I was informed by my colleague that all motors that are classified to be used in hazardous areas (eg. EEx de etc) must have its bearing changed by certified company/personnel authorised to work on such motors. This is provided under the hazardous area protection method standards. Could you notify on such standard (such as ANSI or IEC)so that i could refer to? My knowledge is that you only need to send to authorised agent if the work involve changing of the winding and motor terminal box.
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Changing Hazardous Area Classified AC motor bearing requirements
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