2005 Mastering the NEC - Basic Electrical AC Calculation VHS # 2
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:
AC vs. DC, Single Phase & Three Phase Power, Single phase 120/240 Volt Power Systems, 3 Phase Systems: 480 & 480/277 Volt Grounded & Ungrounded; 240/120 Volt, 3-Phase Delta & 208/120 Volt, 3-Phase Wye. 3-Phase Power Calculations, Voltage Drop, Power Factor, Motor Efficiency, Single Phase Transformers, 3-Phase Transformers, Single Phase Neutral Current Hazards, 3-Phase Wye Systems, Harmonics.