 77 SPANISH. (06/2010) Availability Date: 22/06/2018. (05/2018)
    Document Type Standard
    Publisher National Fire Protection Association
    Status Superseded
    Superseded By
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    NFPA 560 : 2007 STORAGE, HANDLING, AND USE OF ETHYLENE OXIDE FOR STERILIZATION AND FUMIGATION
    NFPA 61 : 2017 PREVENTION OF FIRES AND DUST EXPLOSIONS IN AGRICULTURAL AND FOOD PROCESSING FACILITIES
    BS ISO 16924 : 2016 NATURAL GAS FUELLING STATIONS - LNG STATIONS FOR FUELLING VEHICLES
    NFPA 32 : 2016 DRYCLEANING FACILITIES
    AAMI TIR15 : 2016 PHYSICAL ASPECTS OF ETHYLENE OXIDE STERILIZATION
    API 1631 : 2001 INTERIOR LINING AND PERIODIC INSPECTION OF UNDERGROUND STORAGE TANKS
    AIHA Z9.6 : 2008 EXHAUST SYSTEMS FOR GRINDING, POLISHING, AND BUFFING
    API RP 2219 : 2016 SAFE OPERATION OF VACUUM TRUCKS HANDLING FLAMMABLE AND COMBUSTIBLE LIQUIDS IN PETROLEUM SERVICE
    Z276-18 Liquefied natural gas (LNG) - Production, storage, and handling
    NFPA 61B : 1989 PREVENTION OF FIRES AND EXPLOSIONS IN GRAIN ELEVATORS AND FACILITIES HANDLING BULK RAW AGRICULTURAL COMMODITIES
    PD CLC/TR 60079-32-1:2015 EXPLOSIVE ATMOSPHERES - PART 32-1: ELECTROSTATIC HAZARDS - GUIDANCE
    API 14FZ : 2013 RECOMMENDED PRACTICE FOR DESIGN, INSTALLATION, AND MAINTENANCE OF ELECTRICAL SYSTEMS FOR FIXED AND FLOATING OFFSHORE PETROLEUM FACILITIES FOR UNCLASSIFIED AND CLASS 1, ZONE 0, ZONE 1, AND ZONE 2 LOCATIONS
    NFPA 30 HDBK : 2018 FLAMMABLE AND COMBUSTIBLE LIQUIDS CODE HANDBOOK
    NFPA 12A : 2018 HALON 1301 FIRE EXTINGUISHING SYSTEMS
    NFPA 30 : 2018 FLAMMABLE AND COMBUSTIBLE LIQUIDS CODE
    NFPA 30A : 2018 MOTOR FUEL DISPENSING FACILITIES AND REPAIR GARAGES
    NFPA 99 HDBK : 2018 HEALTH CARE FACILITIES CODE HANDBOOK
    NFPA 10 : 2018 PORTABLE FIRE EXTINGUISHERS
    NFPA 33 : 2018 SPRAY APPLICATION USING FLAMMABLE OR COMBUSTIBLE MATERIALS
    NFPA 122 : 2015 FIRE PREVENTION AND CONTROL IN METAL/NONMETAL MINING AND METAL MINERAL PROCESSING FACILITIES
    NFPA 407 : 2017 AIRCRAFT FUEL SERVICING
    NFPA 51A : 2012 ACETYLENE CYLINDER CHARGING PLANTS
    NFPA 35 : 2016 MANUFACTURE OF ORGANIC COATINGS
    NFPA 79 : 2018 ELECTRICAL STANDARD FOR INDUSTRIAL MACHINERY
    NFPA 99 : 2018 HEALTH CARE FACILITIES CODE
    NFPA 34 : 2018 DIPPING, COATING, AND PRINTING PROCESSES USING FLAMMABLE OR COMBUSTIBLE LIQUIDS
    NFPA 400 : 2016 HAZARDOUS MATERIALS CODE
