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This self-paced online course covers load calculation requirements in the National Electrical Code. Load calculations are the basis for the sizing of all types of circuits in the NEC, particularly circuits that supply some kind of power or lighting equipment.

Upon completion you should be able to:

• Explain the significances of Article 220 and other relevant articles.
• Explain how the Code is arranged, including where load calculations are found for branch circuits, services and feeders.
• Explain voltage requirements for load calculations.
• Explain where various branch circuit load calculation requirements can be found.
• Explain the role of demand factors.
• Distinguish between how demand factors are used for various types of equipment.
• Explain optional feeder and service load calculations for specific occupancies.

Who Will Benefit

Anyone whose job involves designing, reviewing, evaluating or installing fire protection systems, including: designers, installers, engineers, electrical contractors, technicians, project managers, fire marshals, and architects.

Course Summary

• Load calculations are the basis for determining the size of all types of circuits in the National Electrical Code, particularly those that supply power or lighting equipment.
• Article 220 is the basis for all load calculations, although related requirements or modifications are found in many other sections.
• The NEC outlines voltage requirements for load calculations and gives specific requirements for calculating load for various types of circuits.
  
• Demand factors are applied in some circumstances, when loads will be variable because equipment is not all used at the same time. The NEC describes when and how demand factors are to be applied for branch circuits, feeders, services, general lighting, motors and receptacles not in dwelling units.
• In some cases, loads for specific occupancies are calculated using different methods.