how to determine the size of power cable according to load current



how to determine the size of power cable according to load current..

Answer / sudhakar g

First we have to calculate the load details
Ex: for 100 kw load

I=(kw*1000)/(p.f* 415v*1.732)
=173A

For cable manfacutrer they give the list of for these amp
how much cable we have to lay

If u want to calculate means u have to consider
1) derating factor
2) temprature coffiecent factor
3) kfactor

Is This Answer Correct ?    6 Yes 1 No

Post New Answer

More Electrical Engineering Interview Questions

what is the difference in operation of 3 phase motor when am forward delta connection and reverse delta connection?

1 Answers   Birla,


why we used capacitor in induction motor?

4 Answers   Mitsubishi,


what is the formula of starting current of 3phase and 1 phase motor???

0 Answers   L&T, WFP,


Off-circuit Tap changers in distribution transformer required

1 Answers  


explain the Trip supervision circuit

0 Answers   NCC,






which is better VCB or ACB and why?

7 Answers  


What is short circuit analysis of electrical networks?What are the procedures to be followed for its calculation?

2 Answers   DLF,


how we will deside the high voltage value

0 Answers  


Why is ignitor used in sodium vapour lamp

1 Answers  


what are earthing material

1 Answers  


why magnetising curve not start with zero voltage?

0 Answers   TATA,


How we can find the regulation of transformer?

2 Answers  


Categories
  • Civil Engineering Interview Questions Civil Engineering (5085)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4451)
  • Electrical Engineering Interview Questions Electrical Engineering (16632)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1095)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (239)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (259)
  • Instrumentation Interview Questions Instrumentation (3014)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (124)
  • Power Plant Engineering Interview Questions Power Plant Engineering (172)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (25)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)