Why red,yellow,green colours lamps are used in the traffic control?

2 Answers   Samtel,

---

how to calculate busbar size? if ex:1000amps i need to calculate busbar size and what size of bar?if any example caculation pls give the formulas.

2 Answers  

---

what is the ground fault relay,which purpose it will be use,clearly tell me plz

0 Answers  

---

WHAT IS A DIFFERENCE BETWEEN A DC GEAR MOTOR AND STEPPER MOTOR.AND WHICH IS MORE APPROPRIATE TO USE FOR POSITION CONTROL PURPOSE?

1 Answers  

---

ganaretors A check B check and C check details

1 Answers  

---

What type of DC motor would you see for a lift?

0 Answers   Ericsson,

---

What is the range of efficiency of thermal or steam power plants? Why it is so low?

2 Answers  

---

Post possible questions for Power Factor Panel FAT / SAT

0 Answers  

---

Can earth resistance be measured without connecting the earth electrode? and should earthing connections be disconnected What is the effect of connecting two cables of different sizes in parallel with supply? Thanks in Advance. I am intrested to get in touch with some tecnocrats/engineers,my mail i.d is : hiremathvijay@rediffmail.com

1 Answers  

---

what is the voltage between the earth & neutral 2 is there any continuity TO BE between earth & NEUTRAL

3 Answers   Suzuki,

---

what is fuction static switch in ups and tell me use parts name and fucion

3 Answers   Dalkia,

---

What is the fundamental cause of transients in power system?

3 Answers  

---