Appleton™ explosionproof, non-factory sealed Intraground™ N1 Series circuit breakers and enclosures provide short circuit protection and a safe disconnect means in a non-metallic design. They provide thermal time delay overload protection for branch circuits for lighting, appliance and motor circuits. The Intraground™ N1 Series is ideal for use in corrosive atmospheres, they are suitable for use in Class I, Division 1 atmospheres when properly installed with sealing fittings at all conduit entries.