Podcast
Questions and Answers
The purpose of a ceiling fitting is to:
The purpose of a ceiling fitting is to:
- Carry wires through conduit and other types of raceways
- Minimize the passage of gases, vapors, and flames through a conduit (correct)
- Bundle wires and cables together
The type of anchor shown in the figure above is:
The type of anchor shown in the figure above is:
- Drop in anchor
- Self drilling anchor
- Toggle bolt (correct)
NEC article 344 provides the requirements for:
NEC article 344 provides the requirements for:
- RMC (correct)
- PVC
- IMC
One characteristic of aluminum conduit is that it:
One characteristic of aluminum conduit is that it:
A type of conduit that has a wall thickness less than that of RMC but thicker than EMT is:
A type of conduit that has a wall thickness less than that of RMC but thicker than EMT is:
The voltage drop of conductors carrying alternating current in PVC will be less than that of identical conductors:
The voltage drop of conductors carrying alternating current in PVC will be less than that of identical conductors:
A type of fitting used to prevent damage to PVC caused by temperature changes is a(n):
A type of fitting used to prevent damage to PVC caused by temperature changes is a(n):
To act as a moisture seal, an outer covering of liquidtight, sunlight-resistant flexible material is placed around ____.
To act as a moisture seal, an outer covering of liquidtight, sunlight-resistant flexible material is placed around ____.
A type of conduit body with a 90 degree connector and the cover on the left is a:
A type of conduit body with a 90 degree connector and the cover on the left is a:
EMT is:
EMT is:
EMT must be supported every ____.
EMT must be supported every ____.
The maximum allowable spacing between horizontal wire way supports is ____.
The maximum allowable spacing between horizontal wire way supports is ____.
NEC Article 386 contains:
NEC Article 386 contains:
Another name for a stand off support is a:
Another name for a stand off support is a:
Derating factors shall only be applied when the number of current carrying conductors in a wire way exceeds:
Derating factors shall only be applied when the number of current carrying conductors in a wire way exceeds:
When an equipment frame is bonded to metal conduit, it acts as the equipment:
When an equipment frame is bonded to metal conduit, it acts as the equipment:
When making a conduit to box connection and a bonding wire will be installed, use a:
When making a conduit to box connection and a bonding wire will be installed, use a:
When installing conduit in reinforced concrete, it is best to use a:
When installing conduit in reinforced concrete, it is best to use a:
Wire bundles are commonly secured using:
Wire bundles are commonly secured using:
A typical metric fastener size is:
A typical metric fastener size is:
When installing hammer-driven pins and studs in soft concrete block, the drive pin or stud should be embedded in the concrete for at least:
When installing hammer-driven pins and studs in soft concrete block, the drive pin or stud should be embedded in the concrete for at least:
The highest power level for a powder-actuated device is:
The highest power level for a powder-actuated device is:
A type of anchor that is a good choice when jacking or leveling the fastening component is a:
A type of anchor that is a good choice when jacking or leveling the fastening component is a:
When using an empty anchoring system:
When using an empty anchoring system:
Cable trays are covered in ____.
Cable trays are covered in ____.
Cable trays mounted in a tunnel are most likely to use:
Cable trays mounted in a tunnel are most likely to use:
When transporting long lengths of raceway the job site:
When transporting long lengths of raceway the job site:
Conduit is best stored:
Conduit is best stored:
Conduit that passes from a classified location into an unclassified location requires the use of:
Conduit that passes from a classified location into an unclassified location requires the use of:
A type of fastener with a bulge shaped head is a:
A type of fastener with a bulge shaped head is a:
Flashcards
Ceiling Fitting Purpose
Ceiling Fitting Purpose
Minimizes the passage of gases, vapors, and flames through conduits.
Toggle Bolt
Toggle Bolt
Used when the figure indicates a specific type of anchor.
NEC Article 344
NEC Article 344
Governs the requirements for Rigid Metal Conduit (RMC).
