Do you know how to measure the earth resistance? if so
explain it

Answer Posted / harold

You must use a car battery and a volt meter.Take the
battery out of your car and attach a cable to the positive
and negative terminals.Try and start your car,if it doesn't
start that means you have correctly removed the
battery.Stick one end of the positive cable in the
ground,the deeper the better,dig a hole with a shovel if
you have to.Stick the negative cable in the ground at
exactly 38.6390 inches away from the positive cable,this
measurement is extremely important.Now,wait 3 hours and
measure the voltage in the ground between the two cables.A
voltage of 7.75 volts dc or higher indicates proper ground
resistance of .00672 ohms.A lower voltage reading indicates
that the ground resistance is too high.Saturate the area
with water and wait overnight.Take your readings again the
next day and see if they have changed.This is a very
accurate method and it has worked for me every time.

Is This Answer Correct ?    1 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

why would amp draw on neutral wire be as much as amp draw on the hot leg.

1630


I have an existing old MCCB. ABB Model SACE, the rating are: Ue = 660 volts, Iu =1250 Amps, 3 poles, Ith (max) =800 amps at 45 deg C. I need a circuit breaker for my 3 phase motors, 380 volts 60 hz. the supplier required the minimum ampacity of the breaker to be 911 amps. can i use this breaker with rating of Iu =1250 amps but Ith = 800amps maximum?

1768


What are the different methodes for calculating the short circuit Current?

1491


what parameters should we check to reduce the power bill

1825


how to find out 3 phase complex power in per unit in unbalanced system?

1560






Air refrigeration cycle works on the

646


what is a composite error in current transformers, why occurs & in which it will occur i.e, either metering ct/ protection ct

1283


How to run a three phase motor into single phase........

1562


The simple way of finding the leakage quantity and % in compressed air distribution system

1189


What happens to a line-frequency of high-frequency transformer when it is first energized/ re-energize?

1712


how to get bearing & winding temperature of an induction motor?

1449


wHAT IS CAPACITANCE LATCHING? hOW TO CALCULATE CAPACITANCE LATCHING? hOW TO SOLVE THE PROBLEM IF CAPACITANCE LATCHING APPLIED?

1534


Scott connection is used for A 3-phase to 2-phase conversion B to achieve higher effciency C to save copper D to reduce harmonics

1859


one split ac how can told of this ac which Tr tell me us

1525


In aerodynamic turbines which element is NOT there a.stator b.compressor c. Fuel intake system d.fans

1623