The enclosure shall be completely weatherproof, dust-tight and rain tight. The gasket shall be one piece black neoprene or buna nitrile rubber with a (one) sealed joint. It should be either mechanically attached to the enclosure lip and in continuous contact with the latched lid or fully framed and fastened to the lid with an epoxy adhesive. Two vent plugs shall be provided to release hydrogen gas without allowing sand/ dust to enter the enclosure. Vent pipes are not acceptable. The enclosure base shall be ribbed for structural strength with two drain holes (approximately 6 mm) in each depression. Two external anchoring tabs shall be provided on each end of the enclosure for mounting on concrete footings.