Audio system circuits using Class 2 or Class 3 wiring methods shall not be permitted to be installed in the same cable or raceway with _____________?

Power-limited fire alarm conductors or cable

Washington 06(Limited Energy) Nec & Theory

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Washington 06(Limited Energy) Nec & Theory - Quiz

Thank you for taking Vivint's- Washington 06 Limited Energy Practice test- You must score 70% on this to pass the exam. You have 2 hours from when you begin. Use this to help you navigate the NEC and get a feel for what the actual exam will be like.

Questions and Answers

1.

According to Ohm’s law, if I = 6 amps and R = 2 Ohms, then E = __________ Volts?
- A.
  
  12
- B.
  
  3
- C.
  
  120
- D.
  
  4
Correct Answer
A. 12

Explanation
According to Ohm's law, the formula to calculate voltage (E) is E = I * R. In this case, the given values are I = 6 amps and R = 2 Ohms. Plugging these values into the formula, E = 6 * 2 = 12 volts. Therefore, the correct answer is 12.

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2.

Audio system circuits using Class 2 or Class 3 wiring methods shall not be permitted to be installed in the same cable or raceway with _____________?
- A.
  
  Power-limited fire alarm conductors or cable
- B.
  
  Other audio system circuits
- C.
  
  A or B
- D.
  
  None of these
Correct Answer
A. Power-limited fire alarm conductors or cable

Explanation
Audio system circuits using Class 2 or Class 3 wiring methods shall not be permitted to be installed in the same cable or raceway with power-limited fire alarm conductors or cable. This is because power-limited fire alarm conductors or cable require a separate cable or raceway to ensure proper functioning and to prevent interference or damage to the fire alarm system. Mixing these circuits together could compromise the safety and effectiveness of the fire alarm system.

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3.

Optical fiber plenum cables listed as suitable for use in space used for environmental air includes types ________ ?
- A.
  
  OFNG AND OFCG
- B.
  
  OFNP AND OFCP
- C.
  
  OFNG AND OFCG
- D.
  
  OFN AND OFC
Correct Answer
B. OFNP AND OFCP

Explanation
The correct answer is OFNP and OFCP. Optical fiber plenum cables that are listed as suitable for use in space used for environmental air include these two types. OFNP stands for Optical Fiber Nonconductive Plenum, which is designed for use in plenum spaces, such as the area above drop ceilings or below raised floors, where air circulation is necessary for heating, ventilation, and air conditioning systems. OFCP stands for Optical Fiber Conductive Plenum, which is similar to OFNP but includes additional conductive properties to meet specific safety requirements.

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4.

For non-power limited fire alarm circuits, an 18 AWG conductor shall be considered protected if the over-current device protecting the circuit is not over _______?
- A.
  
  7A
- B.
  
  10A
- C.
  
  15A
- D.
  
  20A
Correct Answer
A. 7A

Explanation
For non-power limited fire alarm circuits, an 18 AWG conductor is considered protected if the over-current device protecting the circuit is not over 7A. This means that as long as the over-current device does not exceed 7A, the 18 AWG conductor will be safe and not at risk of being damaged due to excessive current flow.

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5.

The branch circuit supplying the fire alarm equipment shall supply __________?
- A.
  
  Ground fault protection
- B.
  
  No other loads
- C.
  
  Conductive connection
- D.
  
  Backup power
Correct Answer
B. No other loads

Explanation
The branch circuit supplying the fire alarm equipment should not have any other loads connected to it. This is because the fire alarm equipment requires a dedicated circuit to ensure that it operates efficiently and does not get overloaded. Connecting other loads to the circuit can lead to power fluctuations and potential malfunctions in the fire alarm system, jeopardizing its effectiveness in detecting and alerting about fires. Therefore, it is crucial to have no other loads connected to the branch circuit supplying the fire alarm equipment.

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6.

Non-power-limited fire alarm circuits and __________ circuits shall be permitted to occupy the same cable, enclosure or raceway without regard to whether the individual circuits are AC or DC?
- A.
  
  Class 1
- B.
  
  Class 3
- C.
  
  Class 1 & 2
- D.
  
  Any of the above
Correct Answer
A. Class 1

Explanation
Non-power-limited fire alarm circuits and Class 1 circuits shall be permitted to occupy the same cable, enclosure or raceway without regard to whether the individual circuits are AC or DC.

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7.

Underground communications wires and cables in a raceway, handhole enclosure, or manhole containing electric light, power, Class 1, or NPLFA circuit conductors shall be in a section separated from such conductors by means of _______?
- A.
  
  Brick
- B.
  
  Tile
- C.
  
