Answer / iamdon

The material of wire and the physical dimnsions are known.

1)From the physical property its resistivity(p)and melting
point can be found out(we need to depend upon techanical
specifications).

2)Resistance(R)of the wire can be calculated using the
relationship with the help of dimensional data
R=(p*l)/A where l=length of wire
A=cross sectional area of wire.
3)For a particular value of current(I)flowing through the
wire,the heat produced can be found by Joules law of
heating as
H=I*I*R.
4)Now we need to look into the ambient temperature in which
the wire is intended to work.After applying Newtons law of
cooling between allowable temperature of wire(considering
some factor of safety) and ambient temperature.We can find
current carrying capacity of wire.

Author:arbelectbit@yahoo.com

What is the difference between isolators and electrical circuit breakers? What is bus-bar?

0 Answers  

---

Difference between megger test equipment and contact resistance meter test instruments?

0 Answers  

---

what is the resistance value of earthing pit and why they are connected?

6 Answers  

---

can any one know is sbi interview based on merit or based on roll number

0 Answers  

---

What is the lower limit of megger value for 66/11KV power Transformer ?

7 Answers   MSETCL Maharashtra State Electricity Transmission Co Ltd, Torrent Power,

---

why we cant use AC supply products in DC supply?

21 Answers  

---

What is the minimum distance between taransformer (say 2000 kva)and its earth pit?

2 Answers   Bhel,

---

what is the difference between phase and neutral?

3 Answers   IAF, Indian Airlines,

---

Can I do body earthing of machine by using Cable armour or I have to run another GI wire for body earthing and how many wires I need to run. Is there any rule for this. eartnig

3 Answers   HAL,

---

22kV HT incoming should be 3 phase or 4 phase? why is it not 4 phase?

1 Answers  

---

what is thermal resistance of PVC Cable.

0 Answers  

---

What will be the effect if I use inverter as UPS mood?

0 Answers  

---