Lighting Branch Circuit and Small-Appliance Circuits for Kitchen Chapter Twelve Lighting Branch Circuit and Small-Appliance Circuits for Kitchen

Objectives After studying this chapter, you should be able to: Understand lighting for a typical kitchen and dining room Understand the installation and operation of kitchen exhaust fans Know the NEC® requirements for small-appliance branch circuits in kitchens

Objectives (cont’d.) Know the NEC® requirements for GFCI protection for all receptacles that serve countertops in kitchens Decide if a separate branch circuit should be installed for a refrigerator

Objectives (cont’d.) Decide where it might be desirable to install multiwire branch circuits and split-circuit receptacles in areas where a high concentration of plug-in appliances might be used

Kitchen NEC® defines a kitchen as “an area with a sink and permanent provisions for food preparation and cooking” Permanent provisions are in place even though the appliance may not be permanent

Lighting Circuit B7 AFCI protection is required for the lighting branch circuit A feed-through receptacle may be used for this protection Type AFCI circuit breaker installed in the panelboard is more practical

FIGURE 12-1 Cable layout for the kitchen lighting. This is Circuit B7. © Cengage Learning 2015 3

Kitchen Lighting Prior to installing the wiring, the electrician really has to consider the wishes of the homeowner Lighting should be arranged to avoid shadows in work areas Sometimes strip fluorescent or LED luminaries are used under cabinets

Fan Outlet Ducted fans exhaust air to the outside To remove cooking odors, steam, and smoke Ductless fans remove cooking odors but do not remove steam or smoke NEC® 422.16(B)(4) permits a range hood to be cord-and-plug connected

Fan Outlet (cont’d.) NEC® defines an individual branch circuit as “a branch circuit that supplies only one utilization equipment” NEC® 210.21(B)(1) requires that a single receptacle supplied by an individual branch circuit have an ampere rating not less than the rating of the branch circuit

Clock Outlets Battery-operated wall and mantle clocks for the most part have replaced electric clocks Clock hanger receptacles Still available Set back from the front edge of the faceplate, providing room for the typical small plug cap on the end of a cord

Small-Appliance Branch Circuits for Receptacles in the Kitchen At least two 20-ampere small-appliance branch circuits are required in a kitchen The small-appliance circuits shall be assigned a load of 1500 volt-amps each Countertop receptacles must be supplied by at least two small appliance circuits

FIGURE 12-10 Cable layout for kitchen receptacles. © Cengage Learning 2015 3

Small-Appliance Branch Circuits for Receptacles in the Kitchen (cont’d All countertop receptacles must be GFCI protected Refer to NEC® 210.11(C)(1), 210.52(A), and 210.52(B) Additional small-appliance circuits may be installed as needed

Split-Wired Receptacles and Multiwire Circuits A split-wired receptacle has the top receptacle on one circuit and the bottom receptacle on a different circuit A popular use of split-wired receptacles is to control one receptacle with a switch and leave one receptacle “hot” at all times

FIGURE 12-14 Connecting the grounded neutral conductors in a 3-wire (multiwire) branch circuit, NEC 300.13(B). © Cengage Learning 2015 11

Split-Wired Receptacles and Multiwire Circuits (cont’d.) Terminals of receptacles or other wiring devices are not to serve as a splice NEC®, 300.13(B) states: “In multiwire branch circuits, the continuity of a grounded conductor shall not be dependent upon device connections …”

FIGURE 12-15 Split-wired receptacle connected to multiwire circuit. © Cengage Learning 2015 10

Receptacles and Outlets Article 100 defines a receptacle and a receptacle outlet A single receptacle connected to a circuit must have a rating not less than the rating of the circuit