    NFPA 850 : 2015 FIRE PROTECTION FOR ELECTRIC GENERATING PLANTS AND HIGH VOLTAGE DIRECT CURRENT CONVERTER STATIONS
    NFPA 2001 : 2018 CLEAN AGENT FIRE EXTINGUISHING SYSTEMS
    NFPA 59 : 2018 UTILITY LP-GAS PLANT CODE
    NFPA 650 : 1998 PNEUMATIC CONVEYING SYSTEMS FOR HANDLING COMBUSTIBLE PARTICULATE SOLIDS
    PIP ELCGL01 : 2013 ELECTRICAL DESIGN CRITERIA
    ASHRAE HDBK HVAC APPLICATIONS : 2015 ASHRAE HANDBOOK - HVAC APPLICATIONS
    MIL-PRF-32335 Base Document:2010 TRICON REFRIGERATED CONTAINER SYSTEM (TRCS)
    NFPA 481 : 2000 PRODUCTION, PROCESSING, HANDLING, AND STORAGE OF TITANIUM
    NFPA 56 : 2017 FIRE AND EXPLOSION PREVENTION DURING CLEANING AND PURGING OF FLAMMABLE GAS PIPING SYSTEMS
    NFPA 85A : 1987 PREVENTION OF FURNACE EXPLOSIONS IN FUEL OIL AND NATURAL GAS FIRED SINGLE BURNER BOILER FURNACES
    NSS 1740.12 : 0 SAFETY STANDARD FOR EXPLOSIVES, PROPELLANTS, AND PYROTECHNICS
    NFPA 329 : 2015 HANDLING RELEASES OF FLAMMABLE AND COMBUSTIBLE LIQUIDS AND GASES
    ISO 16924:2016 Natural gas fuelling stations — LNG stations for fuelling vehicles
    NFPA 85 : 2015 BOILER AND COMBUSTION SYSTEMS HAZARDS CODE
    S.R. CLC/TR 60079-32-1:2015 EXPLOSIVE ATMOSPHERES - PART 32-1: ELECTROSTATIC HAZARDS - GUIDANCE
    NFPA 56 (PS) : 2012 FIRE AND EXPLOSION PREVENTION DURING CLEANING AND PURGING OF FLAMMABLE GAS PIPING SYSTEMS
    NFPA 30B : 2015 CODE FOR THE MANUFACTURE AND STORAGE OF AEROSOL PRODUCTS
    NFPA 651 : 1998 MACHINING AND FINISHING OF ALUMINUM AND THE PRODUCTION AND HANDLING ALUMINUM POWDERS
    NFPA 12 : 2018 CARBON DIOXIDE EXTINGUISHING SYSTEMS
    API STD 2015 : 2018 REQUIREMENTS FOR SAFE ENTRY AND CLEANING OF PETROLEUM STORAGE TANKS
    API RP 2023 : 2001( R2006) GUIDE FOR SAFE STORAGE AND HANDLING OF HEATED PETROLEUM-DERIVED ASPHALT PRODUCTS AND CRUDE-OIL RESIDUA
    NFPA HAZARDOUS MATERIALS RESPONSE HDBK : 2013 HAZARDOUS MATERIALS/WEAPONS OF MASS DESTRUCTION RESPONSE HANDBOOK
    NFPA 664 : 2017 PREVENTION OF FIRES AND EXPLOSIONS IN WOOD PROCESSING AND WOODWORKING FACILITIES
    NFPA 49 : 1994 HAZARDOUS CHEMICALS DATA
    C22.1-15 PACKAGE Consists of C22.1-15, Canadian electrical code, part I (23rd edition), safety standard for electrical installations; C22.1HB-15, Canadian electrical code handbook - an explanation of rules of the Canadian electrical code, part I and the 2015 Electrical quick reference
    BS EN ISO 16924:2018 Natural gas fuelling stations. LNG stations for fuelling vehicles