  Concrete
- D.
  
  Any of the above
Correct Answer
D. Any of the above

Explanation
Underground communications wires and cables must be separated from electric light, power, Class 1, or NPLFA circuit conductors by a section made of brick, tile, concrete, or any of the above materials. This is to ensure the safety and integrity of the communication lines and to prevent interference or damage from the electrical conductors.

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8.

Coaxial cables shall have a vertical clearance of not less than __________ from all points of roofs above which they pass?
- A.
  
  6 inches
- B.
  
  18 inches
- C.
  
  8 feet
- D.
  
  18 feet
Correct Answer
C. 8 feet

Explanation
Coaxial cables are used for transmitting high-frequency signals, such as those used in television and internet connections. To ensure proper functioning and to prevent interference, these cables need to have a sufficient vertical clearance from all points of roofs above which they pass. The correct answer of 8 feet ensures that there is enough distance between the cables and the roof to avoid any potential signal degradation or damage to the cables.

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9.

Communications wires and cables shall be separated at least _____________ from electric light and power conductors not in a raceway or cable.
- A.
  
  2 inches
- B.
  
  4 inches
- C.
  
  6 inches
- D.
  
  8 inches
Correct Answer
A. 2 inches

Explanation
The National Electrical Code (NEC) in the United States specifies that communications wires and cables must be separated by at least 2 inches from electric light and power conductors that are not enclosed in a raceway or cable. This separation helps to prevent electrical interference and ensures the safety and reliability of communication circuits.

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10.

Communication __________ cables shall be listed as being suitable for use in a vertical run in a shaft, or from floor to floor, and shall also be listed as having fire- resistant characteristics capable of preventing the carrying of fire from floor to floor.
- A.
  
  General purpose
- B.
  
  Plenum
- C.
  
  Riser
- D.
  
  None of these
Correct Answer
C. Riser

Explanation
Communication cables that are suitable for use in a vertical run in a shaft or from floor to floor, and that also have fire-resistant characteristics capable of preventing the carrying of fire from floor to floor, are referred to as riser cables.

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11.

Fire Alarm cables identified for future use shall be marked with a tag of sufficient durability to withstand the __________?
- A.
  
  Moisture
- B.
  
  Humidity
- C.
  
  Environment involved
- D.
  
  None of these
Correct Answer
C. Environment involved

Explanation
The correct answer is "Environment involved." Fire Alarm cables identified for future use need to be marked with a tag that can withstand the specific environment in which they will be installed. This ensures that the cables remain durable and functional, even in harsh conditions. Moisture and humidity are factors that can affect the cables' performance, but the overall environment involved encompasses all possible factors that may impact the cables. Therefore, marking the cables with a tag that can withstand the environment involved is the most appropriate choice.

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12.

Single conductors for a PLFA circuit shall not be smaller than __________?
- A.
  
  12 AWG
- B.
  
  16 AWG
- C.
  
  18 AWG
- D.
  
  22 AWG
Correct Answer
C. 18 AWG

Explanation
The correct answer is 18 AWG because smaller conductors may not be able to handle the current flow required for a PLFA circuit. AWG stands for American Wire Gauge, and it is a standardized system for measuring the diameter of electrical conductors. A larger AWG number indicates a smaller conductor size. Therefore, a smaller AWG number, such as 12 or 16, would have a larger conductor size and be able to handle more current flow. However, a smaller conductor, such as 22 AWG, would have a smaller size and may not be able to safely carry the necessary current for a PLFA circuit.

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13.

Communications wires and cables shall have a temperature rating of not less than _________?
- A.
  
  600 degrees Fahrenheit
- B.
  
  60 degrees Fahrenheit
- C.
  
  60 degrees Celsius
- D.
  
  32 degrees Fahrenheit
Correct Answer
C. 60 degrees Celsius

Explanation
Communications wires and cables need to have a temperature rating that is not less than 60 degrees Celsius. This temperature rating ensures that the wires and cables can withstand high temperatures without getting damaged or causing any safety hazards. It is important for communication systems to have cables and wires that can handle high temperatures to ensure reliable and efficient communication. A temperature rating of 60 degrees Celsius is necessary to meet these requirements.

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14.

General Use communications cables will be marked as __________?
- A.
  
  CM
- B.
  
  CMX
- C.
  
  CMG
- D.
  
  A and C
Correct Answer
D. A and C

Explanation
General use communications cables will be marked as CM and CMG. CM stands for "Communications Multipurpose" and is the most common rating for general use cables. CMG stands for "Communications Multipurpose General" and is a higher rating that indicates the cable has met additional fire safety requirements. Therefore, both CM and CMG markings can be found on general use communications cables.

