Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Chapter 22.3, Problem 8R
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QUESTION 3
We are running 3 wires and a ground in a RMC to a control panel with a 60 amp circuit breaker disconnect in the control panel. The conduit is run along the ceiling where the ambient air temperature is 100 degrees. The control panel feeds our secondary cooling pump. What size are the ungrounded conductors? All conductors have typeTHHN insulation.
8. Connect the Electronic VOM, set to the ammeter function on the 15mAdc range,between points A and D.9. Close switch S1. Measure current IAB.
IAB = 19.5 mAdc
10. Measure current IAD flowing through resistor R1.
IAD = 14.8 mAdcAre currents IAB and IAD entering or leaving point A? __________
Is the sum of currents IAB and IAD equal to total current IT? __________Is the current IAB entering or leaving a junction point B? __________
A feeder is installed to feed a sub panel. The feeder starts at a 400-amp breaker, utilizing (2) parallel
4/0 THWN-2 copper conductors in the same conduit. What size is the copper equipment grounding
conductor required to be?
OA. Parallel (2) #1/0
B. #3
OC. #1/0
OD. Parallel (2) #4/0
Chapter 22 Solutions
Electrical Wiring Residential
Ch. 22.1 - Prob. 1RCh. 22.1 - Prob. 2RCh. 22.1 - Prob. 3RCh. 22.1 - Prob. 4RCh. 22.1 - Prob. 5RCh. 22.1 - Prob. 6RCh. 22.1 - Prob. 7RCh. 22.1 - Prob. 8RCh. 22.1 - Prob. 9RCh. 22.1 - Prob. 10R
Ch. 22.1 - Prob. 11RCh. 22.1 - Prob. 12RCh. 22.2 - Prob. 1RCh. 22.2 - Prob. 2RCh. 22.2 - Prob. 3RCh. 22.2 - Prob. 4RCh. 22.2 - Prob. 5RCh. 22.2 - Prob. 6RCh. 22.2 - Prob. 7RCh. 22.2 - Prob. 8RCh. 22.2 - Prob. 9RCh. 22.2 - Prob. 10RCh. 22.2 - Prob. 11RCh. 22.2 - Prob. 12RCh. 22.3 - Prob. 1RCh. 22.3 - Which of the following statements Meets Code?...Ch. 22.3 - Prob. 3RCh. 22.3 - Prob. 4RCh. 22.3 - Prob. 5RCh. 22.3 - Prob. 6RCh. 22.3 - Prob. 7RCh. 22.3 - Prob. 8R
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