NEMA 4X rated exit signs are ideal
for use in hostile environments where dirt, dust, oil, water or corrosive
elements such as salt, acids and alkalines are present. Units are built into
a NEMA enclosure that is weather and corrosion resistant.
Enclosures include
a uniformly illuminated polycarbonate face and a rugged fiberglass housing
with a special one-way venting system.AX -AC OnlyBX –Battery Backup