ELECTRICAL WIRING:RESIDENTAL-6 PLANS
18th Edition
ISBN: 9781305098329
Author: MULLIN
Publisher: CENGAGE L
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Chapter 27, Problem 25R
To determine
Find the additional provision required on the conduit ends when insulated 4 AWG or larger conductors are required to be insulated.
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To testing installation of grounds, the usual procedure is to connect one lead of the megohmmeter to one of the conductors, then the other lead is___.
A, connected to another conductor b, connected to the conduit or raceway c. Connected to a special grounding electrode on the megohmmeter d. Left unconnected
If 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 CONDUCTOR
of p
o How many conductors enter the ceiling fan/light wall box?
Switch ond out let boxes
s tirst
10. What type and size of box may be used for the ceiling fan/light wall box?.
11. What type of covers are used with 4 in. square outlet boxes?
12. a. Does the circuit for the Master Bedroom have a grounded circuit conductor?
b. Does it have an equipment grounding conductor?
c. Explain the difference between a "grounded" conductor and an "equipment
grounding" conductor.
13. Approximately how many feet (meters) of 2-wire cable and 3-wire cable are needed to
ft
complete the circuit supplying the Master Bedroom? Two-wire cable:
ft (-
m).
m). Three-wire cable:
14. If the cable is laid in notches in the corner studs, what protection for the cable must be
provided?
15. How high are the receptacles mounted above the finished floor in this bedroom?
16. Approximately how far from the bedroom door is the first receptacle mounted? (See
the plans.)
17. What is the distance from the finished floor to…
Chapter 27 Solutions
ELECTRICAL WIRING:RESIDENTAL-6 PLANS
Ch. 27 - Define the Service Point. ______________Ch. 27 - Define service-drop conductors.Ch. 27 - Prob. 3RCh. 27 - a. The service head must be located (above)...Ch. 27 - Prob. 5RCh. 27 - When a conduit is extended through a roof, must it...Ch. 27 - a. What size and type of conductors are installed...Ch. 27 - How and where is the grounding electrode conductor...Ch. 27 - What are the minimum distances or clearances for...Ch. 27 - What are the minimum size ungrounded conductors...
Ch. 27 - What is the minimum size copper grounding...Ch. 27 - What is the recommended height of a meter socket...Ch. 27 - Prob. 13RCh. 27 - Prob. 14RCh. 27 - Prob. 15RCh. 27 - Prob. 16RCh. 27 - Prob. 17RCh. 27 - Prob. 18RCh. 27 - Prob. 19RCh. 27 - Prob. 20RCh. 27 - Prob. 21RCh. 27 - Prob. 22RCh. 27 - Prob. 23RCh. 27 - Prob. 24RCh. 27 - Prob. 25RCh. 27 - Prob. 26RCh. 27 - Prob. 27RCh. 27 - Prob. 28RCh. 27 - Prob. 29RCh. 27 - Prob. 30RCh. 27 - Prob. 31RCh. 27 - Prob. 32RCh. 27 - Prob. 33RCh. 27 - Prob. 34RCh. 27 - Prob. 35RCh. 27 - Prob. 36RCh. 27 - Prob. 37RCh. 27 - Prob. 38RCh. 27 - Prob. 39RCh. 27 - Prob. 40RCh. 27 - Prob. 42RCh. 27 - Prob. 43RCh. 27 - Prob. 44RCh. 27 - Prob. 45RCh. 27 - Prob. 46RCh. 27 - Prob. 47RCh. 27 - Prob. 48R
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- How many circuit wires enter the entry ceiling box? How many equipment grounding conductors enter the entry ceiling box?arrow_forwardThe coloring on individual conducting wires usually does not indicate a size or rating but rather the standard or preferred use of the wire. For example, black and red wires typically are used for currentcarrying or "hot" connections, and ___ wires usually are grounded "neutral" conductors. Green-insulated wires and bare copper wires are used for grounding wires.arrow_forwarda system or circuit conductor (one that carries current), that is intentially grounded is referred to as _____arrow_forward
- When connecting a multiwire (3-wire) circuit to a single phase panel, one ungrounded conductor must be connected to the ____ phase and the other ungrounded conductor must be connected to the ____ phase. Select one: a. A, A b. B, B c. A, B d. doesn’t matterarrow_forward- Loads, Service, and Overcurrent Protection 6.a. The general lighting load is based on a _______ per square foot basis.A. kilowattB. number of circuitsC. volt-ampereD. general illumination6.b. What's the primary disadvantage of using copper conductors?A. AvailabilityB. WeightC. CostD. Durabilityarrow_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_forward
- Conductors other than service conductors must not be installed in the same____. A. Service raceway B. Service cable C. Enclosure D. A or Barrow_forwardA(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_forwardThe wording that I am running into with questions such as "The number of conductors required to be installed between three-way and four-way switches is " is confusing. The text is not expalining this in a way that I am understanding anything other than grounding conductor, which is optional unless I am using a metal box. So what type of "conductor" is beng discussed?arrow_forward
- L1. 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_forward_ lines indicate exposed wiring.arrow_forwardOverhead service-drop conductors must have a horizontal clearance of __ from a pool. A. 6 ft B. 10 ft C. 8 ft D. 4 ftarrow_forward
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