Interested to Buy Any Domain ? << Click Here >> for more details...
What is the permissible value of earth resistance!
- 11 Answers
- 38058 Views
- Torrent Power, I also Faced
- E-Mail Answers
Answer Posted / rajkumar.d
There is a good deal of confusion as to what constitutes a
good ground and what the ground resistance value needs to
be. Ideally a ground should be of zero ohms resistance.
There is not one standard ground resistance threshold that
is recognized by all agencies. However, the NFPA and IEEE
have recom- mended a ground resistance value of 5.0 ohms or
less.
The NEC has stated to “Make sure that system impedance to
ground is less than 25 ohms specified in NEC 250.56. In
facilities with sen- sitive equipment it should be 5.0 ohms
or less.”
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
whit is 33kv power 300*300 cable full current with formula
how we explain parallel paths armature winding?
what is doid
WHY THE DIMENSION OF TWO SAME RATED MACHINE IS DIFFERENT ?
what is fault level of power system ?
can you please send me the technical questions and aptitude questions of honeywell and jindal steel electrical engg. question paper my e-mail ID is(kkesavanraj@gmail.com)
Define reserve-generating capacity?
Actually I have a doubt on neutral and earth.we use Ac power without taking neutral by connecting to earth,but at that time does it affects on efficiency of any electrical components or no? If yes how?
Explain the iniluencc of short circuit ratio on the pert'orniancc of synchronous machine.
why servomotor motor? where i apply for best output?
Why we use auxillary relay ? what is function of differential relay, directional o/c relay?
i want some interview related questions with their answers which can help for attend the interviews...
What is difference and reason b/w -48V BTS system and 24 V BTS system. Plzzzzzzzzz tel me.
can we conduct the swineburne's test on a dc series motor? why?
What is Anemometer used to measure?
