AS NZS 60079.30.1:2016 pdf free

AS NZS 60079.30.1:2016 pdf free.Explosive atmospheres
Trace heaters shall be provided with an evenly-distributed electrically conductive covering that shall cover at least 70 % of the surface. Trace heater pads and panels shall be constructed such that the electrically conductive covering shall be opposite the surface to be heated. The electrically conductive covering shall either be suitable for use in the particular atmosphere(s) or have a suitable non-metallic overjacket over the covering. The manufacturer shall declare the maximum withstand temperature in degrees Celsius. The materials used in the trace heater and integral components shall withstand a temperature of no less than the manufacturer’s declared maximum withstand temperature +20 K, when tested in accordance with 5.1.11. The manufacturer shall provide documentation of the specification of non-metallic materials on which the mechanical strength and the electrical insulation depend (between the heater and other conductive parts) which shall include identification of the material type.
Trace heaters may be supplied with additional mechanical protection to meet the requirements of this standard if they are supplied as an integral assembly (prefabricated), and contain the following statement in the instructions: “This mechanical covering shall not be removed and the trace heaters shall not be operated without the mechanical covering being in place”. In this case the tests in 5.1.5 and 5.1.6 shall be performed with the additional mechanical protection installed on the trace heater.
Electrical connectors supplied with integral components shall be certified for the current-carrying capacity of the trace heating conductors declared by the manufacturer and shall meet the other prescribed testing in this standard.
Electrical resistance trace heater terminations identified as separate components shall comply with the requirements of one or more of the types of protection listed in IEC 60079-0 suitable for the application, which may be supplemented and modified by the requirements of this standard. See also Table 1.AS NZS 60079.30.1 pdf free download.