I am not sure there is any code that specifies at what stage of construction you have to install wiring.
Actually there is....
IRC109.1.2 Rough inspection of plumbing, mechanical, gas and electrical systems shall be made prior to covering or concealment, before fixtures or appliances are set or installed, and prior to framing inspection.
Edited for typo's
[This message has been edited by Ryan_J (edited 04-18-2004).]