ELECTRICAL WIRING:RESIDENTAL-6 PLANS
18th Edition
ISBN: 9781305098329
Author: MULLIN
Publisher: CENGAGE L
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Chapter 4, Problem 19R
To determine
Choose the correct method of installation that is directly used in a concrete slab.
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Wiring methods permitted for service conductors include.
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Chapter 4 Solutions
ELECTRICAL WIRING:RESIDENTAL-6 PLANS
Ch. 4 - The largest size solid conductor generally...Ch. 4 - What is the minimum branch-circuit wire size that...Ch. 4 - What exceptions, if any, are there to the answer...Ch. 4 - What determines the ampacity of a wire?Ch. 4 - What unit of measurement is used for the diameter...Ch. 4 - What unit of measurement is used for the...Ch. 4 - What is the voltage rating of the conductors in...Ch. 4 - Indicate the allowable ampacity of the following...Ch. 4 - Prob. 9RCh. 4 - What are the colors of the conductors in...
Ch. 4 - For nonmetallic-sheathed cable, may the...Ch. 4 - Prob. 12RCh. 4 - Under what condition may nonmetallic-sheathed...Ch. 4 - a. What is the maximum distance permitted between...Ch. 4 - Prob. 15RCh. 4 - Prob. 16RCh. 4 - Prob. 17RCh. 4 - Prob. 18RCh. 4 - Prob. 19RCh. 4 - Circle the correct answer to the following...Ch. 4 - When running Type NM cable through a bored hole in...Ch. 4 - Where is the main service-entrance panel located...Ch. 4 - Is it permitted to use flexible metal conduit over...Ch. 4 - Liquidtight flexible metal conduit may serve as a...Ch. 4 - It is permissible for an electrician to connect...Ch. 4 - Terminals of switches and receptacles marked...Ch. 4 - Wire connectors marked AL/CU are suitable for use...Ch. 4 - A wire connector bearing no marking or reference...Ch. 4 - When Type NM cable is run through a floor, it must...Ch. 4 - When nonmetallic-sheathed cables are bunched or...Ch. 4 - In diagrams A and B, nonmetallic-sheathed cable is...Ch. 4 - The marking on the outer jacket of a...Ch. 4 - A 120-volt branch circuit supplies a resistive...Ch. 4 - In problem 35, it is desired to keep the voltage...Ch. 4 - Prob. 37RCh. 4 - The allowable ampacity of a 4 AWG THHN from Table...Ch. 4 - If, because of some obstruction in a wall space,...Ch. 4 - The recessed fluorescent luminaires installed in...Ch. 4 - Prob. 41RCh. 4 - What size overcurrent device protects the...Ch. 4 - May the 20-ampere small-appliance branch circuits...Ch. 4 - A 30-ampere branch circuit is installed for an...Ch. 4 - In many areas, metal framing members are being...Ch. 4 - Are set screwtype connectors permitted to be used...Ch. 4 - Most armored cable today has 90C conductors. What...Ch. 4 - If you saw two different types of SE cables, how...Ch. 4 - Circle the correct answer defining the type of...
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- Is it permitted to use flexible metal conduit over 6 ft (1.8 m) in length as a grounding means? (Yes) (No) (Circle the correct answer.)arrow_forwardIs it always necessary to attach the bare equipment grounding conductor of a nonmetallic-sheathed cable to the green hexagon-shaped grounding screw on a receptacle? Explain.arrow_forwardIf a grounding electrode conductor is connected at the first system disconnecting means or overcurrent device, the bonding jumper is sized the same as the ____. Select one: A. EQUIPMENT BONDING JUMPER B. POSITIVE CONDUCTOR C. SUPPLY-SIDE BONDING JUMPER D. NEUTRAL CONDUCTORarrow_forward
- A(n) _________ is a reliable conductor used to ensure the required electrical conductivity between metal parts required to be electrically connected. a) Equipment bonding jumper b) Bonding conductor of jumper c) Main bonding jumper d) Equipment grounding conductorarrow_forwardL1. Boxes are classified by type, construction, andA. installation location.B. luminaire support capability.C. number of knockouts.D. power rating L2. Which of the following devices must be placed at each end of an armored cable to prevent damage tothe conductors?A. An insulating sliderB. An insertion couplingC. An antishort bushingD. A metal loop fitting L3. Which of the following is the maximum cross-sectional conductor fill area for underfloor raceways?A. 50%B. 60%C. 40%D. 30%arrow_forwardThe ohms per 1000 feet measurements for conductors can be found in _____. Select one: a. article 100 definitions b. 310.15(B)(16) c. annex C d. chapter 9 Table 8arrow_forward
- 14. A grounded circuit conductor and the equipment grounding conductor should always be joined at theservice by aA. steel raceway.B. main bonding jumper.C. bus bar.D. short length of aluminum conductor.arrow_forward1.a. Which of the following is suitable as an equipment grounding conductor so long as it does so under morerestrictive conditions?A. Electrical metallic tubingB. Flexible metal conduitC. Rigid metal conduitD. Armored cable1.b. When rigid or intermediate metal conduit is installed in a hazardous location, it must be engaged by_______ threads into each connection.A. 4B. 3C. 2D. 5arrow_forward16. The primary purposes of insulation shielding are to confine voltage stresses to the ?, dissipate insulation leakage current, drain off capacitive current, and carry ground fault current to facilitate operation of the ground- fault protective devices. Oa. cable outer sheath Ob. circuit Oc. conductor Od. insulationarrow_forward
- Define line of supportarrow_forward1)Restrictions on types of conduits used for installing service, sub panel, emergency service panel. 2Requirements for underground or overhead services. 3Type of protection requirements for raceways containing conductors (i.e.conductor sizes). 4Temperature correction factors associated with installation. 8. Voltagedropconsiderationsarrow_forwardA? Conductor is defined in NEC 240.2 as a conductor, other than a service conductor, having overcurrent protection ahead of its point of supply that exceeds the value permitted for similar conductors that are not taps. A. Faulted b. Tap c. Magnetic d. Copper-likearrow_forward
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