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15.

Which of the following NEC (National Electrical Code) articles primarily governs the installation and use of low-voltage Class 2 and Class 3 circuits, ensuring protection against fire and electric shock in limited energy systems?
- A.
  
  Article 210
- B.
  
  Article 300
- C.
  
  Article 725
- D.
  
  Article 800
Correct Answer
C. Article 725

Explanation
Article 725 of the NEC specifically governs the installation of Class 1, Class 2, and Class 3 remote-control, signaling, and power-limited circuits. It provides rules to prevent fire and electric shock in limited energy systems. Articles 210, 300, and 800 deal with other aspects of electrical installations, such as branch circuits, wiring methods, and communications systems, respectively, making Article 725 the correct and relevant choice for limited energy systems.

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16.

The accessible portion of abandoned coaxial cable shall be __________?
- A.
  
  Removed
- B.
  
  Replaced
- C.
  
  Tagged for future use
- D.
  
  Bundled and secured
Correct Answer
A. Removed

Explanation
The accessible portion of abandoned coaxial cable should be removed. This is because abandoned cables can pose safety hazards and can interfere with the performance of active cables. Removing them ensures a clean and organized cable infrastructure, reducing the risk of accidents and improving overall network efficiency.

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17.

An optical fiber application requires OFCR cabling but you are out. What listed cable(s) can be substituted?
- A.
  
  OFNP
- B.
  
  OFNR
- C.
  
  OFCP
- D.
  
  Any of the above
Correct Answer
D. Any of the above

Explanation
OFCR (Optical Fiber Communications Riser) cabling is specifically designed for use in vertical applications such as between floors in a building. If OFCR cabling is not available, any of the other listed cables can be substituted. OFNP (Optical Fiber Nonconductive Plenum) is suitable for use in plenum spaces, while OFNR (Optical Fiber Nonconductive Riser) is suitable for use in vertical applications. OFCP (Optical Fiber Conductive Plenum) is suitable for use in plenum spaces where a conductive cable is required. Therefore, any of these cables can be used as a substitute for OFCR cabling.

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18.

You are installing a medium-powered broadband network. What cable type do you need for the outdoor, underground run?
- A.
  
  BMU
- B.
  
  BLX
- C.
  
  BLU
- D.
  
  Cat5E
Correct Answer
A. BMU

Explanation
BMU is the correct answer because when installing a medium-powered broadband network for an outdoor, underground run, a cable type that is specifically designed for outdoor and underground use is required. BMU is a cable type that meets these requirements and is suitable for such installations. BLX, BLU, and Cat5E are not specifically designed for outdoor and underground use, making BMU the most appropriate choice.

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19.

Where practical, lightning conductors shall be separated by at least __________ between communication wires and cables on buildings?
- A.
  
  4 inches
- B.
  
  6 ft
- C.
  
  6 inches
- D.
  
  2 ft
Correct Answer
B. 6 ft

Explanation
Lightning conductors are designed to protect buildings from lightning strikes by providing a path for the electrical current to safely reach the ground. To ensure their effectiveness, it is important to separate lightning conductors from communication wires and cables on buildings. The recommended minimum separation distance is 6 ft. This distance helps to prevent interference between the lightning conductor and the communication wires, reducing the risk of damage to the wires and ensuring the proper functioning of both systems.

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20.

For an NPLFA circuit the conductor shall be __________?
- A.
  
  Cat5E cable
- B.
  
  Stranded aluminum
- C.
  
  Solid or stranded copper
- D.
  
  Solid aluminum
Correct Answer
C. Solid or stranded copper

Explanation
The correct answer is solid or stranded copper. This is because NPLFA circuits require a conductor material that has good conductivity and low resistance. Copper is widely used in electrical wiring due to its high conductivity, durability, and resistance to corrosion. Both solid and stranded copper conductors are suitable for NPLFA circuits, depending on the specific application and installation requirements.

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21.

A conductive optical fiber cable is going to be used to run between multiple floors. What type of cable shall it be listed as? (Cable substitutions do not apply)
- A.
  
  OFC
- B.
  
  OFCR
- C.
  
  OFCG
- D.
  
  OFCP
Correct Answer
B. OFCR

Explanation
The correct answer is OFCR. OFCR stands for Optical Fiber Cable Riser. In this scenario, since the cable is going to be used to run between multiple floors, it needs to be a riser cable. Riser cables are specifically designed for vertical applications and are suitable for installation in vertical shafts or runs between floors. OFC, OFCG, and OFCP are not the appropriate types of cables for this purpose.

