Conductors and Cables
____maximum of four conductors, plus a grounding conductor, and comes in sizes from 14 AWG to 1 AWG.
AC cable has a
The difference between ___ cable and ___ cable is. ____ cable has fire-retardant wraps on individual conductors; ____ cable does not
AC, MC
Type _______ cable is flat conductor cable.
FCC
In some case, fixture wires may be used as a substitute for branch circuit conductors? True or False?
False
A hand device used to pull a wire through a conduit run.
Fish tape
A cylinder of foam rubber that fits inside the conduit and is then propelled by compressed air or vacuumed through the conduit run, pulling a line or tape.
Mouse
Type______ cable is power and control tray cable.
TC
What service conductor may be bare, green, or green with a yellow stripe?
The grounding conductor of a multi-conductor cable
A conductor's size refers to the cross-sectional area of both the current-carrying wire and the insulation. True or False?
True
The cable that is used for feeders and branch circuits is _____.
Type MC
Which of the following types of cables may be installed in concealed locations?
Type NM and NMC
Which of the following types of cable is suitable for direct burial?
Type UF
What letter must be included in the marking of a conductor if it is to be used in a wet outdoor application?
W
Type NMS cable is described as _____.
a. nonmetallic-sheathed cable
Type SE cable may be used ________ .
above ground only
two material for wire is ____.
aluminum & copper
It is important to do which of the following when conductors are fed into long runs of conduit?
c. Make sure the wires are straight and do not cross over each other.
In two-conductor cable, the high side or hot wire is _____.
c. black
Which of the following cables should include a yellow color-coded conductor?
d. Five-conductor cable
type NMC cable is suitable for all of the following?
dry locations, damp locations and corrosive locations
Type MC cable may be used _________.
for services, feeders, and branch circuits
Instrumentation wiring shielding is usually ________.
grounded at one end only
A pulling line is usually made of ?
nylon or other synthetic material
Copper is the most widely used conductor because it __________.
offers low resistance and is easy to use
The availability of a substance such as aluminum or copper affects the____ of the finished product (copper or aluminum wire).
price
In the standard system of wire sizes in the United States, from No. 50 through No. 1, the larger the number, the __________.
smaller the wire
Ampacity is the current in amperes a conductor can carry continuously under the conditions of use without exceeding its ____.
temperature rating
Compact stranding is used
with aluminum conductors
The current in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
Ampacity
A grounding wire may be which of the following colors?
Green
Which of the following describes Type TC cable?
It consists of two or more insulated conductor twisted together and covered with a nonmetallic jacket.
____no limitations on the number of conductors, and is sized from 18 AWG to 2,000 kcmil.
MC cable has
A type of thermoset insulation is
RHW
A device used to link pulling rope to cable during a pull
Wire grip
A typical color used for the Five conductor of a power cable is ______.
Yellow
A typical color used for the fourth conductor of a power cable is ______.
blue
Conductivity describes the ease (or difficulty) of travel presented to an electric current by a _____.
conductor
To prevent unwanted ground loops, instrument wiring is___.
not grounded at both ends of the wire
The selection of fixture wire depends primarily on the _________.
operating temperature of the circuit
Type UF cable may be used _________.
underground and in direct burial situations
Type USE cable can be used for ?
underground installation including direct burial
Cable markings show _______.
voltage rating
A circular mil is a circle that has a diameter of 1 mil. A mil is ____.
0.001 inch
NEC Table 310.16 covers conductors rated up to ____where not more than three conductors are installed in a raceway or cable or are directly buried in the earth, based on an ambient temperature of 30°C (86°F).
2,000 volts
The standard system of wire sizes in the United States is the ________.
American Wire Gauge
Which size wire has the greatest cross-sectional area?
0000
The NEC® specifies a minimum of ____ for connections made to wiring devices or for splices.
6"
The reason for choosing ___,___and___ strands for stranded conductors is that it is necessary to provide a flexible, almost round conductor.
7, 19, and 37
When feeding conductors into long runs of conduit, it is important to apply lubricant to the conductors only, never to the conduit. True or False?
False
What is the primary difference between ____ and ____ cable?___ is for dry environments only; ___ is for both dry and damp locations.
NM , NMC
The maximum size solid wire that should be terminated in pull boxes and disconnects is
No.8
What are the colors of insulation on the conductors for a three-conductor NM cable?
One white or gray, one red, one black, and a grounding conductor
Which of the following increases the flexibility of a wire?
a. Stranding
Size 4/0 wire has a ______.
a. greater cross-sectional area than size 3/0
All of the following help to determine how good a material will be for the construction of wire
availability, cost, conductivity
The grounding wire may be _______.
bare
The value of a material as an ingredient for wire is determined by several factors, including ____.
conductivity, cost, availability, and workability.
In addition to being both flame-retardant and moisture-resistant, what characteristic does Type NMC cable have?
d. It is fungus- and corrosion-resistant.
Which of the following is not shown with cable markings?
d. Prohibited uses
The operating temperature of the circuit is a primary factor in the selection of a _____.
d. fixture wire
The difference between AC cable and MC cable is ___?
embedding in concrete
The different sizes of wire and cable. The larger the cross-sectional area of current-carrying portion of a conductor, the _____.
higher the amount of current the wire can conduct
The purpose of stranding is to_____.
increase wìre flexibility
NM and NMU cables may be ______.
installed in concealed locations
Polyethylene (PE) is used primarily for
insulation of control and communication wiring
A factor not used in selecting conductors is the conductor's _________.
length
When conductors are led into long runs of conduit, it is important to_____.
make sure the wires are straight and do not cross over each other
NEC Table 310.17 covers both copper conductors and aluminum or copper-clad aluminum conductors up to 2,000 volts where conductors are used as ____, based on an ambient temperature of 30°C (86°F).
single conductors in free air
A conductor's operating temperature is not determined by
the number of conductor strands
The different sizes of wire and cable. The larger the number, _______.
the smaller the cross-sectional area of the wire
The turning drum of the cable puller on which the rope is wrapped and pulled.
Capstan
When used as a service-entrance cable, Type SE cable must be installed as specified in which Article_______.
NEC Article 230
Type NM and NMC cables are found in NEC article...
NEC Article 334
To determine the ampacity of copper conductors where conductors are used as a single conductor in free air at ambient temperatures of 30°C, use
NEC Table 310.17
Where can you find the ampacity of conductors for given conditions?
NEC Tables 310.15 (B)(16) through 310.15 (B)(21)
The ampacity ratings of conductors can be found in
NEC Tables 310.16 through 310.19
Type ____ cable is nonmetallic-sheathed cable.
NMS