AS/NZS (IEC , Ed. , MOD). Australian/New Zealand Standard. Explosive atmospheres. Part Design. You may be required to comply with this standard if you intend to undertake electrical work in areas where flammable gas or vapour risks may arise. Where. Looking for advice on AS-NZS & other AS-NZS certification standards? Contact E-x Solutions on (08) to speak to one of our experts today.
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Combustible dust can be ignited by equipment in several ways: If the total sum of the risk factors is greater than 6, then anti-condensation space heaters shall be employed, and special measures shall be applied to ensure that the enclosure does not contain an explosive gas atmosphere at the time of starting.
Australian Hazardous Area Standards – AS-NZS | E-x Solutions
Failure of the primary seal should also be annunciated e. NOTE This requirement is intended to apply a recently designed lamps where the pins or end caps may be plastic or ceramic with a conductive film coating. NOTE 1 Cables employ materials which may exhibit ‘coldflow’ characteristics. The system of designating these equipment protection levels is as follows. Electrical installations design, selection and erection lECEd 4.
The maximum surface temperature of the eqferpment apparatus when tested in the dust- free test method in Adequate earthing or bonding should be maintained; the flexible tubing should not be the sole means of earthing. Associated apparatus with galvanic isolation between the intrinsically safe and non- intrinsically safe circuits is preferred.
Painting by the user of the enclosure after complete assembly is permitted. Unless suitable precautions are taken, spare batteries shall not be taken into the hazardous area.
NOTE Low-pressure sodium lamps should not be transported through a hazardous area or in st al l e d a bov e a hazardous a r e a owing to the risk of ignition due to free sodium from a broken lamp.
AS-NZS 60079 & Other AS-NZS Standards
Combinations of metals that can lead to galvanic corrosion shall be avoided. It is recommended, therefore, that all equipment meet the requirements of the location to which the equipment will be exposed which requires the highest EPL. Where taper threads are used, the connection shall be made wrench tight.
Venl iiting” froiri;-an i: For trenches, adequate venting or sand-filling may be used. These cables are not admissible for portable electrical equipment exposed to heavy mechanical stresses, for example hand-lamps, foot-switches, barrel pumps, etc. Flameproof joints shall not be painted. This standard concerns the use of electrical apparatus in areas where flammable gas or vapour risks may arise.
AS-NZS 60079-14: Explosive atmospheres – Electrical installations design, selection and erection
The conductor insulation shall be such that it will be capable of withstanding an r. Protective measures aim to reduce, to an acceptable level, the likelihood that the electrical installation could become a source of ignition. Where practicable, measurements of all the possible combinations of the cores which can result from open-circuiting and short-circuiting the separate ends of the hzs should be made.
It shall also be substantially free from moisture, oil, dust, sa, chemicals, combustibles and other contaminating material that may be dangerous or affect the satisfactory operation and integrity of the equipment. Where protection is achieved by sensing it shall be either: Artificial ventilation for the protection of analyzer s houses I ECEl e ctrical apparatus for e xplosiv e gas atmosph e r e s P a rt The spark-over voltage of the surge protection device shall be determined by the user and an expert for the specific installation.
It cannot be too strongly emphasized that extreme care should be exercised in the selection and application of these substances to ensure the retention of the non-setting characteristics and to allow subsequent separation of the joint surfaces, NOTE 2 Non-hardening grease-bearing textile tape nnay be ennployed outside of a straight flanged joint with the following conditions: NOTE Typically communications circuits and gas detection equipment will be constructed to meet the Ma requirements, for example an Ex ia telephone circuit.
NOTE 1 Silicone based greases are often suitable for this purpose but care needs to be taken concerning use with gas detectors. It sets out requirements for the construction, design, testing, selection and marking of electrical apparatus, as well as their erection, inspection and maintenance. Cab l es shall b e: Added figures are not themselves shaded, but are identified by a shaded border.
The conduit shall be wrenchtight at all of the threaded connections. Where the equipment is fitted with more than one plug and socket for external connections and interchange could adversely affect the type of protection, such zs and sockets shall either be arranged so that interchange is not possible, e. Insulation by tape alone is not permitted.