The basic purpose of a transformer is voltage transformation as near as practically possible to the load for economy and distribution of power. Typical loads for dry type distribution transformers include lighting, heating, air conditioners, fans, and machine tools. Such loads are found in commercial, institutional, industrial, and residential structures. Open core and coil assemblies are typically used by panel builders and equipment OEM customers who incorporate the entire transformer into their structures. A versatile option to purchasing a standard, enclosed transformer and discarding the unneeded enclosure parts.