EBK ELECTRICAL WIRING RESIDENTIAL
19th Edition
ISBN: 9781337516549
Author: Simmons
Publisher: CENGAGE LEARNING - CONSIGNMENT
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Chapter 21.1, Problem 6R
To determine
Explain the reason for installing flow switches on food waste disposers.
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45. A switch or circuit breaker can be used as both the controller and disconnecting means if
it
a. opens all ungrounded conductors as required by NEC 430.103
b. is protected by an overcurrent device in each ungrounded conductor
c. is manually operable, or both power and manually operable
d. All of these answers
Follow the procedures in troubleshooting the defects and faults of an electric fan by filling in the missing steps.Doesn't rotate 1.___________ 2.____________ Check for Open AC cord or wiring3. ___________4.___________ Defective switch/electronic system control 5. _____________Defective module (system control).
QUESTION 9
When a ground wire is connected to an interior gas piping system and the underground portion of the gas pipe into the building is plastic, which of the following is (or are) true?
a
A.This would be approved by code as the gas pipe is only being bonded to the electrical system.
b
B.This installation would be approved by code, as the gas pipe is not a grounding electrode.
c
C.Both A and B
d
D.Neither A nor B
Chapter 21 Solutions
EBK ELECTRICAL WIRING RESIDENTIAL
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- Raceway fill calculations are a prerequisite in ____ needed for particular circuits. Select one: A. MATERIAL REQUIREMENTS B. SCHEMATIC REQUIREMENTS C. DETERMINING THE SIZE OF RACEWAY D. CIRCUIT LOADSarrow_forwardFood-waste disposers include a small manual reset button to restart the motor if it overheats and goes off-line due to prolonged use, something falls into the unit and jams it, or another cause. This manual reset provides the ____ protection required by Code for this type of appliance. A. short-circuitB. ground-faultC. overloadD. all of thesearrow_forwardFill in the blank 14. Mechanisms for __________ include switches,sensors,and circuitry.arrow_forward
- schedules are typically provided to detail the circuits and overcurrent protection required for listribution equipment. Branch-circuit - Outlet C. d. ore distribution points for electrical in .... Switch Panelboardarrow_forwardAnswer the following: A) Type of clipper circuit per level of clipping. 1. ___________ 2. ___________ 3. ___________ B) Type of clipper circuit per non-linear devices used. 1. ___________ 2. ___________ C) Other term for clipper circuit. 1. ___________ 2. ___________ 3. ___________arrow_forwardA means shall be provided in each metal box over 100 cubic inches for the connection of an equipment grounding conductor. The means shall be permitted to be ______. a tapped hole the cover screw III. a screw used to mount the box (a.) I only (c.) I & II only (b.) II only (d.) I, II or IIIarrow_forward
- b) Differentiate between Insulated-Neutral and Earthed-Neutral systems as applied to electrical distribution on board ship. c) Explain with sketches why it is necessary that a single ground fault in an insulated-earth distribution system must be located and cleared immediatelyarrow_forward___________ is an Area on a device characteristic where the ratio between applied voltage and resulting current is constant.arrow_forwardA shunt device that remains connected to the meter movement and thereby eliminates contact resistance problems is the_______ shunt.arrow_forward
- 6. According to the NEC, allowance for the future expansion of installations isA. an exception.B. in everyone's best interest.C. defined.D. a requirement.arrow_forwardPlease answer quickly. 17. The filament of incandescent lamp is usually made of: a. copper b. silver c. aluminum d. tungsten 18. A current measuring instrument can be modified to measure voltages by: a. using thicker wire in the coil b. using a high resistance shunt c. adding resistance in series d. adding resistance in parallel 21. "When two power sources are connected in a series-aiding configuration, the output voltage equals the _____________" a. supply with the highest voltage b. supply with the lowest voltage c. difference of the two supplies d. sum of the two suppliesarrow_forward5. An automatic switch or cutout is allowed in the equipment grounding conductor circuit when A. there's a redundant equipment grounding conductor in the circuit. B. the power sources are disconnected when operated. C. it's bonded around the disconnecting device. D. it also opens the neutral.arrow_forward
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