    ASTM E 1344 : 1990 : R1997 : EDT 1 Standard Guide for Evaluation of Fuel Ethanol Manufacturing Facilities
    ASTM E 1344 : 1990 : R2006 Standard Guide for Evaluation of Fuel Ethanol Manufacturing Facilities (Withdrawn 2009)
    ASTM D 7901 : 2014 : REV A Standard Specification for Dimethyl Ether for Fuel Purposes
    NFPA 59A : 2016 PRODUCTION, STORAGE, AND HANDLING OF LIQUEFIED NATURAL GAS (LNG)
    NFPA 2 : 2016 HYDROGEN TECHNOLOGIES CODE
    NFPA 52 : 2016 VEHICULAR NATURAL GAS FUEL SYSTEMS CODE
    NFPA 120 : 2015 FIRE PREVENTION AND CONTROL IN COAL MINES
    NFPA 58 : 2017 LIQUEFIED PETROLEUM GAS CODE
    NFPA 91 : 2015 EXHAUST SYSTEMS FOR AIR CONVEYING OF VAPORS, GASES, MISTS, AND PARTICULATE SOLIDS
    NFPA 820 : 2016 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIES
    NASA-STD-8719.11B:2020 STANDARD FOR FIRE PROTECTION AND LIFE SAFETY
    NFPA 45 HDBK : 2015 FIRE PROTECTION FOR LABORATORIES USING CHEMICALS HANDBOOK
    Z462-18 Workplace electrical safety
    NFPA 1 : 2021 FIRE CODE
    C22.1HB-18 Canadian Electrical Code Handbook - An Explanation of the Rules of the Canadian Electrical Code, Part I
    NFPA 79 HDBK : 2015 Electrical Standard for Industrial Machinery Handbook
    UFC 3-460-01 : Change 3 UNIFIED FACILITIES CRITERIA - DESIGN: PETROLEUM FUEL FACILITIES
    UFC 3-575-01 : 2012 UNIFIED FACILITIES CRITERIA - LIGHTNING AND STATIC ELECTRICITY PROTECTION SYSTEMS
    EEE 602 : 2007 ELECTRIC SYSTEMS IN HEALTH CARE FACILITIES
    NFPA 326 : 2015 SAFEGUARDING OF TANKS AND CONTAINERS FOR ENTRY, CLEANING, OR REPAIR
    API 2023:2001 GUIDE FOR SAFE STORAGE AND HANDLING OF HEATED PETROLEUM-DERIVED ASPHALT PRODUCTS AND CRUDE-OIL RESIDUA
    MIL-E-87235 Base Document:1985 EMERGENCY ESCAPE, AIRCRAFT (REQUEST FOR ISSUE MUST BE SENT VIA ASD/ENES, WRIGHT-PATTERSON AFB OH 45433-6503
    NFPA 654 : 2017 PREVENTION OF FIRE AND DUST EXPLOSIONS FROM THE MANUFACTURING, PROCESSING, AND HANDLING OF COMBUSTIBLE PARTICULATE SOLIDS
    NFPA 306 : 2014 CONTROL OF GAS HAZARDS ON VESSELS
    NFPA 495 : 2018 EXPLOSIVE MATERIALS CODE
    13/30271407 DC : DRAFT DEC 2013 BS ISO 16924 - NATURAL GAS FUELLING STATIONS - LNG STATIONS FOR FUELLING VEHICLES
    MIL-STD-3004 Revision D:2014 QUALITY ASSURANCE/SURVEILLANCE FOR FUELS, LUBRICANTS AND RELATED PRODUCTS
    BS ISO 12648:2006 Graphic technology. Safety requirements for printing press systems
    04/30110212 DC : DRAFT MAR 2004 ISO 12648 - GRAPHIC TECHNOLOGY - SAFETY REQUIREMENTS FOR PRINTING PRESS SYSTEMS
