Answer / somdatt

Mr Prakash answer is right but upto a extent, but as size
of conducter increases, The current carrying capacity of
the cable decreases.
Also Correct current carying capacity of the cable can be
taken from the cable manufacturer.

Answer / k.prakashchandra

Generally, the current carrying capacity of copper cable is
taken as 2.5A/sq mm, and that of Al 1.5

Answer / jack

For 35mmsq size cable ,current anything more than 150
ampers is applicable.To find current use the formula P=VI
COSfi,WHERE COSfi=0.8 ,from this find current I,to find the
cicuit breaker size use the formula c.b rating =I(1.1-
1.25) ,this will give the ciucit breaker size,
Cuurent (amp) Cable Size (mmsq)

10 1.5
25 6
50 15
100 25
150+ 35

Answer / bhaskar

Current carrying capacity depends upon type of conductor and size&resistance &length of the conductor.
Eg:
Resistance of conductor is inversely proportional to cross section area of conductor and directly proportional to length of the conductor.
35 sq.mm cu cable can carry 130 amp
Current carrying capacity of cupper conductor is equal to 1.6 times of alluminium conductor in size.

4 sq.mm cu cable= 6 sw.mm am cable

Answer / abhishek

Copper wire conducts 1A/sqmm while Al wire conducts 1.2A/sqmm....Now 1.8A current is drawn by 1KW load..So for 45KW motor 80A is drawn....So 75sqmm of Copper cable & 65sqmm of Al cable will be reuired....

What is the operating principle of turbo-generator.

0 Answers  

---

Is current shock due to voltage or current? pls answer

2 Answers   ABB,

---

When measuring the Insulation resistance of a motor winding (winding to earth) using a megger meter, Applied voltage(1000V) was automatically reduced to 500V. and the measured insulation resistance values are also very low (in Kohm range) Can anyone give me a reason???

3 Answers  

---

limitation of conductor height on ground when we consider EMC

0 Answers  

---

Why earthing is required, and what effect in earthing result is more than 5 ohm and less than 5 or equal to 0 ohm

2 Answers  

---

---

what is load flow?

2 Answers  

---

when we connect a ceiling fan to a inverter's output voltage, it give some noise, why?

5 Answers   Luminous,

---

What is servo motor? what is its purpose?

0 Answers  

---

Why electrical engineer use Cu Strip for transformer neutral why not GI Strip? What if we use GI instead of Cu does it affects the transformer performance.

7 Answers  

---

How can you test the vector group of power transformers?

2 Answers  

---

Why GRR starts from 60% of motor speed why not less than 60%?

0 Answers  

---

How much current will a 5 HP delta connected motor at no load will take?Is tat need a starter

2 Answers   GRB,

---