Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Chapter 9, Problem 21R
To determine
Explain how the outlet box is marked for installation to support the ceiling fan.
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Q2- What are the parameters and loss that can be determined during open-circuit test of
singlephase transformer. Draw the circuit diagram of open-circuit test and explain how can you
calculate the Parameters and loss.
Q6- the open circuit and short circuit tests on a 10 KVA, 125/250 v, 50 Hz single phase transformer
gave the following results: O.C. Test: 125 V,0.6 A, 50 W ( on L.V.) S.C. Test: 20 V, 40 A, 177.78 W (on
H.V. side) Calculate: i) Copper losses on half load ii) Full load efficiency at 0.8 leading p.f. iii) Half load
efficiency at 0.8 leading p.f. iv) Regulation at full load at 0.9 leading p.f. Ans: 44.445 W, 97.23%,
97.69%, -1.8015%
Q3-A two-winding transformer has a primary winding with 208 turns and a secondary winding with 6
turns. The primary winding is connected to a 4160V system. What is the secondary voltage at no
load? What is the current in the primary winding with a 50-amp load connected to the secondary
winding? What is the apparent power flowing in the primary and secondary circuits? Ans. 120 V,
1.44 A, 6000 VA
Chapter 9 Solutions
Electrical Wiring Residential
Ch. 9 - What circuit supplies the Master Bedroom?Ch. 9 - What unique type of electrical protection is...Ch. 9 - Prob. 4RCh. 9 - Prob. 5RCh. 9 - Prob. 6RCh. 9 - What is the estimated load in volt-amperes for the...Ch. 9 - Prob. 8RCh. 9 - How many conductors enter the ceiling fan/light...Ch. 9 - What type and size of box may be used for the...Ch. 9 - Prob. 11R
Ch. 9 - a. Does the circuit for the Master Bedroom have a...Ch. 9 - Approximately how many feet (meters) of 2-wire...Ch. 9 - If the cable is laid in notches in the corner...Ch. 9 - Prob. 15RCh. 9 - Prob. 16RCh. 9 - Prob. 17RCh. 9 - Prob. 18RCh. 9 - Prob. 19RCh. 9 - Show your calculations of how to select a proper...Ch. 9 - Prob. 21RCh. 9 - The following is a layout of the lighting circuit...Ch. 9 - Prob. 23RCh. 9 - Prob. 24RCh. 9 - May a standard electronic dimmer be used to...Ch. 9 - Prob. 26R
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- Q4- A single phase transformer has 350 primary and secondary 1050 turns. The primary is connected to 400 V,50 Hz a.c. supply. If the net cross sectional area of core is 50 cm2, calculate i) The maximum value of the flux density in the core. ii) The induced e.m.f in the secondary winding. Ans: 1.029 T, 1200Varrow_forwardpower systems engineeringarrow_forwardpower systemsarrow_forward
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