Worksheets26207 power point 2 Quiz
Total questions: 15
Worksheet time: 8mins
The load capacity of a cable tray is influenced by which material aspect?
Material used
Color of the material
Age of the material
Weight of the material
Which factor is considered when determining the load capacity of a cable tray?
Safety factor used
Color of the tray
Length of the tray
Type of cables
What method is used to determine the allowable load of a cable tray?
Method used to determine the allowable load
Color coding method
Length measurement method
Weight estimation method
Which factor affects the support of a cable tray?
Method of supporting the tray
Color of the support
Length of the support
Type of support material
Which of the following is NOT a factor in determining the load capacity of a cable tray?
Type of connectors used
Spacing of rungs
Material used
Method used to determine the allowable load
What are the two types of cable tray failure?
Longitudinal and transverse
Vertical and horizontal
Diagonal and parallel
Circular and linear
What must single-conductor cable be marked for according to NEC Section 392.10(B)(1)(d)?
Use in hoistways
Use in cable trays
Use in ducts
Use in plenums
According to NEC Section 300.8, where must electrical conductors not be installed?
In the same raceways with water pipes
In the same raceways with gas pipes
In the same raceways with steam pipes
All of the above
What is a requirement for cable tray systems according to NEC Sections 392.12 and 300.22(C)(2)?
Must have a solid metal bottom
Must be used in hoistways
Must be used in ducts
Must be used in plenums
What does NEC Section 392.18(D) state about cable tray extension?
May be extended through partitions and walls
Must not be extended
Can only be extended horizontally
Should be extended with flexible materials
What is the purpose of cable trays as mentioned in NEC Section 392.16(C)?
Used as support for raceways under certain conditions
Used for decorative purposes
Used to conduct electricity
Used to store tools
What is the purpose of the threaded rod in the cable tray system diagram?
To support the cable tray
To conduct electricity
To insulate the cables
To provide lighting
Who must supervise the use of grounded metal cable trays as equipment grounding conductors?
Unqualified personnel
Qualified personnel
General public
Construction workers
What section of the NEC covers grounding and bonding for cable trays?
NEC Section 250.96
NEC Section 392.60
NEC Section 392.60(B)(2)
NEC Table 392.60(A)
What is the significance of NEC Table 392.60(A) in cable tray systems?
It lists approved cable colors
It specifies cross-sectional area requirements
It provides installation guidelines
It details maintenance procedures
