Information and Installation Instructions for UL and CSA cables

• Inside switchboards, flexible single conductor cables must be installed in cable channels of plastics
  
• As American cables are not so flexible, the minimum bending radius must be taken into consideration during flexible installation.

• Permissible tube and conduit ø: minimum-Ø = 1/2“ (inch) maximum-Ø = 4“ (inch)
  Minimum wall-thickness of the conduit = 1.9 mm
  
• Normal steel armored tubes with transition socket PG-NPT is used. Further metal cable channels must also be used.
  
• The cables are permitted to be filled with only max. 50% cross-section of the cable channel.
  
• Flexible single conductors must be installed in PVC tubes inside the conduits.
  If connectors are used, both the main and the control cables should be installed separately.

• PVC tubes
  
• Metal tubes and glands
  
• Fixing material
  
• Steel armored tubes.

• Cable channels in switchboards must be made out of  flame resistant PVC and must have enough spare space.
  
• Cable channels on machineries and equipment must be made out of metal. They must also be closed and oil resistant.

• Cable identification is achieved through continuous numbers, letters or number/letter combination. The beginning and end of the cable have the same identification system.

• Main and Control cables
  It is depending on the type of connection to the apparatus if screw or press clamps are used.
  
• In USA, it is normal to install cables without using cable lugs or cable crushing socket. The connection is only possible with the UL-wires sizes. These sizes are not designed with fine wire stranding make-up.

Color identification

• Black
  For main circuits, control- and sub-circuits, direct connected to main voltage.
  
• Blue
  For direct voltage- (d. c), control- and sub-circuits, which are connected to the main circuit.
  
• Red
  For alternating voltage (a. c.), control and sub-circuits.
  
• Yellow or brown
  For interlock circuits from an external power source.
  
• White or gray
  For current conveying earthed conductors at main, control and sub-circuits.
  
• Green or green-yellow
  For insulated ground-connectors as protective conductor.