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Activity 5.1 1. On a 120/208-v four wire Y system, two lamps are connected from phase A to neutral, 5 lamps from phase B to neutral and four lamps from phase C to neutral. If the lamps have the same rating and each draws 2 A, find the current in the neutral wire. a. O A b. 8.66 A c. 6.93 A d. 5.29 A Two balanced three-phase loads are connected in parallel

Activity 5.1 1. On a 120/208-v four wire Y system, two lamps are connected from phase A to neutral, 5 lamps from phase B to neutral and four lamps from phase C to neutral. If the lamps have the same rating and each draws 2 A, find the current in the neutral wire. a. O A b. 8.66 A c. 6.93 A d. 5.29 A Two balanced three-phase loads are connected in parallel

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Activity 5.1 1. On a 120/208-V four wire Y system, two lamps are connected from phase A to neutral, 5 lamps from phase B to neutral and four lamps from phase C to neutral. If the lamps have the same rating and each draws 2 A, find the current in the neutral wire. a. O A b. 8.66 A c. 6.93 A d. 5.29 A 2. Two balanced three-phase loads are connected in parallel. Load 1 draws 20 kW at a lagging power factor of 0.85; Load 2 draws 25 KW at a lagging power factor of 0.5. The line voltage at the terminals at the load is 440 V. The load terminals are connected to the source terminals by means of cables which have an impedance of 1 + j3 ohms each. Calculate the line voltage at the terminals of the source. a. 795 V b. 805 V c. 778 V d. 788 V 3. A three-phase, 339.4 has a delta connected load with Zan = 10/10°, Znc - 10/30° AND A ZCA - 15/-30° ohms. Find the current in line A. a. 49.23 A b. 64.18 A c. 23.83 A d. 54.72 A
Transcribed Image Text:Activity 5.1 1. On a 120/208-V four wire Y system, two lamps are connected from phase A to neutral, 5 lamps from phase B to neutral and four lamps from phase C to neutral. If the lamps have the same rating and each draws 2 A, find the current in the neutral wire. a. O A b. 8.66 A c. 6.93 A d. 5.29 A 2. Two balanced three-phase loads are connected in parallel. Load 1 draws 20 kW at a lagging power factor of 0.85; Load 2 draws 25 KW at a lagging power factor of 0.5. The line voltage at the terminals at the load is 440 V. The load terminals are connected to the source terminals by means of cables which have an impedance of 1 + j3 ohms each. Calculate the line voltage at the terminals of the source. a. 795 V b. 805 V c. 778 V d. 788 V 3. A three-phase, 339.4 has a delta connected load with Zan = 10/10°, Znc - 10/30° AND A ZCA - 15/-30° ohms. Find the current in line A. a. 49.23 A b. 64.18 A c. 23.83 A d. 54.72 A
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