Level 1 Module 9
When conductors are installed where the ambient temperature is above ___ the conductor ampacity must be reduced proportionally with the increase in temperature
30 Degrees Celsius
Which of the following represents the largest wire size
4/0
The NEC specifies a minimum of ___ for connections made to wiring devices or for splices
6"
The difference between AC cable and MC cable is
AC Cable has Fire-Retardant Wraps on Individual Conductors; MC Cable does not
Type MV cable is suitable for
All Of The Above
The United States uses which of the following standard systems of wire sizes
American Wire Gauge
A conductor's ___ is the current the conductor can carry continuously without exceeding its temperature rating
Ampacity
___ is the maximum current in amperes a conductor can carry continuously under the conditions of use without exceeding its temperature rating
Ampacity
In two-conductor cable, the high side or hot wireis
Black
On a cable puller, the ___ is the part on which the pulling rope is wrapped and pulled
Capstan
A(n) ___ is a circle which has a diameter of 1 mil
Circular Mil
Polyethylene is used primarily for insulation of
Control and Communications Wiring
Type NMC cable is suitable for all of the following except
Embedding in Concrete
A conductor's size refers to the cross-sectional area of both the current-carrying wire and the insulation
False
In some cases, fixture wires may be used as a substitute for branch circuit conductors
False
True or False? Polyethylene is the base material used for the manufacture of TW and THW insulation
False
When feeding conductors into long runs of conduit, it is important to apply lubricant to the conductors only, and not to the conduit
False
A(n) ___ is a manually operated device that is used to pull a wire through conduit
Fish Tape
Which of the following cables should include a yellow color-coded conductor
Five-Conductor Cable
The operating temperature of the circuit is a primary factor in the selection of a
Fixture Wire
Which of the following describes Type FCC cable
Flat Conductor Cable
Size 4/0 wire has a
Greater Cross-Sectional Area than size 3/0
A grounding wire may be which of the following colors
Green
Polyethylene (PE) is used primarily for
Insulation of Control and Communication Wiring
Type UF cable
Is Suitable for Direct Burial
Which of the following describes Type TC cable
It consists of Two or more Insulated Conductor twisted together and covered with a Nonmetallic Jacket
In addition to being both flame-retardant and moisture-resistant, what characteristic does Type NMC cable have
It is Fungus- and Corrosion-Resistant
Which of the following is true of shielding in instrumentation circuits
It is Grounded at One End Only
It is important to do which of the following when conductors are fed into long runs of conduit
Make sure the Wires are Straight and do Not Cross Over each other
All of the following help to determine how good a material will be for the construction of wire except
Molecular Weight
A(n) ___ is a piston-like plug that is attached to a string or rope for pulling through conduit using a power fishing system
Mouse
Composed of foam rubber, a(n) ___ fits inside a piece of conduit and is propelled by compressed air or vacuumed through the conduit run, pulling a line or tape
Mouse
The ampacity ratings of conductors can be found in
NEC 310.16-310.21
When used as a service-entrance cable, Type SE cable must be installed as specified in
NEC Article 230
To determine the ampacity of copper conductors where conductors are used as a single conductor in free air at ambient temperatures of 30 degrees celsius, use
NEC Table 310.15(17)
Where can you find the ampacity of conductors for given conditions
NEC Tables 310.15(B)(16) through 310.15(B)(21)
The maximum size solid wire that should be terminated in pull boxes and disconnects is
No. 8
Type NMS cable is described as
Nonmetallic-Sheathed Cable
To prevent unwanted ground loops instrumentation cable shielding is
Not Grounded at Both Ends of the Wire
Some jackets have a(n) ___ that allows the jacket to be peeled back without the use of a knife or cable cutter
Nylon Rip Cord
A pulling line is usually made of
Nylon or other Synthetic Material
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 is not shown with cable markings
Prohibited Uses
A type of thermoset insulation is
RHW
What does the letter R stand for with regard to insulation coding
Rubber
According to the standard system of wire sizes in the United States, which ranges from 50 to 1, a larger number represents
Smaller Wire
The designation for one thousand circular mils is
Square Inches
Which of the following increases the flexibility of a wire
Stranding
What service conductor may be bare, green, or green with a yellow stripe
The Grounding Conductor of a Multi-Conductor Cable
A conductor's operating temperature is not determined by
The Number of Conductor Strands
True or False? All current-carrying conductors (including the grounded conductor) must be insulated when used on the inside of buildings
True
True or False? NEC Table 310.15(B)(16) covers conductors rated up to 2,000V where not more than three conductors are installed in a raceway or cable
True
True or False? Type NMC is suitable for direct burial
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
Type USE cable can be used for
Underground Installation including Direct Burial
What letter must be included in the marking of a conductor if it is to be used in a wet, outdoor application
W
During a pull, cable may be attached to the pulling rope using a(n)
Wire Grip
Compact stranding is used
With Aluminum Conductors