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22.

A _________location may be temporarily subject to dampness and wetness?
- A.
  
  Dry
- B.
  
  Damp
- C.
  
  Moist
- D.
  
  Wet
Correct Answer
A. Dry

Explanation
A dry location may be temporarily subject to dampness and wetness. This suggests that even though a location is typically dry, there may be instances where it becomes damp or wet for a short period of time.

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23.

An arrestor connected between each line conductor and ground, a fuse in series with each line conductor, and an appropriate mounting arrangement is called?
- A.
  
  Bonding
- B.
  
  Bonding conductor
- C.
  
  Fused primary protector
- D.
  
  Fuseless primary protector
Correct Answer
C. Fused primary protector

Explanation
A fused primary protector is a device that is connected between each line conductor and ground, and it includes both an arrestor and a fuse in series with each line conductor. This arrangement provides protection by both diverting excessive voltage to ground through the arrestor and by breaking the circuit in case of a fault or overload through the fuse. This ensures that the equipment connected to the line is protected from power surges and other electrical faults.

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24.

Communications wires and cables shall be separated by at least __________ inches from electric light or power conductors not in a raceway or cable?
- A.
  
  12 inches
- B.
  
  1 foot
- C.
  
  4 inches
- D.
  
  8 inches
Correct Answer
C. 4 inches

Explanation
Communications wires and cables need to be separated by at least 4 inches from electric light or power conductors that are not in a raceway or cable. This is necessary to prevent interference and ensure the safety of the communication system.

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25.

Insulation on NPLFA conductors shall be rated for __________?
- A.
  
  120 Volts
- B.
  
  240 Volts
- C.
  
  360 Volts
- D.
  
  600 Volts
Correct Answer
D. 600 Volts

Explanation
The insulation on NPLFA conductors should be rated for 600 Volts. This rating ensures that the insulation can withstand the voltage level without breaking down or causing any electrical hazards. Using insulation with a lower voltage rating may result in insulation failure and potential electrical accidents. Therefore, it is important to use insulation that is specifically rated for the voltage level at which it will be used.

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26.

NPLFA cable that is listed with the suffix “CI” means __________?
- A.
  
  Cable Integrity
- B.
  
  Circuit Integrity
- C.
  
  Communications Interface
- D.
  
  Circuit Interface
Correct Answer
B. Circuit Integrity

Explanation
The correct answer is "Circuit Integrity". NPLFA cable listed with the suffix "CI" indicates that it is designed to maintain its circuit integrity even in the event of fire or extreme temperatures. This type of cable is commonly used in critical applications where fire resistance and the ability to maintain communication during emergencies are essential.

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27.

Fire alarm cables that are not terminated at equipment and not identified for future use are considered __________?
- A.
  
  Available
- B.
  
  Abandoned
- C.
  
  Accessible
- D.
  
  Deserted
Correct Answer
B. Abandoned

Explanation
Fire alarm cables that are not terminated at equipment and not identified for future use are considered "abandoned" because they are not being used or maintained and are left unused or neglected.

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28.

Conductive optical fiber cables contain non-current carrying conductive members such as metallic __________?
- A.
  
  Strength members
- B.
  
  Vapor barriers
- C.
  
  Armor or sheath
- D.
  
  Any of these
Correct Answer
D. Any of these

Explanation
Conductive optical fiber cables can contain non-current carrying conductive members such as metallic strength members, vapor barriers, or armor/sheath. These components are included in the design of the cable to provide additional strength, protection against moisture or other environmental factors, and to ensure the overall integrity of the cable. Therefore, any of these options could be present in conductive optical fiber cables.

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29.

For branch-circuit overcurrent protection, a flexible cord used in listed extension cord sets shall be considered to be protected when used within ________?
- A.
  
  Indoor installations
- B.
  
  Unclassified locations
- C.
  
  Extension cord listing requirements
- D.
  
  50 feet of the branch-circuit panel board
Correct Answer
C. Extension cord listing requirements

Explanation
The correct answer is "Extension cord listing requirements". This means that a flexible cord used in listed extension cord sets will be considered protected when it meets the requirements and standards set forth for extension cords. This ensures that the cord has been tested and approved for safe use in branch-circuit overcurrent protection.

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30.

Where rock bottom is encountered when driving a ground rod at an angle up to 45 degrees, the electrode can be buried in a trench that is at least __________ deep?
- A.
  
  18 inches
- B.
  
  30 inches
- C.
  
  4 feet
- D.
  
