IEC 60287 Duct Bank calculations

[alvarezo99]

Hi, i'm an electrical engineering student, i need to perform ampacity calculations for duct bank configurations (for each duct on the bank knowing the cable data) using IEC 60287 or Neher-Mcgrath, thing is i can't find some helpful examples on internet on the topic, i wanna ask is there anyone who has some information on the topic?
Sorry for my poor english btw.