hazardous area safe working practices, including: WHS/OHS responsibilities related to hazardous areas: the main features and purpose of a clearance to work (including hot work permit systems) system typical safety procedures that should be followed before entering a hazardous area the purpose of gas detectors and their use and limitations effects of temperature on gas and vapour detection; frequency of monitoring for presence of gas or vapours, i.e. effects of temperature rise; factors affecting the accuracy of gas detectors, for example, contamination, condensation, temperature; and safety in use of gas detectors, for example, read and run concept safety measures to be taken when working in a hazardous area the roles of the parties (including standard bodies and experienced consultants) involved in the safety of hazardous areas: common Acts and regulations related to the safety of hazardous areas and the authorities responsible for their implementation; where assistance and further information can be obtained to assist persons with hazardous area responsibilities: persons with hazardous area responsibilities, including the hazardous area responsibilities of the owner of premises in which a hazardous area exists; the occupier of premises in which a hazardous area exists; enterprises and personnel engaged in installation and/or maintenance of explosion-protection systems; enterprises and personnel engaged in the classification of hazardous areas and/or design of explosion-protection systems; enterprises and personnel engaged in the overhaul, modification and/or assessment of explosion-protected equipment; enterprises and personnel engaged in the inspection of explosion-protection installations; manufacturers of explosion-protected equipment; designated authorities and insurers hazardous area and explosion-protection principles, including: properties of combustible substances and their potential to create an explosive hazard; condition in the workplace that will lead to an explosion; the terms combustion, ignition and propagation; explosive range of substances encountered in the workplace i.e. lower explosion limit (LEL)/upper explosion limit (UEL); and explosive parameters of substances as given in tables of substance properties combustible materials, including gases, vapours (from liquids) and dusts; flash point; the difference between gases and vapours; and the toxic nature of gases and vapours and potential harmful consequences the nature of hazardous areas: the standard definition of a hazardous area; the recommended methods for classifying the type and degree of explosion hazard in an area; hazardous area classifications as defined by standards; and factors that are considered when a hazardous area is classified the basics of how explosion-protection is achieved by the methods of exclusion, containment, energy limitation, dilution and avoidance of ignition source explosion-protected techniques and principles, including: the principles of each explosion-protection technique, the methods used and how each technique works how explosion-protected equipment is identified by the Ex symbol marked on the equipment, including old equipment and equipment certified in another country visible conditions or actions that would void the explosion-protection provided by a particular technique flameproof (Ex 'd') explosion-protection technique, including: the purpose and characteristics of the design features of apparatus and circuits protected by the Ex 'd' technique (flame paths, integrity under pressure, pressure piling and enclosure entries) typical situations where the Ex 'd' explosion-protection technique is used actions or conditions that would void the protection provided by the Ex 'd' technique the use of standards in determining the requirements to which the installation of Ex 'd' explosion-protected apparatus shall comply increased safety (Ex 'e') explosion-protection technique, including: the purpose and characteristics of the design features of apparatus and circuits protected by the Ex 'e' technique (temperature rise, maximum power dissipation, protection devices, certified components, creepage and clearance distances, absence of sparking contacts and enclosure entries) typical situations where the Ex 'e' explosion-protection technique is used actions or conditions that would void the protection provided by the Ex 'e' technique the use of standards in determining the requirements to which the installation of Ex 'e' explosion-protected apparatus shall comply intrinsic safety (Ex 'i') explosion-protection technique, including: the purpose and characteristics of the design features of apparatus and circuits protected by the Ex 'i' technique (field devices, cables, safe area devices, earthing, entity versus integrated system concept, simple devices and interface devices and their parameters, segregation, infallible components, current and voltage limiting, creepage and clearance distances) typical situations where the Ex 'i' explosion-protection technique is used actions or conditions that would void the protection provided by the Ex 'i' technique the use of standards in determining the requirements to which the installation of Ex 'i' explosion-protected apparatus shall comply common characteristics of explosion-protection techniques, including: the purposes of temperature classification and gas grouping/apparatus grouping compliance plate markings limitations of non-metallic or specific alloy enclosures the purpose of conformity and certification/approval for equipment used in hazardous areas environmental conditions that may impact on explosion-protection techniques features and purpose of conduit seals and cable termination devices designed for use in hazardous areas (conduit seals and barrier and compression glands for cables with or without armouring, screening and/or drain wires) hazardous areas cable termination devices and applications, including: explosion-protection features of cable terminations devices selecting compliant cable termination devices hazardous areas cable termination techniques, including: installing conduit systems, where applicable, including seals to meet hazardous areas requirements (gases only) terminating a cable with a barrier gland (gases only) terminating a multipair, steel wire armoured (SWA), overall screened and individual screened cable into an enclosure testing termination/connections of installed cables/circuits enterprise reporting and recording system, including: purpose and extent of maintaining work activities records in an enterprise types of records for maintaining work activities in an enterprise methods for recording and maintaining work records work records for regulation requirements producing enterprise records and documents for the safe reconnection/commissioning of a component to the supply disconnect and reconnect explosion-protected electrical equipment, including: common characteristics of explosion-protection techniques explosion-protected techniques and principles Ex ‘d’ explosion-protection technique hazardous area and explosion protection principles hazardous areas cable termination devices and applications hazardous areas cable termination techniques Ex ‘e’ explosion-protection technique relevant job safety assessments or risk mitigation processes, including working in hazardous areas and precautions to reduce the likelihood of electrical equipment causing an ignition relevant manufacturer specifications relevant relationships in an electrical circuit relevant testing equipment relevant WHS/OHS legislated requirements relevant workplace documentation, including purpose and extent of maintaining work activities records relevant workplace policies and procedures. |