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Cable calculation exercise

Discuss Cable calculation exercise in the Electrician Courses : Electrical Quals area at ElectriciansForums.net

CristiP

CristiP

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can anyone help me with this problem ? i don't understand it
ive triend to get involved in it but still i don't get it
thanks[ElectriciansForums.net] Cable calculation exercise
 
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It sounds like you are being asked to calculate required values for the cable to determine whether it will be complaint or not, e.g. suitably sized cable meeting correct values for protective device etc, and I'd not complaint state why.
 
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CristiP said:
can anyone help me with this problem ? i don't understand it
ive triend to get involved in it but still i don't get it
thanksView attachment 104952
Click to expand...
It's telling you to run the entire design calculation;
  • Coordination - Ib <= In <= Iz <= It
  • Volt Drop
  • Adiabatic Thermal Withstand
  • Ipf
  • Actual disconnection time.

And highlight if it fails at any point in the calculations and if it does; a suitable remedy.
 
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Lister1987 said:
It's telling you to run the entire design calculation;
  • Coordination - Ib <= In <= Iz <= It
  • Volt Drop
  • Adiabatic Thermal Withstand
  • Ipf
  • Actual disconnection time.

And highlight if it fails at any point in the calculations and if it does; a suitable remedy.
Click to expand...
it is even less than ib , what should i do next ?
 
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Go over all your steps again and see where you've gone wrong or post your working out on here, we will help but not answer it for you
 
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