Have a look at our Electrical AutoCAD block library just added and updated for AutoCAD 2012. This is an extensive electrical symbol collection of over 2850 drawings.
The blocks comply with ANSI Y32.2 and IEC617 and also include a fluid power library which complies with ISO1219. Brief symbol descriptions are also incorporated in drop down menus for easy retrieval.
These electrical CAD blocks are designed for the professional user and are drawn to the highest standards also by well known electric engineering professionals within the industry.