a terminal box so designed that all the products of an electrical breakdown within the box are relieved through a pressure relief diaphragm NOTE - The qualifying term 'pressure relief' may be applied to terminal enclosures other than terminal boxes. Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=411-41-31
a terminal box so designed that all the products of an electrical breakdown within the box are relieved through a pressure relief diaphragm NOTE - The qualifying term 'pressure relief' may be applied to terminal enclosures other than terminal boxes.