  8 feet
Correct Answer
B. 30 inches

Explanation
When encountering rock bottom while driving a ground rod at an angle up to 45 degrees, burying the electrode in a trench that is at least 30 inches deep is the correct solution. This depth allows for proper grounding and ensures that the electrode is securely placed in the ground, even in rocky conditions.

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31.

In both exposed and concealed locations where a cable or raceway-type wiring method is installed through bored holes, the edge of the hole cannot be less than __________ from the nearest edge of the wood member.
- A.
  
  1-1/8 inch
- B.
  
  1 inch
- C.
  
  1-1/4 inch
- D.
  
  1-1/2 inch
Correct Answer
C. 1-1/4 inch

Explanation
When installing a cable or raceway-type wiring method through bored holes in both exposed and concealed locations, the edge of the hole must be at least 1-1/4 inch away from the nearest edge of the wood member. This requirement ensures that there is enough space for the wiring method to be properly installed and protected, reducing the risk of damage or overheating.

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32.

Communications wires and coaxial cables shall have a vertical clearance of not less than __________ from all points of roofs above which they pass.
- A.
  
  4 feet
- B.
  
  8 feet
- C.
  
  10 feet
- D.
  
  12 feet
Correct Answer
B. 8 feet

Explanation
Communications wires and coaxial cables must have a vertical clearance of at least 8 feet from all points of roofs above which they pass. This clearance is necessary to ensure that the wires and cables do not come into contact with the roof or any other objects, which could cause damage or interference with the communication signals. It also allows for proper installation and maintenance of the wires and cables.

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33.

Openings around penetrations of communications cables and raceways through fire-resistant-rated walls, partitions, floors, or ceilings shall be __________ using approved methods to maintain the fire-resistance rating.
- A.
  
  Closed
- B.
  
  Opened
- C.
  
  Draft-stopped
- D.
  
  Fire-stopped
Correct Answer
D. Fire-stopped

Explanation
The correct answer is "Fire-stopped." Openings around penetrations of communications cables and raceways through fire-resistant-rated walls, partitions, floors, or ceilings need to be fire-stopped using approved methods to maintain the fire-resistance rating. This means that appropriate materials and techniques must be used to prevent the spread of fire through these openings, ensuring that the fire-resistance rating of the structure is maintained.

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34.

Which of the following is not a standard size fuse or inverse time circuit breaker?
- A.
  
  45A
- B.
  
  70A
- C.
  
  75A
- D.
  
  80A
Correct Answer
C. 75A

Explanation
The given options include standard sizes for fuses and inverse time circuit breakers, except for the 75A option. This indicates that 75A is not a standard size for either a fuse or an inverse time circuit breaker.

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35.

All mechanical elements used to terminate a grounding electrode conductor or bonding jumper to a grounding electrode shall be ___________ ?
- A.
  
  Accessible
- B.
  
  Secured
- C.
  
  In plain view
- D.
  
  Open
Correct Answer
A. Accessible

Explanation
All mechanical elements used to terminate a grounding electrode conductor or bonding jumper to a grounding electrode should be accessible. This means that they should be easily reachable and not obstructed, allowing for proper maintenance, inspection, and repairs if necessary. By ensuring accessibility, it ensures that the grounding system is functioning effectively and can be easily accessed when needed.

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36.

Underground service conductors that are not encased in concrete and that are buried 18 inches or more below grade shall have their location identified by __________?
- A.
  
  Utility marking flag
- B.
  
  Specific note at service panel
- C.
  
  Weather durable tag
- D.
  
  Warning ribbon in the trench
Correct Answer
D. Warning ribbon in the trench

Explanation
When underground service conductors are buried 18 inches or more below grade, it is important to identify their location to prevent accidental damage. One way to do this is by using a warning ribbon in the trench. This ribbon serves as a visual indication of the presence of the conductors and alerts anyone who may be digging or working in the area to exercise caution. It helps prevent accidental digging or damage to the conductors, ensuring the safety and integrity of the electrical system.

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37.

Conductors of AC and DC circuits, rated at 600 volts, nominal or less, _________ permitted to occupy the same equipment wiring enclosure, cable or raceway.
- A.
  
  May not be
- B.
  
  Shall be
- C.
  
  May temporarily be
- D.
  
  Will always be
Correct Answer
B. Shall be

Explanation
AC and DC circuits, rated at 600 volts or less, are required to be permitted to occupy the same equipment wiring enclosure, cable, or raceway. This means that it is mandatory for both types of circuits to coexist in the same space.

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38.

Exposed CATV cables shall be secured by hardware such as straps, staples, cable ties, hangers or similar fittings designed and installed to ___________________?
- A.
  
  Protect the cable from weather
- B.
  
  Maintain signal strength
- C.
  
