Answer / biren

In overhead line there is air around the bare conductor which is a insulation layer but the earth around the under ground cable is a good conductor. so there is more chance of insulation failure, hence to avoid the normal insulation failure more insulation is provided which increases the cost.

Answer / sk.azhar.m

An underground line is fill in the earth and when if the leakage current will flo in the erth the current rating will very high in the cable that is very dangerous for human and other and in the the overhead line the air is not good conductor of electricity while an underground line is more insulation than overhead line for this reason the insulation cost is more in underground system

What is meant by Resonance what are the different types of resonance and what are uses of them?

14 Answers   Infosys, NTPC,

---

How to calculate load taken by a cable?

3 Answers  

---

power generation unit kw/hr or kw/day ?? please answer me engr_kalam@yahoo.com

3 Answers  

---

what r the safety measures in UPS ? explain all?

0 Answers   Wipro,

---

what are the functions of fuse ?

1 Answers  

---

---

what is floating charger and boosting charger?

4 Answers  

---

what should be the minimum rating for using HT Motors?

1 Answers   BSL,

---

how we can decide that what value of ht line will come to any commercial building? (ans except According to the building load)

0 Answers  

---

what about the input current fan when regulator regulates to speed low?

1 Answers  

---

what parameters should we check to reduce the power bill

0 Answers  

---

why breather cap filled with oil?

7 Answers  

---

which motor is used in watch..??????

3 Answers   Bhushan ITI,

---