    NFPA 385 : 2017 TANK VEHICLES FOR FLAMMABLE AND COMBUSTIBLE LIQUIDS
    NFPA 36 : 2017 SOLVENT EXTRACTION PLANTS
    API 74 : 2001 : R2007 RECOMMENDED PRACTICE FOR OCCUPATIONAL SAFETY FOR ONSHORE OIL AND GAS PRODUCTION OPERATION
    API 2021 : 2001 : R2006 MANAGEMENT OF ATMOSPHERIC STORAGE TANK FIRES
    NFPA 85D : 1989 PREVENTION OF FURNACE EXPLOSIONS IN FUEL OIL FIRED MULTIPLE BURNER BOILER FURNACES
    NFPA 8501 : 1997 SINGLE BURNER BOILER OPERATION
    API 2021A : 1998 INTERIM STUDY - PREVENTION AND SUPPRESSION OF FIRES IN LARGE ABOVEGROUND ATMOSPHERIC STORAGE TANKS
    AIHA Z9.6 : 2008 EXHAUST SYSTEMS FOR GRINDING, POLISHING, AND BUFFING
    NFPA 12B : 1990 HALON 1211 FIRE EXTINGUISHING SYSTEMS
    NFPA 921 : 2017 GUIDE FOR FIRE AND EXPLOSION INVESTIGATIONS
    ASTM D 7901 : 2014 Standard Specification for Dimethyl Ether for Fuel Purposes
    API 2610 : 2005 : R2010 DESIGN, CONSTRUCTION, OPERATION, MAINTENANCE, AND INSPECTION OF TERMINAL AND TANK FACILITIES
    API 14F : 2008 : R2013 DESIGN, INSTALLATION, AND MAINTENANCE OF ELECTRICAL SYSTEMS FOR FIXED AND FLOATING OFFSHORE PETROLEUM FACILITIES FOR UNCLASSIFIED AND CLASS 1, DIVISION 1 AND DIVISION 2 LOCATIONS
    API 540 : 1999 : R2006 ELECTRICAL INSTALLATIONS IN PETROLEUM PROCESSING PLANTS
    NFPA 70 : 2017 NATIONAL ELECTRICAL CODE
    NFPA 58 HDBK : 2017 LP-GAS CODE HANDBOOK
    API 1626 REDLINE : 2010 STORING AND HANDLING ETHANOL AND GASOLINE-ETHANOL BLENDS AT DISTRIBUTION TERMINALS AND FILLING STATIONS
    ISO 12643-1:2009 Graphic technology Safety requirements for graphic technology equipment and systems Part 1: General requirements
    NFPA 55 : 2016 COMPRESSED GASES AND CRYOGENIC FLUIDS CODE
    NFPA 61 : 2020 PREVENTION OF FIRES AND DUST EXPLOSIONS IN AGRICULTURAL AND FOOD PROCESSING FACILITIES
    NASA KSC STD E 0012 : 2013 FACILITY GROUNDING AND LIGHTNING PROTECTION, STANDARD FOR
    NASA KSC STD E 0022 : 2013 BONDING, GROUNDING, SHIELDING, ELECTROMAGNETIC INTERFERENCE, LIGHTNING AND TRANSIENT PROTECTION, DESIGN REQUIREMENTS FOR GROUND SYSTEMS
    NASA STD 8719.24 : 2011 NASA EXPENDABLE LAUNCH VEHICLE PAYLOAD SAFETY REQUIREMENTS
    NASA STD 8719.12 : 2010 SAFETY STANDARD FOR EXPLOSIVES, PROPELLANTS, AND PYROTECHNICS
    NASA MSFC STD 1800 : 2008 ELECTROSTATIC DISCHARGE (ESD) CONTROL FOR PROPELLANT AND EXPLOSIVE DEVICES
    CSA CE CODE SAFETY PACKAGE : 2012 CE CODE SAFETY PACKAGE
    NASA STD 8719.11 : 2008 SAFETY STANDARD FOR FIRE PROTECTION
