Intro
Foreword
Preface
Contents
About the Author
1 Overview of Hazardous Locations
1.1 Introduction
1.2 Technological Approach
1.3 Area Classification
1.3.1 Categorization of Sources of Release
1.3.2 Area Classification as Per National Electrical Code of USA (NEC)
1.3.3 Area Classification as Per IEC
1.3.4 Parameters Affect the Extent of Hazards
1.4 Comparison Between IEC and NEC
1.5 Temperature Classification
1.5.1 Temperature Classification as Per IEC 60079-0:2017
1.5.2 Temperature Classification as Per NEC

1.5.3 Temperature Classification as Per NEC 503 [12] for Class III Apparatus
1.5.4 Harmonization of NEC Codes with IEC
1.6 Product Code
1.7 Testing and Certification of Products
1.8 Quality Control of Product
1.9 Selection of Ex Equipment
1.10 Equipment Protection Level (EPL)
1.11 Ex Marking for Explosive Gas Atmospheres
1.11.1 Certificate and Marking Information
References
2 Type of Explosion Protection
2.1 Introduction
2.2 Flameproof or Explosion-Proof, Ex 'd'
2.2.1 Design Parameters of Flameproof Equipment

2.2.2 Joint Between External Atmosphere and Interior of Flameproof Enclosure
2.2.3 Construction of the Flameproof Enclosure
2.2.4 Lamp Holder
2.2.5 Material of Construction of Flameproof Product
2.2.6 Test for a Flameproof Apparatus
2.3 Intrinsic Safety Ex 'i'
2.3.1 Introduction
2.3.2 Principles of Intrinsic Safety
2.3.3 Methods to Avoid Spark and Hot Surfaces
2.3.4 Level of Protection of I.S. Apparatus
2.3.5 Assessment for Compliance as Per IEC60079-11
2.3.6 Construction Requirement of I.S. Apparatus as Per IEC60079-11
2.3.7 Components on Which I.S. Depends

2.3.8 Infallible Components Requirements
2.3.9 Specific Test Requirements as Per IEC60079-11
2.3.10 Simple Apparatus
2.3.11 Associated Apparatus
2.3.12 Marking
2.4 Increased Safety Ex 'e'
2.4.1 Introduction
2.4.2 Limiting Temperature
2.4.3 Ratio Starting Current
2.4.4 Safe Time tE
2.4.5 General Requirements for Ex 'e' Equipment
2.4.6 Drop Test
2.4.7 Terminals and Wiring
2.4.8 Temperature Class
2.4.9 Cable and Cable Entry
2.4.10 Increased Safety Lightings
2.4.11 Increased Safety Fluorescent Fitting

2.4.12 Requirement for Increased Safety Luminaries
2.4.13 Increased Safety Motor
2.4.14 Battery Box for Moving Vehicle
2.4.15 Electrical Heating Device (EHD)
2.5 Non-sparking
2.5.1 Introduction
2.5.2 Construction of Type 'n' Enclosure
2.5.3 Mechanical Strength of the Type 'n' Enclosure
2.5.4 Non-sparking Lightings
2.5.5 Restricted Breathing Type of Enclosure
2.5.6 Non-sparking Fluorescent Tube Light Fitting
2.5.7 Temperature Class
2.5.8 Non-sparking Rotating Machines
2.6 Purge-Protected Ex 'p'
2.6.1 Introduction
2.6.2 Condition for Pressurization