2005 Mastering the NEC - Ampacities & Derating VHS # 6
Mastering the NEC videos can be used to train and re-train electrical staff!
There's no way you can memorize everything in the National Electrical Code. But if you understand why and what is intended, you will be better prepared to remember the details you need for every day use.
Mastering the NEC videos are designed to help electricians, designers, supervisors, contractors and maintainers understand the NEC.
Topics covered:
Ampacity Tables, Insulation Ratings, Number of Conductors, Wiring Insulation Dictionary, Ampacity Table Values & Footnotes, Ambient Temp. Corrections, Derating Factors & Examples, Derating vs. Conduit Fill, Maintaining Spaces Between Conduits, Derating & Neutrals, Ampacity vs. Overcurrent Protection, Overcurrent Protection for Recepticle vs. Lighting Circuits, 60°, 70°, 90°C Insulation Application Limitations.