    NFPA 85C : 1991 PREVENTION OF FURNACE EXPLOSIONS & IMPLOSIONS IN MULTIPLE BURNER BOILER FURNACES
    API 1003 : 3ED 86 PRECAUTIONS AGAINST ELECTROSTATIC IGNITION DURING LOADING OF TANK TRUCK MOTOR VEHICLES
    08/30190505 DC : 0 BS ISO 12643-1 - GRAPHIC TECHNOLOGY - SAFETY REQUIREMENTS FOR GRAPHIC TECHNOLOGY EQUIPMENT AND SYSTEMS - PART 1: GENERAL REQUIREMENTS
    API 54 RUSSIAN : 19991 RECOMMENDED PRACTICE FOR OCCUPATIONAL SAFETY FOR OIL AND GAS WELL DRILLING AND SERVICING OPERATIONS
    BS ISO 12643-1:2009 Graphic technology. Safety requirements for graphic technology equipment and systems General requirements
    ANSI/AIHA/ASSP Z9.9-2010 PORTABLE VENTILATION SYSTEMS
    NFPA 409 : 2016 AIRCRAFT HANGARS
    IEEE 45.1 : 2017 IEEE Recommended Practice for Electrical Installations on Shipboard--Design
    API RP 74 : 2001 RECOMMENDED PRACTICE FOR OCCUPATIONAL SAFETY FOR ONSHORE OIL AND GAS PRODUCTION OPERATION
    API RP 2021 : 2001 MANAGEMENT OF ATMOSPHERIC STORAGE TANK FIRES
    API 2021 : 2001 : R2015 MANAGEMENT OF ATMOSPHERIC STORAGE TANK FIRES
    API 1621 : 2010 BULK LIQUID STOCK CONTROL AT RETAIL OUTLETS
    NFPA 350 : 2016 SAFE CONFINED SPACE ENTRY AND WORK
    BS PD IEC TS 60079-32-1 : 2013 EXPLOSIVE ATMOSPHERES - PART 32-1: ELECTROSTATIC HAZARDS, GUIDANCE
    ISO 12648:2006 Graphic technology Safety requirements for printing press systems
    API 54 : 1999 : R2013 RECOMMENDED PRACTICES FOR OCCUPATIONAL SAFETY FOR OIL AND GAS WELL DRILLING AND SERVICING OPERATIONS
    IEEE DRAFT 602 : D2 2006 ELECTRIC SYSTEMS IN HEALTH CARE FACILITIES
    API 1626 : 2010 STORING AND HANDLING ETHANOL AND GASOLINE-ETHANOL BLENDS AT DISTRIBUTION TERMINALS AND FILLING STATIONS
    API 14F:2008 DESIGN, INSTALLATION, AND MAINTENANCE OF ELECTRICAL SYSTEMS FOR FIXED AND FLOATING OFFSHORE PETROLEUM FACILITIES FOR UNCLASSIFIED AND CLASS 1, DIVISION 1 AND DIVISION 2 LOCATIONS
    API 540:1999 ELECTRICAL INSTALLATIONS IN PETROLEUM PROCESSING PLANTS
    API 2610:2005 DESIGN, CONSTRUCTION, OPERATION, MAINTENANCE, AND INSPECTION OF TERMINAL AND TANK FACILITIES
    API 1615 : 2011 INSTALLATION OF UNDERGROUND PETROLEUM STORAGE SYSTEMS
    EI MODEL CODE SAFE PRACTICE PT1 : 2010 THE SELECTION, INSTALLATION, INSPECTION, AND MAINTENANCE OF ELECTRICAL AND NON ELECTRICAL APPARATUS IN HAZARDOUS AREAS
    EI 1540 : 2014 DESIGN, CONSTRUCTION, COMMISSIONING, MAINTENANCE AND TESTING OF AVIATION FUELLING FACILITIES
