Hazardous Locations Cable Glands (IECEx, ATEX and North American).
Cable glands are used as cable entry devices to provide a safe connection of suitable cables to enclosures and maintain the ingress properties of the installation. In hazardous area classified areas they also need to maintain the explosion protection of equipment.
The IECEx & ATEX certified cable glands for use in Zone 1 (Gas Group) are:
i) II 2G Ex db – Per Standard IEC/EN 60079-1 (Flameproof)
ii) II 2G Ex eb – Per Standard IEC/EN 60079-7 (Increased Safety)
IEC 60079-1:2014 is available as IEC 60079-1:2014 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 60079-1:2014 contains specific requirements for the construction and testing of electrical equipment with the type of protection flameproof enclosure “d”, intended for use in explosive gas atmospheres. This standard supplements and modifies the general requirements of IEC 60079-0. Where a requirement of this standard conflicts with a requirement of IEC 60079-0, the requirement of this standard will take precedence. This seventh edition cancels and replaces the sixth edition, published in 2007, and constitutes a technical revision. The numerous changes are identified in the Foreward of the document. Keywords: flameproof enclosure “d”, explosive gas atmospheres.
IEC 60079-7:2015 specifies the requirements for the design, construction, testing and marking of electrical equipment and Ex Components with type of protection increased safety “e” intended for use in explosive gas atmospheres. Electrical equipment and Ex Components of type of protection increased safety “e” are either:
– Level of Protection “eb” (EPL “Mb” or “Gb”); or
– Level of Protection “ec” (EPL “Gc”). Level of Protection “eb” applies to equipment or Ex Components, including their connections, conductors, windings, lamps, and batteries; but not including semiconductors or electrolytic capacitors.
Level of Protection “ec” applies to equipment or Ex Components, including their connections, conductors, windings, lamps, and batteries; and also including semiconductors and electrolytic capacitors.
In North America, cables and cable glands need to be approved for both ordinary locations and hazardous locations. Also, installation of cable glands are limited to those cables that have been designed, tested and approved for Class 1 Division 1 C1D1, cable seals are required at all terminations.
“Class I, Division 1” Cable Glands:
i) Per Standards CSA C22.2 No. 18.3 (O/L) & CSA C22.2 No. 174 (H/L) for Canada
ii) Per Standards UL 514B (O/L) & UL 2225 (H/L) for the USA.
Note: “AEx db” and “AEx eb” glands need to comply with UL 2225 for installation in hazardoud Zone 1.
Typical Class 1 Division 1 Cable Sealing Using Glands for Hazardous Locations | Image CMP Cable Glands
Information Courtesy
Author Behzad Nejad, P. Eng. (Hazcon)
Director & Consulting Engineer at Hazcon Inc.; Hazardous Locations Consulting Services; IECEx, ATEX, CEC & NEC
Specializing in the design, safety and approval of electrical equipment for hazardous locations.Â
Mr. Nejad has over 15 years of experience as an Electrical Engineer and is a sought after professional in the hzardous area and explosion protection industry. He is fully-qualified at the advanced level of all hazardous locations protection techniques including Intrinsic Safety & Non-incendive, Explosion Proof & Flame proof, Increased Safety, Non-arcing, Purging and Pressurization, Encapsulation, Optical Radiation, and Dust-tight enclosures. Mr. Nejad’s tenure in the industry includes six years at the CSA certification agency, working closely with manufacturers (Emerson, GE, ABB, Siemens, Endress-Houser, VEGA etc.) as a technical and certification engineer for Hazardous locations equipment.
The opinions expressed in this article are those of the author.
Thorne & Derrick are leaders in the development and distribution of Product Innovations that deliver significant improvements to clients plant, people and operational safety in the explosive atmosphere industries.
Your proactive problem solvers experienced in succession planning for the replacement of obsolete, non-conformant and legacy equipment in hazardous areas.
Your first-choice provider of innovative and competitive solutions to ensure ATEX & IECEx Compliance for Hazardous Area Electrical, HVAC & Process Instrumentation Equipment to UK and international projects.
Control Panels | Plugs | Isolators | Enclosures & Junction Boxes | Lighting | Control Stations | Motor Starters | Heat Trace | Gas Detection | Flame Detection | Process Instrumentation | Process Heating | Ventilation Fans | Security Access ControlÂ
Competitive Prices | Extensive Stocks | Technical Support | Express Delivery
The Importance of Grounding of Intrinsically Safe Devices in hazardous areas.
Intrinsic safety is system concept and it prevents explosion in hazardous areas by limiting electrical energy. The IS device which is installed in a classified area needs to be connected to a source of power (IS barrier) by cabling. Therefore, possible faults within the power system and cabling need to be considered.
When faults occur within safe area, the ground (earth) wire connected to the barrier busbar will provide a return path to the main earth mat or neutral star point of the distribution transformer.
But how about when power faults occur within the hazardous area and cause the power voltage to be appeared on the metal enclosure of the IS device?
