shall be calculated based on the ampere rating of the appliance or load served. In other articles applying to the calculation of loads in specialized. In the current course' EE-3: Basic Electrical design course – Level II ', in Sixteen Articles, I explained the design of the Dwelling type buildings I explained Where and how to distribute each type of load in a dwelling unit as per NEC code and how to calculate its Demand load for feeder and service sizing calculations, and finally I summarize the steps of calculating electrical load for any dwelling unit as per NEC standard & Optional Calculation methods in two Excel sheets/calculator. Figure 220.1 Branch-Circuit, Feeder, and Service Load Calculation Methods. In course ' EE-1: Beginners' Electrical design course ' which is a preparation for beginners in electrical design, I explained the Electrical design philosophy for all building types and indicated the different types of buildings according to usage which were: