Concept explainers
a.
Whether is it necessary to add air-conditioner load and electric heating load to obtain the combined load on the system.
a.
Answer to Problem 1R
No, it is not necessary to add air-conditioner load and electric heating load to obtain the combined load on the system.
Explanation of Solution
Description:
From NEC 220.60, it is not necessary to add air-conditioner load and electric heating load to obtain the combined load on the system.
Conclusion:
No, it is not necessary to add air-conditioner load and electric heating load to obtain the combined load on the system.
b.
Explain the reason why it is not necessary to add air-conditioner load and electric heating load to obtain the combined load on the system.
b.
Explanation of Solution
Description:
The National Electrical Code (NEC) is the basic standard code and it sets the standards for
From NEC 220.60, the noncoincident loads such as electric heating and air-conditioner are not operated at the same time. Therefore, when calculating the feeder value that is used to supply both the loads, the larger value of loads can be considered.
Therefore, it is not necessary to add air-conditioner load and electric heating load to obtain the combined load on the system.
Conclusion:
Thus, the reason why it is not necessary to add air-conditioner load and electric heating load to obtain the combined load on the system is explained.
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Chapter 23 Solutions
EBK ELECTRICAL WIRING RESIDENTIAL
- A residential air-conditioning unit is installed in the attic. a. Is a lighting outlet required? __________ b. What Code section applies? __________ c. If a lighting outlet is required, how shall it be controlled? __________ d. What Code section applies? __________ e. Is a receptacle outlet required? __________ f. What Code section applies? __________arrow_forwardRefer to the specifications in the back of this text following Chapter 33. a. What electrical codes must be conformed to? ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ b. What is the wiring method to be used in the workshop? ________________________________________________________________________ c. What size conductors are to be used for the lighting branch circuits? ______________________ AWG the small-appliance branch circuits? ______________________ AWG d. What section of the specifications tells us the size of the service entrance to be installed for this residence?arrow_forwarda. The Code requires a minimum of two small-appliance circuits in a kitchen. Is it permitted to connect a receptacle in a dining room to one of the kitchen small-appliance circuits? _______________ What Code section applies to this situation? _______________ b. Are outdoor weatherproof receptacles permitted to be connected to a 20-ampere small-appliance circuit? _______________ c. Receptacles located above the countertops in the kitchen must be supplied by at least _______________ 20-ampere small-appliance circuits.arrow_forward
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- An eighteen-unit multifamily dwelling contains the following appliances in each unit : a 1-kVA, 115-volt dishwasher, a 1/3 hp, 115-volt in-sink waste disposer and a 4500-watt, 230 volt water heater. Using the standard method, what is the service neutral load contribution, in volt-amperes , for these appliances ? ( Assume water heater watt rating equivalent to volt-ampere )arrow_forwardThe following is a layout of the lighting circuit for the Laundry, Powder Room, Rear Entry Hall, and Attic. Complete the wiring diagram using colored pens or pencils to indicate conductor insulation color. The GFCI receptacle in the Powder Room is not shown in the diagram because it is connected to a separate circuit, B21.arrow_forwardFor a single, nonmotor-operated electrical appliance rated greater than 13.3 amperes that has no marking that would indicate the size of branch-circuit overcurrent device, what percentage of the nameplate rating is used to determine the maximum size branch-circuit overcurrent device? _________________arrow_forward
- EBK ELECTRICAL WIRING RESIDENTIALElectrical EngineeringISBN:9781337516549Author:SimmonsPublisher:CENGAGE LEARNING - CONSIGNMENT