If two rules in the National Electrical Code® are in conflict, which one wins out as right? How is this massive book organized? The key to these questions are just a few pages at the outset in Article 90. Understanding it unlocks the structure of the NEC®.

This podcast is a summary of lectures that I give for Electrical Continuing Education based in Spokane WA, USA. If you would like the lecture notes for the podcasts, visit our website at www.inw-training.com and select Podcast in the menu items.
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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
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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/