It takes 293 Kilo-Joules of energy to bring a certain amount of cold water to boil. If the water heater is rated 220 volts and in the process of heating is drawing 5 amperes, how long will it take for the water to boil?
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- What is the calculated load when fixed electric heating is used in a residence? (220.51)When a stove element takes 15 A when connected to a 120 volt line. How long does it take to consume 30 kJThe branch-circuit load for a counter-mounted cooking unit supplied from a single branch circuit shall be calculated by adding ____ of the nameplate rating. Select one: a. 50 percent b. 80 percent c. 100 percent d. 125 percent
- in short Explain any two protective devices in the substation? plz: If you increase the EMF of the used power supply , what will happen to the time constant & the maximum current passing in the circuit ?A 20 HP motor load takes 80 amperes over a feeder line with 0.05-ohm resistance per conductor. If the bus bar voltage is 220 volts, calculate the over-all efficiency in percentage
- The dwelling has a floor area of 142 sq. m. It has a typical household appliance including one 8 kW electric range, one 1 Hp room air-conditioning unit, one 3 Hp room air-conditioning unit and one 1 Hp water pump. (Draw the diagram) Determine the following: Total Load:A) Service Entrance ConductorsB) Service EquipmentC) Other LoadDetermine the power delivered or power absorbed by the voltage source VA. IA=63 Amperes, IB=34 Amperes , and VA=38 Volts.Assume that you were tasked to install a microwave oven using 12 AWG copper. When you look at the spec plate for the oven, you discover that the oven is rated for 240V, 60HZ, and takes a current of 25A. The location for the oven is 785.7 Ft, away from the breaker panel. Calculate the expected VD if any. Assume temperature to be 75 ̊ C what is the answer? VD?
- 2 KW hairdryer is connected to the 230 v . Calculate the current through the hairdryer. (ii) Suppose you have a range of fuses 1A, 2A, 6A, 10A , 12 A. Which fuse is most appropriate for the hairdryer?The motor delivers 13HP at an efficiency of 82%, the voltage at the terminals of the motor is 218 volts. Determine the system-overall efficiency (percentage) if each feeder conductor resistance of 0.055. Round off your answer up to 2 decimal places.Calculate the minimum copper conductor size needed for 120/240 V electric range branch circuit the electric range has a nameplate rating of 12 KW?