what is derating factor in Cable ? how we minimise this?
- 18 Answers
- 113102 Views
- Bhel, College School Exams Tests, I also Faced
- E-Mail Answers
Answer Posted / ameer reda
derating factor in the cable means reduction in the current carring capacity of the cable
there are many reasons :
1- ground temp derating factor
2-air temp dearating factor
3-burial depth derating factor
4-soil thermal resisvity derating factor
5-pvc rated temp derating factor
6-trefoil or flat formation derating factor for the three and single core cable laid direct in ground
7- trefoil formaion derating factor for multi core cables laid direct in the ground
8-reduction factors for groups or more than one multi core cable in air to be applied to the current carring capacity fore one multicore cable in free air
9-reduction factors for groups or more than one circuit of single core cables to be applied to the current carring capacity for one circuit for single core cables in free air
| Is This Answer Correct ? | 4 Yes | 0 No |
Post New Answer View All Answers
how much leakage current is allowed in MC61A L&T make relay?
How to define Kirchhoff current law and voltage law along with simply examples.
Does the motor power displayed on the Motor name plate is the mechnical power motor delivers or it is consumed power from the system?
What is pole of the system?
I want to do a mini project. Now I'm studying in 6th semis tor EEE Engineering.
What is time invariant system?
what will be happen if earth point is being used for as a neutral point for raw power , and same will be used for ups earthing
how to calculate the earth mat design in 132 kv substation yard ????
Which type of transformer is used for lighting loads?
how is the testing of an REF relay? what are the test REF circuit having?
Write a note on materials used as a fuse element.
how u measure/calculate renge of capacitor,capacitor has no any rating tag.what is the theory of measure of capacitons.
what is ratio of copper wire size and current ?
Why does amplifier gain reduce?
why do we carry out winding resistance test?
