IEC 60364 Standard

IEC 60364

IEC 60364 Standard

The IEC 60364-5-52 standard applies to low voltage cables rated less than or equal to 1 kV AC. and 1.5 kV DC. This standard applies to both underground and above ground applications.

Cable Raceway Installations

ETAP’s cable capacity calculation handles both above ground (A/G) and underground (U/G in duct and buried) installations:

  • A/G Conduit (thermally insulated wall, attached to wall, masonry, unventilated or ventilated channel)
  • A/G Trays (perforated, unperforated)
  • Air Drop (suspended, on insulators)
  • Architrave 
  • Window Frame
  • Building Voids (direct, conduit, cable ducting, ceiling, duspended floor)
  • Brackets
  • Chanel (open, ventilated)
  • Embedded Direct (thermally insulated wall, mouldings, masonry)
  • Ladder
  • Wire Mesh
  • Open & Clipped Direct (on wall, under ceiling, spaced from ceiling)
  • Trunking (on wall, suspended, flush floor, skirting, embedded)
  • U/G Duct
  • U/G Buried (direct, conduit)
  • Masonry (cable ducting)
  • Fixed Installation
IEC 60364 Cable Raceway Installation Types

 

Cable & Tray Layout

  • Flat layout – Touching or Spaced
  • Trefoil layout– Touching or Spaced
  • Horizontal layout
  • Vertical layout
  • Number of Trays
  • Circuit Clearance
  • Conduit External Diameter and Channel Depth
  • Spacing from Wooden Wall (based on cable overall diameter)

  • Alert for Allowable Capacity

    The alerts in ETAP can be based on the options listed below.
    • Calculated cable capacity
    • User-defined value
    • Thermal analysis results of underground raceway systems

    Grouping Factors

    The cable capacity simulation program for above ground (trays, air drop, and more) and underground (in duct and direct buried) calculates the current capability of a cable based on number of circuits as limited based on the standard.


    Soil Resistivity & Temperature Correction

    The soil thermal resistivity is an important thermal parameter for underground installations. ETAP computes the cable capacity based on the ambient and conductor temperatures. In addition, the user can enter the actual operating temperature of the cable and the current carrying capability will be adjusted accordingly.

     

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