Aluminum Conduit Characteristics
Aluminum Conduit Characteristics
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Intermediate Metal Conduit (IMC)
Intermediate Metal Conduit (IMC)
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Voltage Drop in PVC
Voltage Drop in PVC
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Temperature Protection for PVC
Temperature Protection for PVC
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Moisture Seal for Conduit
Moisture Seal for Conduit
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Conduit Body Types
Conduit Body Types
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EMT Characteristics
EMT Characteristics
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EMT Support Requirements
EMT Support Requirements
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Horizontal Wire Way Supports
Horizontal Wire Way Supports
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NEC Article 386
NEC Article 386
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Stand Off Support
Stand Off Support
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Derating Factors for Conductors
Derating Factors for Conductors
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Equipment Frame Bonding
Equipment Frame Bonding
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Conduit to Box Connection
Conduit to Box Connection
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Installing Conduit in Concrete
Installing Conduit in Concrete
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Securing Wire Bundles
Securing Wire Bundles
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Typical Metric Fastener Size
Typical Metric Fastener Size
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Hammer-Driven Pins and Studs
Hammer-Driven Pins and Studs
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Power Actuated Device Levels
Power Actuated Device Levels
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Anchor Types for Fastening Components
Anchor Types for Fastening Components
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Empty Anchoring System Best Practices
Empty Anchoring System Best Practices
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Cable Tray Regulations
Cable Tray Regulations
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Cable Tray Mounting in Tunnels
Cable Tray Mounting in Tunnels
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Transporting Long Lengths of Raceway
Transporting Long Lengths of Raceway
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Best Storage for Conduit
Best Storage for Conduit
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Transition Between Classified Locations
Transition Between Classified Locations
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Fastener Types
Fastener Types
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Study Notes
Ceiling Fitting Purpose
- Intended to minimize the passage of gases, vapors, and flames through conduits.
Anchor Types
- Toggle bolt is used when the figure indicates a specific type of anchor.
NEC Article 344
- Governs the requirements forRigid Metal Conduit (RMC).
Aluminum Conduit Characteristics
- More resistant to wet environments compared to other materials.
Conduit Wall Thickness
- Intermediate Metal Conduit (IMC) has a wall thickness that is between RMC and EMT.
Voltage Drop in PVC
- Conductors in PVC demonstrate a lower voltage drop than those in steel conduit.
Temperature Protection for PVC
- An expansion coupling is utilized to prevent PVC damage caused by temperature fluctuations.
Moisture Seal for Conduit
- A flexible metallic conduit requires a liquidtight, sunlight-resistant outer covering to act as a moisture seal.
Conduit Body Types
- A type LL or type LR conduit body has a 90-degree connector with the cover on the left.
EMT Characteristics
- EMT is often called thin-wall conduit and cannot be threaded.
EMT Support Requirements
- EMT must be supported at intervals not exceeding 10 feet (3 meters).
Horizontal Wire Way Supports
- Maximum allowable spacing is 10 feet (3 meters) between supports.
NEC Article 386
- Contains installation specifications for surface metal raceways.
Stand Off Support
- Another term for a stand off support is Minerallac.
Derating Factors for Conductors
- Derating factors apply when the number of current-carrying conductors in a wire way exceeds 30.
Equipment Frame Bonding
- Bonding an equipment frame to metal conduit functions as the equipment's grounding conductor.
Conduit to Box Connection
- A grounding locknut is preferred when a bonding wire is to be installed during a conduit to box connection.
Installing Conduit in Concrete
- Best practice is to use a concrete box with ears for installations in reinforced concrete.
Securing Wire Bundles
- Wire bundles are typically secured using tie raps.
Typical Metric Fastener Size
- An example of a metric fastener size is M8*1.
Hammer-Driven Pins and Studs
- In soft concrete block, pins or studs should be embedded at least 1-1/4 inches (32 mm).
Power Actuated Device Levels
- The highest power level for a powder-actuated device is level 12.
Anchor Types for Fastening Components
- A stud bolt anchor is ideal for jacking or leveling fastening components.
Empty Anchoring System Best Practices
- Use an anchor screen in hollow walls or brick for best results.
Cable Tray Regulations
- Covered under NEC Article 355.
Cable Tray Mounting in Tunnels
- Wall mounting is commonly used for cable trays in a tunnel setting.
Transporting Long Lengths of Raceway
- Ends of the raceway should be flagged during transport for safety.
Best Storage for Conduit
- Conduit is best stored in pipe racks to prevent damage.
Transition Between Classified Locations
- A sealing fitting is necessary when conduit transitions from a classified to an unclassified location.
Fastener Types
- A drywall screw is identified by a bulged head shape.
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