Appleton® explosionproof, dust-ignitionproof, watertight, ALPN Series distribution panelboards are used to provide protection and control of electrical equipment in hazardous locations. These non-factory sealed panelboards are designed to centrally control switching systems for multiple branch circuits that are used for lighting, heat trace, small motors and other electrical equipment. ALPN, AGPN and APPN Series panelboards are suitable for use in damp, wet, corrosive and hazardous locations, including chemical and petrochemical plants, petroleum refineries, other process facilities and industrial applications.