17 x 14 x 9 inch SolaHD™ Automation transformers non ventilated 50 VA to 45 kVA. encapsulated transformers rated for use in hazardous locations as well as harsh industrial environments. Encapsulation and rugged NEMA 3R enclosures protect the transformer from dust and moisture while providing extra shock and vibration resistance. UL Listed transformers fully comply with the latest edition of the National Electrical Code for Class I, Division 2, Group A-D locations when installed in compliance with NEC 501.100(B). Copper lead wire terminations. Conduit knockouts for side entry into wiring compartment. UL Listed/NEMA Type 3R enclosure for indoor and outdoor service. Single phase, non encapsulated, 0.05 to 0.25 kVA: Low temperature rise, UL Class 130 °C insulation system, 80 °C temperature rise under full load. Single Phase, encapsulated, 0.5 to 25 kVA and Three Phase, encapsulated, 3 to 45 kVA.: Electrostatically shielded for quality power on sizes 1 kVA and larger. UL Class 200 °C insulation system, 115 °C temperature rise under full load. 0.5 to 45 kVA units are encapsulated with electrical grade silica and epoxy for industrial applications.