File Name: electrical equipment and installations in hazardous areas .zip
Unit Descriptor. This unit covers the explosion-protection aspects planning electrical installations for hazardous areas It requires the ability to identify hazardous area zones from classification diagrams, or from examples of previously classified areas or those given in Standards, and to select and locate explosion-protected equipment and wiring systems and other items that may influence the explosion-protection technique.
This unit is directly equivalent to the Unit 2. Equivalence includes endorsement in the explosion-protection techniques listed in the Range statement of this unit. Application of the Unit. This unit augments other formally-acquired competencies in a relevant industry and shall be used only in conjunction such competencies.
It applies to electrical, instrumentation, electronics and data communication design job functions. Examples of relevant industries include aviations, electrical installation and maintenance, fuel storage and dispensing industrial process, instrumentation and control, marine, material handling and storage, mining, and petrochemical. The skills and knowledge described in this unit do not require a license to practice in the work place.
However practice in this unit is subject to regulations directly related to occupational health and safe and contracts of training such as new apprenticeships. Prerequisite Unit s. Granting competency in this unit shall be made after or concurrently with confirming competency in any one of the following units:. Install explosion-protected equipment and wiring systems gas atmospheres.
Examples are but not limited to :. Plan electrical installations with a low voltage demand up to A per phase. Verify compliance and functionality of instrumentation and control installations. Employability Skills. The required outcomes described in this unit of competency contain applicable facets of Employability Skills. The Employability Skills Summary of the qualification in which this unit of competency is packaged will assist in identifying Employability Skill requirements.
Performance criteria describe the required performance needed to demonstrate achievement of the element. Assessment of performance is to be consistent with the evidence guide.
Nature and characteristics of explosion hazards in the area are identified from plant specifications. In the absence of classification documentation, arrangements are made to ensure the explosion hazard in the area is assessed and the area classified.
Classification, extent of zonings of the area, gas groups and temperature class are verified by reference to classification documents or Standards in which the explosion hazard, area classification and zonings are clearly identified. Equipment and accessories are selected to suit area activities and comply with explosion-protection requirements. Wiring systems are selected to suit area activities, and comply with explosion-protection, load and duty requirements.
Equipment compliance certification is checked for suitability for the area classification and zonings. Cables and accessories are checked for suitability for the area classification and zonings and load and duty requirements.
Installation specifications are documented in accordance with established procedures and requirements. Arrangements are made to file as-built installation documentation in the verification dossier in accordance with established procedures and requirements. Evidence shall show that knowledge has been acquired of safe working practices and designing electrical installations in hazardous areas. All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies.
Hazardous areas electrical installation planning. Evidence shall show an understanding of hazardous areas electrical installation planning to an extent indicated by the following aspects:. T1 Occupational Health and Safety responsibilities related to hazardous areas encompassing:. T2 The roles of the parties involved in the safety of hazardous areas encompassing:.
T3 Properties of combustible substances and their potential to create an explosive hazard encompassing:. T6 Explosion-protection equipment — Ex certification schemes encompassing:.
T13 Common characteristics of explosion-protection techniques encompassing:. T14 Preparation to install and maintain explosion-protected equipment in hazardous areas encompassing:.
T16 Installation Standards and requirements applicable to hazardous encompassing:. T17 Cable termination types suitable for use in hazardous areas encompassing:. T18 Interpretation of documents showing the classification of a hazardous area encompassing:.
T19 Selecting and checking equipment, wiring and accessories encompassing:. T20 Documentation of hazardous area installation design encompassing:. T21 Common and specific hazardous areas for which classification examples are given in Standards encompassing:.
The Evidence Guide forms an integral part of this unit. It must be used in conjunction with all components parts of this unit and performed in accordance with the Assessment Guidelines of this Training Package.
Overview of Assessment. Longitudinal competency development approaches to assessment, such as Profiling, require data to be reliably gathered in a form that can be consistently interpreted over time. This approach is best utilised in Apprenticeship programs and reduces assessment intervention.
It is the industry-preferred model for apprenticeships. However, where summative or final assessment is used it is to include the application of the competency in the normal work environment or, at a minimum, the application of the competency in a realistically simulated work environment. It is recognised that, in some circumstances, assessment in part or full can occur outside the workplace. However, it must be in accord with industry and regulatory policy.
Methods chosen for a particular assessment will be influenced by various factors. These include the extent of the assessment, the most effective locations for the assessment activities to take place, access to physical resources, additional safety measures that may be required and the critical nature of the competencies being assessed.
Sources of evidence need to be 'rich' in nature to minimise error in judgment. Some skills are more critical to safety and operational requirements while the same skills may be more or less frequently practised. These points are raised for the assessors to consider when choosing an assessment method and developing assessment instruments.
Sample assessment instruments are included for Assessors in the Assessment Guidelines of this Training Package. Critical aspects of evidence required to demonstrate competency in this unit.
