I went through Leviton a long time ago, they guy came to one of our offices and did a 1 day program.
Panduit also does some courses...and I like their hardware.
http://www.panduit.com/Support/Training/index.htm
Might search through your local tech/trade schools, lots of local ones will have courses for electricians. The guy I use for most of my network cable installs happens to teach a few night courses on data cabling at a local tech school.
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