  Not damage the cables
- D.
  
  Protect the building from damage
Correct Answer
C. Not damage the cables

Explanation
The hardware used to secure exposed CATV cables, such as straps, staples, cable ties, hangers, or similar fittings, are designed and installed in order to prevent any damage to the cables. This ensures that the cables remain intact and functional, without any physical harm or impairment.

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39.

Network-powered broadband communications cables shall not be attached to a cross-arm that carries __________?
- A.
  
  Electric lights
- B.
  
  NPLFA circuits
- C.
  
  Power conductors
- D.
  
  A and C
Correct Answer
D. A and C

Explanation
Network-powered broadband communications cables should not be attached to a cross-arm that carries electric lights or power conductors. This is because the electromagnetic interference generated by the power conductors and the electrical lights can interfere with the signal transmission in the network-powered broadband communications cables. Therefore, it is recommended to keep these cables separate from any sources of electrical power to ensure optimal performance and minimize interference.

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40.

Wiring laid in notches of wood studs, joists, rafters or other wood members must be protected by a steel plate at least __________ thick, of appropriate length and width to cover the area of the wiring.
- A.
  
  1/2 inch
- B.
  
  1/4 inch
- C.
  
  1/8 inch
- D.
  
  1/16 inch
Correct Answer
D. 1/16 inch

Explanation
Wiring laid in notches of wood studs, joists, rafters, or other wood members must be protected by a steel plate at least 1/16 inch thick. This thickness is necessary to provide adequate protection to the wiring from potential damage caused by nails, screws, or other fasteners that may be driven into the wood members. The steel plate acts as a barrier, preventing any potential puncture or penetration of the wiring, ensuring its safety and integrity.

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41.

In Washington's Limited Energy NEC requirements, which of the following must be considered when installing low-voltage cabling in an air-handling plenum space?
- A.
  
  Cables must be rated as CL2P or CL3P.
- B.
  
  Cables can be installed without any special rating in a plenum.
- C.
  
  Cables must be enclosed in metal conduit only.
- D.
  
  Cables must be rated as CM or CMX.
Correct Answer
A. Cables must be rated as CL2P or CL3P.

Explanation
In air-handling plenum spaces, the NEC requires that low-voltage cables be rated for plenum use, such as CL2P or CL3P. These ratings ensure that the cables are designed to limit the spread of fire and produce minimal smoke, which is crucial in plenum spaces where air circulation can spread hazardous fumes. Cables without these ratings are not permitted in plenum spaces, and while metal conduit can offer protection, it’s not the requirement here.

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42.

Cable used in a wet location for a NPLFA circuit shall be listed for use as such or have a __________?
- A.
  
  Insulating wrap
- B.
  
  Moisture impervious metal sheath
- C.
  
  Isolating sheath
- D.
  
  Water-proof electrical tape coating
Correct Answer
B. Moisture impervious metal sheath

Explanation
Cable used in a wet location for a NPLFA circuit shall be listed for use as such or have a moisture impervious metal sheath. This is because a wet location requires extra protection against moisture, and a moisture impervious metal sheath provides the necessary barrier to prevent water from entering the cable and causing damage. Insulating wrap, isolating sheath, and water-proof electrical tape coating may provide some level of protection, but they may not be as effective or durable as a moisture impervious metal sheath.

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43.

A bonding jumper not smaller than __________ copper or equivalent shall be connected between the communications grounding electrode and power grounding electrode system at the building or structure served when separate electrodes are used.
- A.
  
  6 AWG
- B.
  
  12 AWG
- C.
  
  16 AWG
- D.
  
  22 AWG
Correct Answer
A. 6 AWG

Explanation
A bonding jumper not smaller than 6 AWG copper or equivalent should be connected between the communications grounding electrode and power grounding electrode system at the building or structure served when separate electrodes are used. This ensures a proper electrical connection between the two grounding systems, allowing for the safe dissipation of electrical currents and preventing potential electrical hazards.

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44.

As applied to equipment; admitting close approach, not guarded by locked doors , elevation or other effective means is defined as____________ ?
- A.
  
  Readily accessible
- B.
  
  Accessible
- C.
  
  Available
- D.
  
  Enclosed
Correct Answer
A. Readily accessible

Explanation
The term "readily accessible" refers to equipment that can be approached easily without barriers like locked doors or elevation changes. This definition emphasizes safety and compliance, ensuring that individuals can access equipment as needed without undue obstacles. Such accessibility is crucial for maintenance, operation, or emergency situations, highlighting the importance of having equipment available for users without complicated entry requirements.

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45.

