Concept explainers
a.
Mention the name of the branch circuit that is connected to the dishwasher.
a.
Answer to Problem 1R
The dishwasher is connected to
Explanation of Solution
Discussion:
A dishwasher is a machine used for automatic cleaning of dishware and cutlery. It consists of a motor, an electric heating element, and a small fan that is used to circulate hot air during the drying cycle.
A 120 volts, 20 ampere rated dishwasher is connected to B5 branch circuit that originates in Panelboard B.
Conclusion:
Thus, the dishwasher is connected to
b.
Mention the size of the wire utilized to connect the dishwasher.
b.
Answer to Problem 1R
The size of the wire utilized to connect the food waste disposer is
Explanation of Solution
Discussion:
A THHN type 12 AWG-sized copper conductors are used to connect the dishwasher to the branch circuit. Any one of the wiring methods among nonmetallic-sheathed cable, EMT, or Type MC cable will be used depending upon the requirement.
Conclusion:
Thus, the size of the wire utilized to connect the dishwasher is
c.
Explain whether the branch circuit of dishwasher is required to be provided with AFCI protection or not.
c.
Answer to Problem 1R
Yes, the branch circuit of dishwasher is required to be provided with AFCI protection.
Explanation of Solution
Discussion:
As defined in NEC 210.8(D), AFCI protection is required to be provide for the branch circuit of dishwasher.
Conclusion:
Yes, the branch circuit of dishwasher is required to be provide with AFCI protection.
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Chapter 21 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_forwardHow many lighting branch circuits are provided in this dwelling? __________ a. What is the minimum load allowance for small-appliance circuits for dwellings? See NEC 220.52(A). __________ b. An individual 15-ampere branch circuit is run to the receptacle outlet behind the refrigerator instead of connecting it to one of the two 20-ampere small-appliance branch circuits that are required in kitchens. For this separate circuit, an additional 1500 volt-amperes (shall) (does not have to) be added to the load calculations for dwellings. (Circle the correct answer.)arrow_forwardThe NEC requires that a ____________ means be provided for standby power systems. In the case of portable gen sets, this might be as simple as pulling out the plug on the extension cord that is plugged into the receptacle on the gen set. For permanently installed standby power generators, this might be on the gen set and/or separately provided inside or outside of the home.arrow_forward
- a. What circuit supplies the workshop lighting? ________________ b. What circuit supplies the plug-in strip over the workbench? ________________ c. What circuit supplies the freezer receptacle? ________________arrow_forwardIn order to wire a post light, a homeowner purchased some single-conductor cable that was marked as suitable for direct burial in the ground. A separate equipment grounding conductor to the post light was not carried. Instead, the bottom of the metal post, buried 2 ft (0.6 m) into the ground, was used as a ground for the post light. The inspector red tagged (turned down) the installation. Who is rightthe homeowner or the electrical inspector? Explain. ___________________ ___________________ ___________________arrow_forwardPlease draw the wiring diagram.arrow_forward
- When used as service equipment, a panelboard (load center) must be ______________________ that is suitable for use as service equipment, 230.66. If the panelboard (load center) contains the main service disconnect, it must be clearly marked ____________________________________, 230.70(B).arrow_forwardThe recessed fluorescent luminaires installed in the ceiling of the recreation room of this residence are connected with trade size flexible metal conduit. These flexible connections are commonly referred to as fixture whips. Does the flexible metal conduit provide adequate grounding for the luminaires, or must a separate equipment grounding conductor be installed? ________________arrow_forwardWhich of the following installations for a kitchen waste disposal that operates on a 15-ampere, 120-volt branch circuit requires AFCI protection? (Circle the correct answer.) a. The disposal operates by a switch that is installed above the kitchen counter. b. The disposal operates by a switch that is installed under the counter next to the disposal. c. Both (a) and (b) d. Neither (a) nor (b).arrow_forward
- What color are the faceplates in the bathrooms? Refer to the specifications. ________________arrow_forwardList the basic concepts involved in house wiring?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_forward
- EBK ELECTRICAL WIRING RESIDENTIALElectrical EngineeringISBN:9781337516549Author:SimmonsPublisher:CENGAGE LEARNING - CONSIGNMENT