Basic Electrical AC Calculation is the second DVD in the 2008 Mastering the NEC series, and is designed to help electricians, designers, supervisors, contractors and maintenance personnel understand the NEC. The subject is clearly explained by Mark Shapiro, an electrical professor who offers a thorough explanation on how you should interpret this section of the NEC on the job. This video's running time is 81 minutes.

Topics covered in the Basic Electrical AC Calculation DVD:

• Introduction, AC & 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