18. It's critical to ground-fault protection of equipment system functionality that the _______ be completely isolated from any grounding connections downstream from the service. A. site-isolating device B. overcurrent device C. grounded (neutral) conductor D. ground-fault circuit interrupter

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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.