http://www.state.nj.us/lps/ca/nonmedical/electrical.htm
Look at the link towards the bottom about the Application for Telecommunications Wiring Exemption it is the start of requiring licenses, it doesn't say anything about a test, but who knows they might ask for an interview. It doesn't sound too difficult to get the exemption.

[This message has been edited by mkoloj (edited 01-28-2005).]