Answer Posted / farooq, nafees, hunjra, haral
For residential & small commercial buildings, Earth
resistance(E.R) should below 25 OHms(acceptable).
While, for industrial installations, It should below 1 Ohm
ideally, however, below 5 Ohms are also acceptable.
Is This Answer Correct ? | 15 Yes | 2 No |
Post New Answer View All Answers
what is dry and wet frequency withstand voltage? why & where it is used??
How would your past experience translate into success in this job?
Does magnetomonopoles exists? one maxwell equation strongly suggests no, but how about their existance in plasma?
define as synchronous generator
how to calculate voltage drop and followed by cable calculation?is there avail in formula?
how we sesign the transformer give some specifion regarding design of transformers
Could the power factor on electrical system can affect the registration of the kwhr meter or the CT/PT?
difference between ac series and parallel circuit
How can I known multiplying factor .without multiplying table
defination of controlled shunt reactor
how to measure the transformer resistance values(dyn11)?and howmuch the minimum value?
What will be the impact on motor performance if a LT motor is rewound with changed motor winding data as given below:- Original winding data: total 04 wires = 02 wires of 17 SWG + 02 wires of 16.5 SWG. Changed Winding data: total 03 wires of 15.5 SWG wire size Motor rating: 160KW, 740RPM, 415V, ID FAN application. Normal Running Current = 95% of FL Current.
Diagram and details of polarity test for Current Transformer 11kv 400/200/100/1A
How to design pavement quality concrete by using C.R.C.P Method
How the annunciator works ? How to do its wiring