YEN LE COMPANY LIMITED

Cable tray system and electrical enclosures

Tax code: 3700 919 919 - Address: 16th Floor Becamex Tower, No. 230 Binh Duong Avenue, Binh Duong Province, Vietnam

Cable tray system selection guide

Definitions

  • The dimensions are in mm
  • OD: Outer Diameter
  • OD1...ODn: Outer Diameter no.1...n
  • ODmax: Maximum outer diameter
  • m1...mn: No. of cable 1...n
  • d: Distance between each cable
  • S: % spare capacity
  • TOD: Total Diameter of all cables laying in tray
  • TW: Total width of all cables laying in tray
  • TS: Total area of all cables laying in tray
  • F: % fill ratio 40% ÷ 60%
  • SC: Cable tray section area
  • R: Radius of fitting

Calculations

TOD = OD1*m1+ ... +ODn*mn

TW = (TOD+d*(m1+...+mn))

TS = (TW*ODmax)*(1+s/100))

SC = TS*(1+F/100)

Choose available height (H)> ODmax -> Available width (W) > SC/H

R = 10*ODmax

Example

Cable tray for d=5mm, S=20%, F=50% and cables list below:

  • Cable CVV 240mm2 -> OD=26.6mm. Quantity = 3 cables
  • Cable CVV 185mm2 -> OD=23.8mm. Quantity = 1 cable
  • Cable CVV 95mm2 -> OD=17.9mm. Quantity = 3 cables
  • Cable CVV 50mm2 -> OD=13.9mm. Quantity = 4 cables
  • Cable CVV 16mm2 -> OD=9.6mm. Quantity = 2 cables

TOD = 26.6*3+23.8*1+17.9*3+13.9*4+9.6*2 = 232.1

TW = 232.1+5*(3+1+3+4+2) = 297.1

TS = 297.1*26.6*(1+20/100) = 9483

SC = 9483*(1+50/100) = 14225

Cable tray with H = 50 -> W = 14225/50 = 284.5 -> Select H = 50mm, W = 300mm

Cable tray with H = 100 -> W = 14225/100 = 142.25 -> Select H = 100mm, W = 150mm

R = 10*26.6 = 266 -> Radius of fitting R = 300mm

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