Answer / suresh.m

For 800A We Can Use 2R X 3.5CX300Sqmm.Al.Ar Cale But As Per
T.N.E.B We Should Use 3RX3.5CX 400Sq.mm Al.Ar.Cable.
Consider 1 Amp=1Sqmm For Aluminum Cable For Safety And
Starting Current We have to Consider 1.5 Times the Rated
Current that means 800*1.5=1200A

Answer / parthasarathy

There is lot things we have an eye for choosing the cable selection for higher load.
Cable is of two types - copper and aluminium.
For aluminium cable at 800 amps load
We need to lay about 2Rx 400 square.mm Al. AR. Cable is enough ,more than we have an eye for how much length of the cable should lay.
For copper cable- 2Rx 240 square.mm copper flexible cable is enough.
Load is major constrain for cable laying and distance of cable also play a role.

What is the difference between body earthing and neutral earthing?

2 Answers  

---

What is Magnetic Current Test of Transformer.

2 Answers  

---

What is GIS Substation and how it operate? where these type of substation installed?

8 Answers   Power Grid,

---

What is application of MCB & How it works

1 Answers   TATA,

---

what is a diffrence between MCCB, RCCB, MCB, & ELCB ? what is rated current e.g. on motor name plate indicated that is rated curent? what is full load current? If we run D.C. motor with mechanical coupling and we measure voltage on terminal it shows voltage or not ? same in AC also possible ?

5 Answers   Reliance,

---

---

why transformer tank is in rectangular shape what happen when it is in step shape

0 Answers  

---

List of equipments required foe industrial repair lab.

0 Answers  

---

what is the exact meaning of power

1 Answers   SKB,

---

Why does increasing the magnetic flux in the main field of a d.c motor cause the armature current to reduce??

0 Answers  

---

why insulators are colured in brown only?

3 Answers   Transco,

---

what is transformer

7 Answers   Hofincons,

---

if field current decreases how can the speed increase in the unloaded dc series motor

1 Answers  

---