This Standard specifies safe working practices to be adopted by personnel directly concerned with the operation or maintenance of commercial electronic equipment, radio communications equipment and associated electrical equipment.This Standard applies generally to all types of commercial electronic equipment, radiocommunication equipment and equipment employing similar techniques e.g. radio and television transmitters, 400 Hz aircraft equipment, power tools, electric welders, electrotherapy equipment, switch mode power supplies, radiofrequency heating equipment, etc ...This Standard excludes equipment operating at Telecom network voltages (TNV) for which reference to Austel and Telecom regulations should be made.Application The purpose of this Standard is to provide a general basis for drafting specific safety procedures to ensure that personnel working on electronic equipment are not exposed to danger. The general practices, as listed, shall form the basis for the preparation of more specific instructions. Where they exist, specific safety standards on particular items or types of equipment, or particular safety regulations of the relevant authority, will override the requirements of these practices. State regulations may contain additional requirements.