Concept explainers
A post light has a 120-volt, 60-watt lamp installed. The lamp has an expected lamp life of 1000 hours. The homeowner installed a dimmer ahead of the post light and leaves the dimmer set so the output voltage is 100 volts. The lamp burns slightly dimmer when operated at 100 volts, but this is not a problem. What is the expected lamp life when operated at 100 volts?____________________
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- Refer 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_forwardComplete the wiring diagram for the dimmer and lamp.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
- For laundry equipment in basements, what sort of electrical circuitry is required by the Code? ________________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_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 right—the homeowner or the electrical inspector? Explain.arrow_forward
- The Code places a maximum open-circuit voltage on lighting equipment in or on homes. This maximum voltage is (600) (750) (1000). (Circle the correct answer.) Where in the NEC is this voltage maximum referenced? _______________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_forwardGive me about ten examples of electrical code violations in maintenance and repair. Hopefully the explanation is detailed and better if there is a picture with references.arrow_forward
- what wire size is needed on a one 20 amp, 120-volt laundry branch circuit? what wire size is needed on a one 20 amp, 120-volt garbage disposal circuit?arrow_forwardWhen the nameplate on an air-conditioning unit states Maximum Size Fuse or HACR Circuit Breaker, what type of circuit breaker must be used? ___________________ ____________________________________________________________________arrow_forwardCan two 25,000-Btu room air conditioners be wired into the same electricalcircuit protected by a 25-ampere fuse? Each air conditioner is rated at 3,050watts for a 230-volt circuit. (This rating is while the air conditioner is runningsteadily.)arrow_forward
- EBK ELECTRICAL WIRING RESIDENTIALElectrical EngineeringISBN:9781337516549Author:SimmonsPublisher:CENGAGE LEARNING - CONSIGNMENT