Before the critical aspects of evidence are considered all prerequisites shall be met. Evidence for competence in this unit shall be considered holistically. Each element and associated performance criteria must be demonstrated on at least two occasions in accordance with the 'Assessment Guidelines - UEE07'. Evidence shall also comprise:. Checking equipment certification for suitability for a given classified area. Documenting as-built installation. Context of and specific resources for assessment.
This unit should be assessed as it relates to normal work practice using procedures, information and resources typical of a workplace. This should include:. Where simulation is considered a suitable strategy for assessment, conditions must be authentic and as far as possible reproduce and replicate the workplace and be consistent with the approved industry simulation policy.
The resources used for assessment should reflect current industry practices in relation to designing electrical installations in hazardous areas. Method of assessment. This unit shall be assessed by methods given in Volume 1, Part 3 'Assessment Guidelines'. Competent performance with inherent safe working practices is expected in the Industry to which this unit applies. Concurrent assessment and relationship with other units.
For optimisation of training and assessment effort, competency development in this unit may be arranged concurrently any of the following units:. It allows for different work environments and situations that will affect performance. This unit shall be demonstrated in relation to any classified gas hazardous area and all the following explosion-protection techniques:. Generic terms used throughout this Vocational Standard shall be regarded as part of the Range Statement in which competency is demonstrated.
The definition of these and other terms that apply are given in Volume 2, Part 2. Participants are best equipped to achieve competency in this unit if they have reading, writing and numeracy skills indicated by the following scales.
Description of each scale is given in Volume 2, Part 3 'Literacy and Numeracy'. Competency Field. Note: Examples of relevant industries include aviations, electrical installation and maintenance, fuel storage and dispensing industrial process, instrumentation and control, marine, material handling and storage, mining, and petrochemical.
Verify hazardous classification for the area. Select and check equipment, wiring and accessories. Document installation plan. Visible conditions or actions that would void the explosion-protection provided by a particular technique. T6 Explosion-protection equipment — Ex certification schemes encompassing: Purpose and scope of certification schemes. Schemes accepted in Australia and New Zealand.
Schemes commonly used in countries other than Australia and New Zealand. Processes for having equipment certified under the acceptable Ex schemes — scheme procedures; quality management requirements; conformance testing and assessment; and requirements for ongoing certification. Examples of characteristics and design features are flame paths, integrity under pressure, pressure piling, and enclosure entries.
Typical situations where the flameproof explosion-protection technique is used; Actions or conditions that would void the protection provided the Flameproof technique; The use of Standards in determining the requirements to which the installation of flameproof explosion-protected apparatus shall comply.
Typical situations where the Increased safety explosion-protection technique is used; Actions or conditions that would void the protection provided the Increased safety technique; The use of Standards in determining the requirements to which the installation of Increased safety explosion-protected apparatus shall comply. Typical situations where the Non-sparking explosion-protection technique is used; Actions or conditions that would void the protection provided the Non-sparking technique; and The use of Standards in determining the requirements to which the installation of Non-sparking explosion-protected apparatus shall comply.
Typical situations where the Intrinsic safety explosion-protection technique is used; Actions or conditions that would void the protection provided the Intrinsic safety; The use of Standards in determining the requirements to which the installation of Intrinsic safety explosion-protected apparatus shall comply.
Skip to Main Content. A not-for-profit organization, IEEE is the world's largest technical professional organization dedicated to advancing technology for the benefit of humanity. Use of this web site signifies your agreement to the terms and conditions. Installation techniques and practices of IEC hazardous area equipment "The nuts and bolts of a good installation" Abstract: The world standards for classifying hazardous areas are now closely harmonized. This paper begins to sort out the nuts-and-bolts issues that an electrical designer and construction engineer will need to understand in order to properly design, install, wire and terminate an IEC type project. The topics that are addressed include installation techniques, wiring methods with cabling and conduit, lighting practices, and terminating armored cables in metallic and nonmetallic enclosures. The end product serves as a preliminary guide for engineers who need a thorough reference to design and install electrical equipment in areas outside of North America.
Unit Descriptor. This unit covers the explosion-protection aspects planning electrical installations for hazardous areas It requires the ability to identify hazardous area zones from classification diagrams, or from examples of previously classified areas or those given in Standards, and to select and locate explosion-protected equipment and wiring systems and other items that may influence the explosion-protection technique. This unit is directly equivalent to the Unit 2. Equivalence includes endorsement in the explosion-protection techniques listed in the Range statement of this unit. Application of the Unit. This unit augments other formally-acquired competencies in a relevant industry and shall be used only in conjunction such competencies.
Botrill, G. Practical electrical equipment and installations in hazardous areas. (Practical professional). 1. Electric apparatus and appliances – installation – safety.
This book provides the reader with an understanding of the hazards involved in using electrical equipment in Potentially Explosive Atmospheres. It is based on the newly adopted international IEC79 Series of Standards that are now harmonizing and replacing older national Standards. Explosion-proof installations can be expensive to design, install and operate. The strategies and techniques described in this book can significantly reduce costs whilst maintaining plant safety. The book explains the associated terminology and its correct use - from Area Classification through to the selection of explosion-protected electrical apparatus, describing how protection is achieved and maintained in line with these international requirements.
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