You can follow these instructions from the Help (Symbol Libraries > Managing Library Symbols > How to install additional symbol libraries).
How to install additional symbol libraries
During installation, you specified which symbol libraries to install. You can install additional symbol libraries later.
You probably will also want to change some of your project default settings. You can find information on this in the Help at Advanced Productivity > Configure projects for various drawing standards.
Hope this helps.
I went to add/remove programs and all the libraries were checked but everything was grayed out. I could not click on them to change. Does that mean they are installed? How to I switch from IEC to ANSI within AutoCad Eletrical 2010.
If they are disabled it means they were installed. If they are missing then you can repair your install.
Once they are installed then you need to direct the project to use that library. This is a per project setting.
1. In Project Manager, right-click on the project name and select Properties.
2. On the Project Settings tab expand the Schematic Libraries section.
3. Add and Remove library paths as needed. AutoCAD Electrical searches in the order shown to find a symbol when you select it to insert.
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