Answer / habeebm

Yes we have formula.....

Power P =400KW, Length L =50 Mtr, Voltage V =415V

ANSWER:-------

First find current,

Current I= 695.65A

Apply the factors in the below mentioned formula:-

R = pL/a

Where R=Resistance, p=Resistivity, L=Length, a=Area

Since p=12 for Aluminiun and 14 for Copper.

Then, R= pL/a

We know that V=IR

Apply "R" in Ohms Law

V = IR

V = I pL/a

Therefore ,

Area "a"= (IpL/V) / 1.732 (since 3 phase)

a = (695.65 x 12 x 50 / 415)/1.732

a = 580.69 ( Approximately 600 Sq.mm )

a = 600 ( 2 x 300 Sq.mm)

Therefore 2R, 3.5C X 300 Sq.mm cable is required.

Answer / noob

wat does 2R mean?
how did u get V = 415v?
50 meters is the length of wat?
the wire? the load?

what is load cell

3 Answers   TATA, Wipro,

---

what is resver in electrical enginnering with answer

0 Answers  

---

Wtat is vaccum currcuit breaker.define with cause of used.and where be use it Devise .

1 Answers  

---

why the starting current of a motor is high?

3 Answers   ITC Infotech,

---

what is the difference between line & phase current in star delta connection motor?

2 Answers  

---

why use generator Earthing/Graunding.

4 Answers  

---

What is mean by diversity Fator?

7 Answers  

---

what is mean Boost voltage and what is working principle of Tube light

2 Answers   Trimax,

---

As we know diode work on both negative and positive but converting ac into DC we have to given a/c from negative of diode or positive side.please give me answer.

0 Answers   cpgn,

---

How to reduce -234126219.6403 MVAr generation and by what?

0 Answers  

---

while conducting an experiment why we connect the armature rheostat in maximum position and field rheostat in minimum position

1 Answers  

---

what is the iron loss in a 11KV/440V transformer?

2 Answers   Bhel, TVS,

---