Cable Tray Load Capacity Quiz

Which of the following is a factor in determining the load capacity of a cable tray?

• Method of painting the tray

• Method used to determine the allowable load

• Length of the cable tray

• Manufacturer's warranty

Which of the following is a factor in the load capacity of a cable tray?

• Spacing of rungs

• Color of the cable tray

• Manufacturer's logo

• Price of the cable tray

Which of the following is a factor in determining the load capacity of a cable tray?

• Method of supporting the tray

• Color of the cable tray

• Manufacturer's logo

• Price of the cable tray

What factors affect the load capacity of a cable tray?

• Color of the cables

• Shape and thickness of side rails

• Length of the cables

• Brand of the cables

What is the potential consequence of excess loading on the cable tray system?

• Improved performance

• Potential failure of the system

• Increased load capacity

• Enhanced stability

What type of failure occurs as bending failures and buckling failures?

• Longitudinal failures

• Transverse failures

• Vertical failures

• Horizontal failures

According to NEC Section 630.42, where may welding cable be installed?

• In any cable tray

• In dedicated cable trays only

• In hoistways

• In ducts or plenums

What section of the NEC covers the installation of welding cables?

• NEC Section 300.8

• NEC Section 392.10

• NEC Section 630.42

• NEC Section 392.12

What must be done if ferrous material is used in cable trays according to NEC Section 392.100(C)?

• It must be protected against corrosion

• It must be painted

• It must be insulated

• It must be replaced annually

According to NEC Section 392.60(B), what must the cable tray systems meet to be used as grounding conductors?

• All requirements in NEC Section 392.60(B)

• Only the size requirements

• Only the material requirements

• No specific requirements