When one electrical circuit controls another circuit through a relay, the first circuit is called a _________?
- A.
  
  Control circuit
- B.
  
  Remote control circuit
- C.
  
  Signal circuit
- D.
  
  Controller
Correct Answer
B. Remote control circuit

Explanation
When one electrical circuit controls another circuit through a relay, the first circuit is called a remote control circuit. This is because the first circuit is able to remotely control the second circuit by activating or deactivating the relay. The relay acts as a switch that allows the first circuit to control the flow of electricity in the second circuit.

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46.

The grounding in coaxial cable applications, the bonding conductor or grounding electrode conductor shall not be smaller than what AWG#__________?
- A.
  
  18
- B.
  
  12
- C.
  
  14
- D.
  
  16
Correct Answer
C. 14

Explanation
In coaxial cable applications, the grounding or bonding conductor should not be smaller than AWG#14. This is because a larger gauge wire provides better conductivity and ensures proper grounding, which is essential for safety and effective functioning of the coaxial cable system. A smaller gauge wire may not be able to handle the required current and could result in poor grounding, leading to potential electrical hazards or interference in the cable signal.

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47.

Coaxial cables for community antenna television systems, installed in vertical runs and penetrating more than one floor or cables installed in vertical runs in a shaft, shall be type __________?
- A.
  
  CATV
- B.
  
  CATVX
- C.
  
  CATVR
- D.
  
  Any of these
Correct Answer
C. CATVR

Explanation
Coaxial cables used for community antenna television (CATV) systems, when installed in vertical runs and penetrating multiple floors or in a shaft, should be of type CATVR. This specific type of coaxial cable is designed to meet the requirements for vertical installations, ensuring optimal performance and signal transmission in these scenarios. CATVR cables are specifically engineered to withstand the challenges of vertical runs, providing reliable and efficient connectivity for CATV systems.

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48.

PLFA circuits shall be installed in hoist ways using __________?
- A.
  
  Rigid Metal Conduit
- B.
  
  Rigid nonmetallic conduit
- C.
  
  Electrical metal tubing
- D.
  
  Any of the above
Correct Answer
D. Any of the above

Explanation
PLFA circuits, which stands for Power-Limited Fire Alarm, are used for fire alarm systems. These circuits can be installed in hoist ways using various types of conduits, including rigid metal conduit, rigid nonmetallic conduit, or electrical metal tubing. Therefore, any of the above options can be used for installing PLFA circuits in hoist ways.

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49.

Communication plenum cable shall be __________ as being suitable for use in other spaces used for environmental air?
- A.
  
  Marked
- B.
  
  Identified
- C.
  
  Approved
- D.
  
  Listed
Correct Answer
D. Listed

Explanation
Communication plenum cable shall be listed as being suitable for use in other spaces used for environmental air. "Listed" means that the cable has been tested and meets the specific requirements and standards set by regulatory authorities. This ensures that the cable is safe to use in spaces where air circulation is important, such as plenum spaces. The listing indicates that the cable has undergone rigorous testing and has been approved for use in these specific environments.

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50.

Optical fiber riser cables listed as suitable for use in a vertical run in a shaft or from floor to floor includes types __________?
- A.
  
  OFNP AND OFCP
- B.
  
  OFNR AND OFCR
- C.
  
  OFNG AND OFCG
- D.
  
  OFN AND OFC
Correct Answer
B. OFNR AND OFCR

Explanation
The correct answer is OFNR AND OFCR. OFNR stands for Optical Fiber Nonconductive Riser and OFCR stands for Optical Fiber Conductive Riser. These types of cables are suitable for vertical runs in a shaft or from floor to floor. OFNR cables are designed to prevent the spread of fire and are suitable for riser applications, while OFCR cables have additional conductive properties to provide grounding and are used in riser applications where grounding is required.

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May 16, 2012

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Washington 06(Limited Energy) Nec & Theory

According to Ohm’s law, if I = 6 amps and R = 2 Ohms, then E = __________ Volts?

Audio system circuits using Class 2 or Class 3 wiring methods shall not be permitted to be installed in the same cable or raceway with _____________?

Optical fiber plenum cables listed as suitable for use in space used for environmental air includes types ________ ?

For non-power limited fire alarm circuits, an 18 AWG conductor shall be considered protected if the over-current device protecting the circuit is not over _______?

The branch circuit supplying the fire alarm equipment shall supply __________?

Non-power-limited fire alarm circuits and __________ circuits shall be permitted to occupy the same cable, enclosure or raceway without regard to whether the individual circuits are AC or DC?

