Is repeated grounding of the enclosure required for explosion-proof distribution boxes in chemical tank farms?
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This post was last edited by cjgj008 on 2017-2-28 at 11:09. Recently, a safety assessment was conducted in our reservoir area, and an expert suggested that the enclosures of all explosion-proof distribution boxes in that area should be grounded. The explosion-proof distribution boxes we use on site are all powered using a five-wire system, with the PE wire being grounded inside the box. I would like to ask whether there are any regulatory requirements stating that, in such cases, the explosion-proof distribution box also needs to have an additional grounding of its enclosure – what specific regulations are these?
There shouldn’t be a power distribution box, but the equipment does have certain requirements; I’m not sure whether the power distribution box is also considered part of the equipment
I don’t quite understand this standard phrase either; it seems to refer to this kind of situation.