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"Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
The equipment has been constructed, tested and certified that, under prescribed conditions and appropriate levels of exposure to potentially explosive atmoshpheres, it does not contribute to explosions. The standards vary across the globe; there is a pan-European standard, for example, and a pan-North-American standard.
Asking the question suggests a lack of training, and the selection, installation and maintenance of hazardous area electrical equipment is not something for the untrained. So, stop work on the project, defer the project work to someone who has received the training, and only resume work on it once the training has been completed; local supervision will be able to arrange this on the basis that there are others at the facility that will have had suitable training.
Do find a way of typing the word Australia without using Caps Lock along the way.
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"Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Other hazardous area standards (such as ATEX, another common European hazardous area equipment standard) are not accepted in Australia.
If IECEx certified equipment is specified (and no allowance is provided to offer alternatively-certified equipment) you need to supply IECEx certified equipment (which is common).
You cannot (for example) supply industrial UL-only certified equipment as UL (and many other certification standards) are NOT suitable for hazardous areas.
More information can be found in the applicable IECEx standards and equipment certificates.
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