Drilling and tapping holes in explosion-proof distribution boxes
From a technical point of view, it is feasible to drill holes in the explosion-proof box. The main function of the explosion-proof distribution box is to ensure the normal operation of electrical equipment in flammable and explosive environments and to prevent explosion accidents caused by electrical sparks. Custom Drilling and tapping in Nema 7/9 explosion proof enclosures is not a task that should be left up to just any machine shop or done in the field with hand tools. Always check to see if the shop has a hazardous location UL NNY certificate and is familiar with the specific UL code for drilling. If you want conduit entries drilled to your specifications you have two choices: Order them from the factory and wait 6 to 12 weeks, or drop them off at ACES where they'll be ready in. duit openings meets the specifications of Chart 1, and minimum wall thickness meets t ime en determined for specific enclosu s, measure the wall thickness and refe to ) t ade size is the minimum allowable size f SION 1 & CLAS nt THE BOX IS N T SUPPORTED BY THE CONDUITS require a wall thickness.
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