So, you got your new code book. What now? Introduction to the NEC® and tips on marking and Tabbing as well as a bit of context and history that brought us the National Electrical Code® .
Code book information: Free Online Access at NFPA.ORG
Mike Holt's Code Adoption list is found Here
History of Underwriter's Laboratories can be found Here
intro and outro sound effects:
Charging Power by Javier Zumer https://freesound.org/s/257229/
Jace Atkins by rescuedsheep https://freesound.org/s/346125/
Metal Door by avakas https://freesound.org/s/172364/