Determine the size of the service-entrance conductors required for twenty (20) 900 sq.ft units in a multi-family dwelling. The units have the following loads: Ø General lighting and receptacle loads. Ø Two small kitchen appliance loads and one laundry load per unit. Ø Special appliance loads. Each unit has: 10-kVA space heating unit; 12-kVA range; 5-kVA water heater; 1.2-kVA dishwasher; and 1-kVA disposal. Use both the standard and the optional methods to determine the service-entrance conductor size for the phases. Assume 240-volt service.

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Electrical Heating Unit

The conversion of electrical energy to heat energy is known as electric heating. The heating system that converts the electrical energy to heat energy for various application is called electrical heating unit. Electricity is employed as the firing mechanism in electric heating systems, which transforms electric current to heat. Electric heaters have heating elements in the form of electric resistors.