Delmar's Standard Textbook Of Electricity
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 8, Problem 4PA

The hot water for the heating system for a small factory is supplied by a single boiler. The bolier is locatd in a small building separate form the factory. The power supplied to the bioler is 240-volt single-phase without a netural conductor. At the present time, the small building housing the bioler has no inside lighting. The business owner desires that four 100-watt lamps be installed inside the building. All lamps are to be connected to a single switch. The lamps are to be connected to the present 240-volt sercvice inside the building. How would you accomplish this task? Explain your answer.

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III. Problem Solving. Compute up to FOUR decimal places. BOX your final answers (with units). 1. What is the equation of the waveform in figure 1? 2. A coil takes 15A from a 250V source. When a 20 Ohm resistor is connected across the coil. The combination draws a total current of 25A. Determine the resistance and inductive reactance of the coil. 3. In the single-phase power system in figure 2, determine the voltage, Vab, and current, I b, being received by the load, 10 +j15 N. V, volts 10 ms AV 100 V Figure 1 250 V 0, deg t, msec CS Scanned with CamScanner j8n 120280°V 12 j3N 252 M €150 121 j45 1 1.250 /150 2.5.2 b Figure 2 j6n j12A
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