This Standard sets out requirements for the repair and overhaul of electrical equipment used in hazardous areas; these hazardous areas are defined in AS/NZS60079.10 for gases and in AS/NZS61241.10 for dusts. The Standard covers equipment having a group designation of GroupI for coal mining and GroupII for all other industries where flammable gases and vapours may be present. It also includes equipment used in the presence of combustible dusts. This Standard does not cover maintenance of explosion-protected electrical equipment; however where maintenance affects the explosion-protection properties of the equipment, the requirements of this Standard for assessment, procedure and recording of data shall be met. This Standard details the methods of overhaul, examination and the testing required to ensure safety and compliance with the relevant equipment Standards for the different types of explosion-protection. It covers the several types of explosion-protection techniques currently in use and specifies requirements for repair and overhaul service facilities.This Standard also deals with modifications where they form part of an overhaul or repair process.In all cases, the basic requirement for repair and overhaul is that such work comply with the relevant Standard for each type of explosion-protection. These Standards may be supplemented by specific requirements issued by a regulatory authority. Users of this Standard should check on the current status of such regulations and the conditions applying within the certification documents.Guidelines are also laid down for practices to be adopted by the recognized service facility to carry out work effectively, to the satisfaction of both the user and the regulatory authorities.Attention is drawn to the various occupational health and safety Acts, and regulations under these Acts.The requirements may vary between the various Australian States as well as New Zealand but are nonetheless binding on equipment suppliers and users.