A grounding facility is required for all electrical equipment with metal enclosures (including IS devices) to divert large fault current into a low-impedance return path and preventing high voltage being generated in hazardous area.
Per Article 504.50 of NFPA70 and Rule 18-072 of CEC: “Intrinsically Safe apparatus with metal enclosure shall be connected to equipment grounding conductor”.
Information Courtesy
Author Behzad Nejad, P. Eng. (Hazcon)
Director & Consulting Engineer at Hazcon Inc.; Hazardous Locations Consulting Services; IECEx, ATEX, CEC & NEC
Specializing in the design, safety and approval of electrical equipment for hazardous locations.Â
Mr. Nejad has over 15 years of experience as an Electrical Engineer and is a sought after professional in the hzardous area and explosion protection industry. He is fully-qualified at the advanced level of all hazardous locations protection techniques including Intrinsic Safety & Non-incendive, Explosion Proof & Flame proof, Increased Safety, Non-arcing, Purging and Pressurization, Encapsulation, Optical Radiation, and Dust-tight enclosures. Mr. Nejad’s tenure in the industry includes six years at the CSA certification agency, working closely with manufacturers (Emerson, GE, ABB, Siemens, Endress-Houser, VEGA etc.) as a technical and certification engineer for Hazardous locations equipment.
The opinions expressed in this article are those of the author.
Thorne & Derrick are leaders in the development and distribution of Product Innovations that deliver significant improvements to clients plant, people and operational safety in the explosive atmosphere industries.
Your proactive problem solvers experienced in succession planning for the replacement of obsolete, non-conformant and legacy equipment in hazardous areas.
Your first-choice provider of innovative and competitive solutions to ensure ATEX & IECEx Compliance for Hazardous Area Electrical, HVAC & Process Instrumentation Equipment to UK and international projects.
Control Panels | Plugs | Isolators | Enclosures & Junction Boxes | Lighting | Control Stations | Motor Starters | Heat Trace | Gas Detection | Flame Detection | Process Instrumentation | Process Heating | Ventilation Fans | Security Access ControlÂ
Competitive Prices | Extensive Stocks | Technical Support | Express Delivery
“Ex pyb“ Marking for Purging and Pressurization Technique for hazardous use in “Zone 1“.
In accordance with standard IEC 60079-2, “Ex pyb” marking provides Equipment Protection Level (EPL) Gb with EPL Gc internal to the pressurized enclosure. It simply means the internal components must be evaluated against hazardous location Zone 2.
“Zone 2” products require IP54 rated enclosure and in some cases the enclosure will need to be provided in end-use application (i.e. Zone 2 Power Supply). The positive pressure inside the pressurized enclosure will provide a safe area inside and prevent ingress of dust and water into the enclosure.
The internal “Zone 2” products must not remain energized when the the type of explosion protection “pyb” is not in operation as there is no IP54 enclosure in effect.
In case of use of batteries inside enclosure which remain energized, Annex G and H of IEC 60079-2 provide additional safety requirement.
The Ex marking is “Ex pyb IIC T4 Gb” without any Zone 2 markings that are used for internal components. Do you think a QAR with Zone 2 protection technique(s) is needed while the marking in IECEx CofC shows only EPL Gb?
Information Courtesy
Author Behzad Nejad, P. Eng. (Hazcon)
Director & Consulting Engineer at Hazcon Inc.; Hazardous Locations Consulting Services; IECEx, ATEX, CEC & NEC
Specializing in the design, safety and approval of electrical equipment for hazardous locations.Â
Mr. Nejad has over 15 years of experience as an Electrical Engineer and is a sought after professional in the hzardous area and explosion protection industry. He is fully-qualified at the advanced level of all hazardous locations protection techniques including Intrinsic Safety & Non-incendive, Explosion Proof & Flame proof, Increased Safety, Non-arcing, Purging and Pressurization, Encapsulation, Optical Radiation, and Dust-tight enclosures. Mr. Nejad’s tenure in the industry includes six years at the CSA certification agency, working closely with manufacturers (Emerson, GE, ABB, Siemens, Endress-Houser, VEGA etc.) as a technical and certification engineer for Hazardous locations equipment.
The opinions expressed in this article are those of the author.
Thorne & Derrick are leaders in the development and distribution of Product Innovations that deliver significant improvements to clients plant, people and operational safety in the explosive atmosphere industries.
Your proactive problem solvers experienced in succession planning for the replacement of obsolete, non-conformant and legacy equipment in hazardous areas.
Your first-choice provider of innovative and competitive solutions to ensure ATEX & IECEx Compliance for Hazardous Area Electrical, HVAC & Process Instrumentation Equipment to UK and international projects.
