Ex-pert Electrical Technologies

Dynamic elaboration on the Art & Science of Hazardous Area Protection

Concept Animations

Short animations for clarity of basic concept of Ex domain. The three components of Hazardous Area Explosion Concept of Explosive (Fire) Triangle The main difference between IEC 60079 and NEC … Continue reading

December 9, 2022

An artwork is worth a thousand words

Ex concepts in simple artwork / An Ex-Pert / Temperature Class differences / The 3 types of Stresses on Electrical Equipment in Ex environment / Electrical + weather + Ex … Continue reading

October 26, 2022

Stresses on Electrical equipment in Haz Loc

The Details are as follows Every electrical equipment operating in Hazardous Area (location) is always under the following stresses :- Electrical Weather Ex Ways to Clear the Ex Stresses on … Continue reading

August 23, 2021

Annex F- 60079-10-1

Release & Sources of Release Meaning of Release: Allow or enable to escape from confinement The process of releasing Whenever there is a release of (say) GAS from a gas-container it … Continue reading

December 15, 2020

Inter-linked Ex Parameters

Inter-linked Ex Parameters Quality & Quantity Poetry & Engineering   In order to ensure the safe operation of the industrial processes, safety of the involved-staff & property in Hazardous Areas, … Continue reading

January 16, 2020

ZONES Revisited

The term “ZONE” & its concept is a coordinated way to classify Hazardous Areas Before we embark on our journey into the ZONES , let us update our information about … Continue reading

December 7, 2019

ISO 80079-36 (Ed-1-2016)

Let us visit the new and informative avenue of THE IGNITION HAZARD ASSESSMENT Let us proceed.. This is the Main Entrance The essential prerequisites for exploring this avenue is as … Continue reading

March 31, 2019

Difference Between NEC & IEC

This simple Synchronizing (In fact HARMONIZING) device does not exists ……presently. The concept is there  and The Ex-perts are aware of it .  IEC cannot guide for clarity in NEC … Continue reading

January 2, 2019


A Stairway to Safety   Background Hazardous Area Area in which an explosive atmosphere is present, or may be expected to be present, in quantities such as to require special … Continue reading

December 8, 2018

Harmonics & Hazardous Area

HARMONICS   Some Definitions to start with:– From the Enchanting world of MUSIC:– An overtone accompanying a fundamental tone at a fixed interval, produced by vibration of a string, column … Continue reading

May 14, 2018

GROUPS – A multidimensional concept

GROUPS Any flammable gas or dust in mixture with air, forms an IGNITABLE EXPLOSIVE MIXTURE and if present in sufficient quantities, in an area, creates an EXPLOSIVE ATMOSPHERE and make … Continue reading

March 16, 2018

Explosive atmospheres – Part 33: Equipment protection by special protection ‘s’

Explosive atmospheres – Part 33: Equipment protection by special protection ‘s’ IEC 60079-33 ‘s  self-introduction is as follows:- The purpose of IEC 6 0079-33 special protection “s” for any equipment … Continue reading

January 28, 2018

The Most Versatile Ex Component

The most versatile component used in electrical equipment in Hazardous Areas is the ENCLOSURE. It is THE core product of almost all multinational Hazardous Area Equipment manufacturers. Analysis of Important … Continue reading

August 8, 2017

Equipment Protection Level : Made Easy

Equipment Protection Level : Made Easy In electrical engineering,  SWITCH is a  SIMPLE COMPONENT that can MAKE or BREAK an electrical circuit . (Wikipedia) The ASCENT OF THIS simple device can … Continue reading

April 12, 2017

Risk Reduction, as explained in EN 1127

Risk Reduction, as explained in EN 1127 First Step Prevention The old proverb  “an ounce of prevention is worth a pound of cure ” is the underlying philosophy of the … Continue reading

March 1, 2017

ROAD MAP to Safety

Road Map to Safety The structured road-map of EN1127 (A graphic appreciation of EN 1127) EN 1127 is a fine example of the way the present-day  Standard Documents, owned by … Continue reading

February 11, 2017

Ignition Sources

Ignition Sources in Hazardous Areas The officially recognized IGNITION SOURCES or ‘FIRE STARTERS ‘ are given in European Standard EN  1127-1 (2011). Their number is 13 !    listed as … Continue reading

January 21, 2017

Electrostatics & Hazardous Areas

Electrostatics & Hazardous Areas Static Electricity has been known since antiquity (approx.. 2500 years) but its impact on humankind was not significant enough to generate the interest of the inquisitive … Continue reading

September 25, 2016

Into the world of IEC 60079-14

The World of IEC 60079-14 IEC 60079-14 is one of the most important International Standard ,specifying the requirements for :- The Design The Selection & The Physical Set-up The Initial … Continue reading

June 5, 2016

Safety Shops

A Brief Description (North side of old downtown ….in cross stitch by RAJAA) The  old Safety Shop around the corner A safety shop is an interesting place , to visit … Continue reading

April 16, 2016

Dos & Don’t s of Hazardous Area

Dos & Don’t s of Hazardous Area Protection Hazardous Area Protection (HAP) is a multidimensional Process. Each , apparently, independent parameter is in fact closely related to the others . … Continue reading

November 6, 2015

IEC 60079 Application

APPLICATION of IEC 60079 (IEC 60079 driving the Safe, Oil & Gas Industry) IEC 60079 is a set of documents with details of Standards & Specifications which encompasses all aspects … Continue reading

July 8, 2015


  Industry 4.0 & Ex 4.0 The term “Industry 4.0” refers to the anticipated upcoming INDUSTRIAL REVOLUTION No.4.0 The term Industrial Revolution was popularized by the Economic Historian Arnold Toynbee … Continue reading

June 1, 2015

Intrinsic Safety (IS)

Intrinsic Safety (IS) Technical Guideline : IEC 60079-11 (edition: 6.00 2011-06) Definition Type of protection based on the restriction of electrical energy within equipment and of interconnecting wiring exposed to … Continue reading

March 23, 2015

Introduction to Expertdesk

expert-desk FROM THE EXPERT DESK INFORMATION Paper 1 THE NEW ATEX DIRECTIVE A simple modular description Concept & Source  : our experts

January 31, 2015

Temperature Class

Temperature Class The concept of Temperature Class is best described by IEC 60079.0 by combining definitions, tables and specification , thus  creating a road-map to clarity Let us follow that … Continue reading

July 18, 2014

IEC 62305-Protection Against Lightning

IEC 62305-Series of documents (Standards) is one of the most comprehensive set of Guide-Lines for the concerned professional of the respective trade, for the PROTECTION AGAINST LIGHTNING. The series consists … Continue reading

June 22, 2014

Increased Safety Terminal Box Power Dissipation

Maximum dissipated power of Terminal Box Enclosure IEC 60079-14 Let us first define an Electrical  Terminal / Junction Box An electrical junction  / Terminal box  is a container for electrical connections, … Continue reading

May 29, 2014

Optical Radiation Hazard

Optical Radiation : Ignition Risk & protection in Hazardous Areas   The industrial use of equipment, utilizing OPTICAL RADIATION , is increasing day-by-day. The most common use is in the fields of … Continue reading

April 22, 2014

Ex Terminology

 Ex Terminology Class  ( locations) Creepage & Clearance Equipment Protection Level EPL Explosion Explosive Atmosphere Explosive Gas Atmosphere Explosive Dust Atmosphere  Explosive Limits (upper & Lower Explosive) Flammable Substance Flash point … Continue reading

March 15, 2014