    EI MODEL CODE SAFE PRACTICE PT7 : 1998 DESIGN, CONSTRUCTION, OPERATION AND MAINTENANCE OF AVIATION FUELLING FACILITIES
    API 2003 REDLINE : 2008 PROTECTION AGAINST IGNITIONS ARISING OUT OF STATIC, LIGHTNING, AND STRAY CURRENTS
    API 2003 : 2015 PROTECTION AGAINST IGNITIONS ARISING OUT OF STATIC, LIGHTNING, AND STRAY CURRENTS
    API 54 RUSSIAN : 1999 : R2007 RECOMMENDED PRACTICE FOR OCCUPATIONAL SAFETY FOR OIL AND GAS WELL DRILLING AND SERVICING OPERATIONS
    NFPA 8506 : 1998 HEAT RECOVERY STEAM GENERATOR SYSTEMS
    NFPA 499 : 2017 CLASSIFICATION OF COMBUSTIBLE DUSTS AND OF HAZARDOUS (CLASSIFIED) LOCATIONS FOR ELECTRICAL INSTALLATIONS IN CHEMICAL PROCESS AREAS
    ABS 0063 : 2018 COR 2018 RULES FOR BUILDING AND CLASSING FACILITIES ON OFFSHORE INSTALLATIONS
    API 74 : 2001 : R2013 RECOMMENDED PRACTICE FOR OCCUPATIONAL SAFETY FOR ONSHORE OIL AND GAS PRODUCTION OPERATION
    API RP 2027 : 2002 IGNITION HAZARDS AND SAFE WORK PRACTICES FOR ABRASIVE BLASTING OF ATMOSPHERIC STORAGE TANKS IN HYDROCARBON SERVICE
    NFPA 484 : 2015 COMBUSTIBLE METALS
    API 2027 : 2002 : R2012 IGNITION HAZARDS AND SAFE WORK PRACTICES FOR ABRASIVE BLASTING OF ATMOSPHERIC STORAGE TANKS IN HYDROCARBON SERVICE
    API 2027 : 2002 : R2007 IGNITION HAZARDS AND SAFE WORK PRACTICES FOR ABRASIVE BLASTING OF ATMOSPHERIC STORAGE TANKS IN HYDROCARBON SERVICE
    NFPA 655 : 2017 PREVENTION OF SULFUR FIRES AND EXPLOSIONS
    API 54 :1999 RECOMMENDED PRACTICES FOR OCCUPATIONAL SAFETY FOR OIL AND GAS WELL DRILLING AND SERVICING OPERATIONS
    NFPA 61D : 1989 PREVENTION OF FIRE AND DUST EXPLOSIONS IN THE MILLING OF AGRICULTURAL COMMODITIES FOR HUMAN CONSUMPTION
    NFPA 61A : 1989 PREVENTION OF FIRE AND DUST EXPLOSIONS IN FACILITIES MANUFACTURING AND HANDLING STARCH
    NFPA 61C : 1989 PREVENTION OF FIRE AND DUST EXPLOSION IN FEED MILLS
    CLC/TR 60079-32-1:2015 Explosive atmospheres - Part 32-1: Electrostatic Hazards - Guidance
    API 1615 REDLINE : 2011 INSTALLATION OF UNDERGROUND PETROLEUM STORAGE SYSTEMS
    API 14F REDLINE : 2008 DESIGN, INSTALLATION, AND MAINTENANCE OF ELECTRICAL SYSTEMS FOR FIXED AND FLOATING OFFSHORE PETROLEUM FACILITIES FOR UNCLASSIFIED AND CLASS 1, DIVISION 1 AND DIVISION 2 LOCATIONS
    NFPA 1 : 2018 FIRE CODE
    NFPA 1 HDBK : 2015 FIRE CODE HANDBOOK
    C22.1-18 Canadian Electrical Code, Part I (24th Edition), Safety Standard for Electrical Installations
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