Explosion Protection Archives

A flameproof Ex db enclosure has a 32mm entry and we need to use it for a 20mm cable gland, is it permissible to use two reducers to achieve this?

Yes, BS EN IEC 60079-14, the standard for electrical installation of equipment states that to accommodate the entry devices and other fittings it is permitted to use either a single adapter; or one adapter with one reducer; or a maximum of two reducers. The standard also states that a blanking element (stopping plug) shall not […]

I have an Ex eb electric motor which is labelled as T3, I understand this to mean that the temperature reached by any part of the motor will not be any greater than 200°C. Is this the case and do I need to consider ambient temperature effects?

This is true, but the equipment must be installed in a location where the ambient temperature range does not exceed the ambient temperature range that the equipment has been designed for.

If an enclosure is marked II 2 GD and also Ex db IIC T5 Gb IP 66, Ex tb IIIC T100 Db, what is the meaning of the upper case and the lower case ‘d’s?

The upper case D is part of the ATEX labelling and indicates that the equipment is for use in areas where the explosion hazard is Dust (the G indicates Gas Hazard). The lower case d indicates the method of Ex protection, in this case flameproof.

Header Column #1
Industries	Principal to all Ex environments, with direct application in hazardous vapour and gas environments.
Entry Qualifications Guidance	Level 3, ECS Gold Card, National Diploma or equivalent. Disipline: Electrotechnical Instrumentation Subject to knowledge, skill and experience candidates may benefit from Ex F+
Entry Knowledge - Expected	Knows the relevant legislative, regulatory, local requirements Understands procedures for safe working practice and systems of work in an industrial setting Can read and interpret relevant engineering drawings, related specifications, quality standards and equipment manuals Understands the hierarchy of responsibilities in relation to reporting and decision-making
Entry Skills - Expected	Practical skills in engineering assembly of a complexity consistent with that of a level 3 craftsperson Can apply safe working practices including safe isolation to meet the requirements of statutory and non-statutory regulations Can safely install, inspect, test, commission, diagnose and correct faults in electrical plant, instrumentation, associated cabling, cabling supports and equipment Can select, gland & terminate industrial type cables to a suitable component and associated cable tray in line with details on the appropriate specification Can interpret manufacturers documentation for correct installation,maintenance and inspection
Job Roles Aspiring to or operating in	Installation or Maintenance Electrician Electrical or Instrument Technician Engineers
Entry Experience Guidance	2 + years' experience operating in a site / industrial environment Installing, inspecting, testing and/or maintaining equipment in an industrial setting
Entry Knowledge - Desirable	Understands the need for and methods of achieving safe working practice in gas and vapour Ex environments Has basic practical, theoretical and technological knowledge and understanding of gas and vapour Ex environments Has a basic understanding of the requirements, materials and equipment considerations, in relation to working in gas and vapour Ex environments
Entry Skills - Desirable	Can select and install a variety of Ex certified cables glands and terminate conductors into equipment Can understand the principles of electrical protection concepts including selection, installation and maintenance Understands intrinsically safe concept of protection and installation including the importance of documentation Can inspect new and existing equipment in accordance with appropriate inspection techniques relevant to the different grades of inspection

Header Column #1

Industries

Principal to all Ex environments, with direct application in hazardous vapour and gas environments.

Entry Qualifications
Guidance

Level 3, ECS Gold Card, National Diploma or equivalent. Disipline:

Electrotechnical
Instrumentation

Subject to knowledge, skill and experience candidates may benefit from Ex F+

Entry Knowledge - Expected

Knows the relevant legislative, regulatory, local requirements
Understands procedures for safe working practice and systems of work in an industrial setting
Can read and interpret relevant engineering drawings, related specifications, quality standards and equipment manuals
Understands the hierarchy of responsibilities in relation to reporting and decision-making

Entry Skills - Expected

Practical skills in engineering assembly of a complexity consistent with that of a level 3 craftsperson
Can apply safe working practices including safe isolation to meet the requirements of statutory and non-statutory regulations
Can safely install, inspect, test, commission, diagnose and correct faults in electrical plant, instrumentation, associated cabling, cabling supports and equipment
Can select, gland & terminate industrial type cables to a suitable component and associated cable tray in line with details on the appropriate specification
Can interpret manufacturers documentation for correct installation,maintenance and inspection

Job Roles
Aspiring to or operating in

Installation or Maintenance Electrician
Electrical or Instrument Technician
Engineers

Entry Experience
Guidance

2 + years' experience operating in a site / industrial environment
Installing, inspecting, testing and/or maintaining equipment in an industrial setting

Entry Knowledge - Desirable

Understands the need for and methods of achieving safe working practice in gas and vapour Ex environments
Has basic practical, theoretical and technological knowledge and understanding of gas and vapour Ex environments
Has a basic understanding of the requirements, materials and equipment considerations, in relation to working in gas and vapour Ex environments

Entry Skills - Desirable

Can select and install a variety of Ex certified cables glands and terminate conductors into equipment
Can understand the principles of electrical protection concepts including selection, installation and maintenance
Understands intrinsically safe concept of protection and installation including the importance of documentation
Can inspect new and existing equipment in accordance with appropriate inspection techniques relevant to the different grades of inspection

Header Column #1
Industries	Principal to all Ex environments, with direct application in hazardous vapour and gas environments.
Entry Qualifications Guidance	Level 3, ECS Gold Card, National Diploma or equivalent. Disipline: Electrotechnical Instrumentation Subject to knowledge, skill and experience candidates may benefit from Ex F+
Entry Knowledge - Expected	Knows the relevant legislative, regulatory, local requirements Understands procedures for safe working practice and systems of work in an industrial setting Can read and interpret relevant engineering drawings, related specifications, quality standards and equipment manuals Understands the hierarchy of responsibilities in relation to reporting and decision-making
Entry Skills - Expected	Practical skills in engineering assembly of a complexity consistent with that of a level 3 craftsperson Can apply safe working practices including safe isolation to meet the requirements of statutory and non-statutory regulations Can safely install, inspect, test, commission, diagnose and correct faults in electrical plant, instrumentation, associated cabling, cabling supports and equipment Can select, gland & terminate industrial type cables to a suitable component and associated cable tray in line with details on the appropriate specification Can interpret manufacturers documentation for correct installation,maintenance and inspection
Job Roles Aspiring to or operating in	Installation or Maintenance Electrician Electrical or Instrument Technician Engineers
Entry Experience Guidance	2 + years' experience operating in a site / industrial environment Installing, inspecting, testing and/or maintaining equipment in an industrial setting
Entry Knowledge - Desirable	Understands the need for and methods of achieving safe working practice in gas and vapour Ex environments Has basic practical, theoretical and technological knowledge and understanding of gas and vapour Ex environments Has a basic understanding of the requirements, materials and equipment considerations, in relation to working in gas and vapour Ex environments
Entry Skills - Desirable	Can select and install a variety of Ex certified cables glands and terminate conductors into equipment Can understand the principles of electrical protection concepts including selection, installation and maintenance Understands intrinsically safe concept of protection and installation including the importance of documentation Can inspect new and existing equipment in accordance with appropriate inspection techniques relevant to the different grades of inspection