We run a test stand that is rated Class I/Div I hazardous area in which we run multiple electric pumps from low voltage up to 6600v. Since we install and tear down the pump connection setup on a daily basis (hence the test stand designation), we do not have the luxury of having sealed AEx e junction boxes, but rather use typical NEMA 4X with a nitrogen purge. However, again due to the test stand nature (i.e. build/tear down daily), the purged JB's do not even use glands. We simply run the cable through the JB cutout and leave gaping holes between the box and the cable.
Question.....what are the requirements for purging typical NEAM 4X JB's for meeting class I/Div I?
Any help would be appreciated....
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