EBK MINDTAP FOR HERMAN'S DELMAR'S STAND
7th Edition
ISBN: 9781337900614
Author: Herman
Publisher: VST
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Chapter 11, Problem 11RQ
What is ionization potential?
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Answer problems 10, 11, and 12 using the following information:An addition is being planned to a school building. You have been asked to determine theload that will be added to the panelboard that will serve this addition.The addition will be a building 80 ft 3 50 ft. It will consist of four classrooms, every40 ft 3 20 ft and a corridor that is 10-ft wide
The following loads will be installed:Each classroom:12 fluorescent luminaires, 2 ft 3 4 ft @ 85 VA each20 duplex receptaclesAC unit, 208-volt, 1-phase @ 5000 VACorridor:5 fluorescent luminaires, 1 ft 3 8 ft @ 85 VA each8 duplex receptaclesExterior:4 wall-mounted luminaires @ 125 VA each4 duplex receptacles
10. The calculated load is__________ VA.11. The connected load is__________ VA.12. The neutral load is_____________ VA.
A 1200-ampere service was installed, consisting of three sets of 600 kcmil THHN/THWN copper conductors per phase. The electrical contractor was careful to cut theconductors the same length. When the utility crew made up the connections at theservice heads, they cut the conductors to different lengths to make their connectionssimpler. The actual lengths of the service-entrance conductors in a given phase ended up being20 ft (6.1 m), 22 ft (6.7 m), and 24 ft (7.3 m). The maximum ampacity of a 600-kcmilTHHN/THWN copper conductor is 420 amperes using the 75°C column of Table310.16. This is more than adequate for the calculated 1200 amperes when three conductors are run in parallel. Determine how the load of 1200 amperes would divide in each of the three paralleledconductors in a phase.
Determine the conductor sizes for a feeder to a panelboard. It is a 120/240-volt,single-phase system. The OCPD has a rating of 100 amperes. The calculated load is15,600 VA. All the loads are 120 volts.
Chapter 11 Solutions
EBK MINDTAP FOR HERMAN'S DELMAR'S STAND
Ch. 11 - 1. Conduction in a liquid depends on the movement...Ch. 11 - What is a negative ion?Ch. 11 - 3. What is a positive ion?
Ch. 11 - Name three basic substances that can be used to...Ch. 11 - What is an electrolyte?Ch. 11 - 6. What is used to hold a sulfate ion together?
Ch. 11 - What is the negative terminal of a power source...Ch. 11 - Prob. 8RQCh. 11 - What determines the thickness of the coating...Ch. 11 - What is electrolysis?
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- Calculate the neutral current in a 120/240-volt, single-phase system when the current inphase A is 20 amperes and the current in phase B is 40 amperes. The load is resistive. Calculate the neutral current in a 208Y/120-volt, 3-phase, 4-wire system when thecurrent in phase A is 0, in phase B is 40, and in phase C is 60 amperes. The load isresistivearrow_forwardCalculate the neutral current in a 208Y/120-volt, 3-phase, 4-wire system when the current in phase A is 20, in phase B is 40, and in phase C is 60 amperes. The load is resistive.arrow_forwardI need expert to solve this,if you don't know don't attempt,also show the signal flow diagramarrow_forward
- 1) A circuit is given as shown. (a) Find and label the circuit nodes. (6) Determine I, II, I₂ and V, I mm 22 +1 m 50 4 12 12v 2 ти + V ≤1652 50 mv Ми 60arrow_forwardHANDWRITTEN SOLUTION NOT USING CHATGPT PLEASEarrow_forwardDesign a full-wave rectifier power supply using a 9.52:1 transformer. Assume that the outlet is120 V rms @ 60 Hz. Further assume that the diode turn-on voltage V D(on) is 0.7 V. Pick the valueof CL such that vo has a maximum ripple of 1 V p-p . Solve for the average value of vo = Vo (notethat this may be greater than 12 V) and iD(ave) = ID.arrow_forward
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