Control Panels | Plugs | Isolators | Enclosures & Junction Boxes | Lighting | Control Stations | Motor Starters | Heat Trace | Gas Detection | Flame Detection | Process Instrumentation | Process Heating | Ventilation Fans | Security Access ControlÂ
Competitive Prices | Extensive Stocks | Technical Support | Express Delivery
Presented & Hosted By Mike Marrington | Partner at IndEx Middle East FZE
Visit https://www.ind-ex.ae/
Uploaded By Chris Dodds | Sales Marketing Manager at Thorne & DerrickÂ
In this Webinar Mike provides an authoritative and technical presentation covering the complexity of Explosive Atmospheres and Personnel Competencies – an expert and essential session for professionals involved in hazardous areas the resource covers:
Experts | 20+ Years of Experience in Explosion Protection
IndEx Middle East FZE are an internationally accredited IECEx compliance service provider to hazardous areas engineering in the Gulf Region. IndEx Middle East is an accredited IECEx compliance service provider – the first one in the Middle East offering full IECEx compliance services from the initial project concept to handover. IndEx deliver full IECEx scheme compliance services, competence training and equipment assessment based upon the latest IEC international standards – this includes the inspection and audit of existing brownfield installations and Ex rated equipment. Assisting and sharing responsibility in the determination of proper hazardous area located Ex rated equipment and installations with project and site based maintenance personnel. Get in touch.
Gases, vapours, mists and dusts can all form potentially explosive atmospheres with air.
Hazardous Area Classification (HAC) is used to identify places where, because of the potential for an explosive atmosphere, special precautions over sources of ignition are needed to prevent fires and explosions. Hazardous area classification should be carried out to identify places (or areas) where controls over ignition sources are needed and those places where they are not. Hazardous areas are further classified into Zones / Class & Divisions / Classes & Zones, which distinguish between places that have a high chance of an explosive atmosphere occurring and those places where an explosive atmosphere may only occur occasionally or in abnormal circumstances. Learn more.
Experts In Equipment for Explosive Atmospheres with ATEX & IECEx Certification
T&D are your first-choice provider of innovative and competitive solutions to ensure ATEX & IECEx Compliance for Hazardous Area Electrical, HVAC & Process Instrumentation Equipment to your UK and international projects.
We can specify and supply from stock an extensive range of Explosion Proof Ex d Equipment to provide safe flameproof lighting, power distribution, isolation and cable termination in explosive atmospheres.
Isolators | Enclosures | Glands & Terminations | Light Fittings | Flameproof Equipment
Control Panels | Plugs | Isolators | Enclosures & Junction Boxes | Lighting | Control Stations | Motor Starters | Heat Trace | Gas Detection | Flame Detection | Process Instrumentation | Process Heating | Ventilation Fans | Security Access ControlÂ
Competitive Prices | Extensive Stocks | Technical Support | Express Delivery
Presented & Hosted By Mike Marrington | Partner at IndEx Middle East FZE
Visit https://www.ind-ex.ae/
Uploaded By Chris Dodds | Sales Marketing Manager at Thorne & DerrickÂ
In this Webinar Mike provides an authoritative and technical presentation covering the complexity of Explosive Atmospheres and Personnel Competencies – an expert and essential session for professionals involved in hazardous areas the resource covers:
Experts | 20+ Years of Experience in Explosion Protection
IndEx Middle East FZE are an internationally accredited IECEx compliance service provider to hazardous areas engineering in the Gulf Region. IndEx Middle East is an accredited IECEx compliance service provider – the first one in the Middle East offering full IECEx compliance services from the initial project concept to handover. IndEx deliver full IECEx scheme compliance services, competence training and equipment assessment based upon the latest IEC international standards – this includes the inspection and audit of existing brownfield installations and Ex rated equipment. Assisting and sharing responsibility in the determination of proper hazardous area located Ex rated equipment and installations with project and site based maintenance personnel. Get in touch.
Gases, vapours, mists and dusts can all form potentially explosive atmospheres with air.
Hazardous Area Classification (HAC) is used to identify places where, because of the potential for an explosive atmosphere, special precautions over sources of ignition are needed to prevent fires and explosions. Hazardous area classification should be carried out to identify places (or areas) where controls over ignition sources are needed and those places where they are not. Hazardous areas are further classified into Zones / Class & Divisions / Classes & Zones, which distinguish between places that have a high chance of an explosive atmosphere occurring and those places where an explosive atmosphere may only occur occasionally or in abnormal circumstances. Learn more.
Experts In Equipment for Explosive Atmospheres with ATEX & IECEx Certification
T&D are your first-choice provider of innovative and competitive solutions to ensure ATEX & IECEx Compliance for Hazardous Area Electrical, HVAC & Process Instrumentation Equipment to your UK and international projects.
We can specify and supply from stock an extensive range of Explosion Proof Ex d Equipment to provide safe flameproof lighting, power distribution, isolation and cable termination in explosive atmospheres.
Isolators | Enclosures | Glands & Terminations | Light Fittings | Flameproof Equipment
Control Panels | Plugs | Isolators | Enclosures & Junction Boxes | Lighting | Control Stations | Motor Starters | Heat Trace | Gas Detection | Flame Detection | Process Instrumentation | Process Heating | Ventilation Fans | Security Access ControlÂ
Competitive Prices | Extensive Stocks | Technical Support | Express Delivery
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