Underground communications wires and cables in a raceway, handhole enclosure, or manhole containing electric light, power, Class 1, or NPLFA circuit conductors shall be in a section separated from such conductors by means of _______?

Coaxial cables shall have a vertical clearance of not less than __________ from all points of roofs above which they pass?

Communications wires and cables shall be separated at least _____________ from electric light and power conductors not in a raceway or cable.

Communication __________ cables shall be listed as being suitable for use in a vertical run in a shaft, or from floor to floor, and shall also be listed as having fire- resistant characteristics capable of preventing the carrying of fire from floor to floor.

Fire Alarm cables identified for future use shall be marked with a tag of sufficient durability to withstand the __________?

Single conductors for a PLFA circuit shall not be smaller than __________?

Communications wires and cables shall have a temperature rating of not less than _________?

General Use communications cables will be marked as __________?

Which of the following NEC (National Electrical Code) articles primarily governs the installation and use of low-voltage Class 2 and Class 3 circuits, ensuring protection against fire and electric shock in limited energy systems?

The accessible portion of abandoned coaxial cable shall be __________?

An optical fiber application requires OFCR cabling but you are out. What listed cable(s) can be substituted?

You are installing a medium-powered broadband network. What cable type do you need for the outdoor, underground run?

Where practical, lightning conductors shall be separated by at least __________ between communication wires and cables on buildings?

For an NPLFA circuit the conductor shall be __________?

A conductive optical fiber cable is going to be used to run between multiple floors. What type of cable shall it be listed as? (Cable substitutions do not apply)

A _________location may be temporarily subject to dampness and wetness?

An arrestor connected between each line conductor and ground, a fuse in series with each line conductor, and an appropriate mounting arrangement is called?

Communications wires and cables shall be separated by at least __________ inches from electric light or power conductors not in a raceway or cable?

Insulation on NPLFA conductors shall be rated for __________?

NPLFA cable that is listed with the suffix “CI” means __________?

Fire alarm cables that are not terminated at equipment and not identified for future use are considered __________?

Conductive optical fiber cables contain non-current carrying conductive members such as metallic __________?

For branch-circuit overcurrent protection, a flexible cord used in listed extension cord sets shall be considered to be protected when used within ________?

Where rock bottom is encountered when driving a ground rod at an angle up to 45 degrees, the electrode can be buried in a trench that is at least __________ deep?

In both exposed and concealed locations where a cable or raceway-type wiring method is installed through bored holes, the edge of the hole cannot be less than __________ from the nearest edge of the wood member.

Communications wires and coaxial cables shall have a vertical clearance of not less than __________ from all points of roofs above which they pass.

Openings around penetrations of communications cables and raceways through fire-resistant-rated walls, partitions, floors, or ceilings shall be __________ using approved methods to maintain the fire-resistance rating.

Which of the following is not a standard size fuse or inverse time circuit breaker?

All mechanical elements used to terminate a grounding electrode conductor or bonding jumper to a grounding electrode shall be ___________ ?

Underground service conductors that are not encased in concrete and that are buried 18 inches or more below grade shall have their location identified by __________?

Conductors of AC and DC circuits, rated at 600 volts, nominal or less, _________ permitted to occupy the same equipment wiring enclosure, cable or raceway.

Exposed CATV cables shall be secured by hardware such as straps, staples, cable ties, hangers or similar fittings designed and installed to ___________________?

Network-powered broadband communications cables shall not be attached to a cross-arm that carries __________?

Wiring laid in notches of wood studs, joists, rafters or other wood members must be protected by a steel plate at least __________ thick, of appropriate length and width to cover the area of the wiring.

In Washington's Limited Energy NEC requirements, which of the following must be considered when installing low-voltage cabling in an air-handling plenum space?

Cable used in a wet location for a NPLFA circuit shall be listed for use as such or have a __________?

A bonding jumper not smaller than __________ copper or equivalent shall be connected between the communications grounding electrode and power grounding electrode system at the building or structure served when separate electrodes are used.

As applied to equipment; admitting close approach, not guarded by locked doors , elevation or other effective means is defined as____________ ?

When one electrical circuit controls another circuit through a relay, the first circuit is called a _________?

The grounding in coaxial cable applications, the bonding conductor or grounding electrode conductor shall not be smaller than what AWG#__________?

Coaxial cables for community antenna television systems, installed in vertical runs and penetrating more than one floor or cables installed in vertical runs in a shaft, shall be type __________?

PLFA circuits shall be installed in hoist ways using __________?

Communication plenum cable shall be __________ as being suitable for use in other spaces used for environmental air?

Optical fiber riser cables listed as suitable for use in a vertical run in a shaft or from floor to floor includes types __________?