Is it ok/safe to have a common ELECTRICAL EARTHING / Grounding, for various loads ?

Question

If I creat a EARTH GRID (by connecting 2mt. Cast-iron pipes dug in ground) around my new large area factory, and then keep on connecting various loads as and when they come, to this grid, instead of providing separate Earthing/Grounding for each one every time, will it be ok/safe ? As I have been told that any fault current generated by any one motor/load etc, will also damage the other loads instead of also being desipated to the earth via the grid ?

IS THIS TRUE ?

Since there is a physical connection between all the loads via the grid, will the short ckt. current or any other fault current of any one-load go to other loads also or to the ground only ?

What is a safe solution ?

Answer 1

no u hv to give a seperate earthing

Answer 2

dug other pipes as per the requirement of factory load.In the digged pipe coal & salt mixture should be put under the earth or in the pipe thaen connect with copper pipe start from deep pipe earth and then connect the wire from factory to earth wire in the digged pipe.This is the method  of earthing not only digging of cast iron pipe is sufficient.

Answer 3

One thing you must remember is that current does not try to go back to the ground, it just tries to make it back to its source. In most every case it is the separately derived source, the transformer.

Grounding for fault protection must provide a solid low impedance path back to the transformer. The National Electrical Code basically states that the earth shall not be used as the sole equipment ground.

Any electrode that you put into the earth must be bonded to the system neutral.

An electrode in the earth that is not bonded to the system neutral will NOT provide protection and will not trip a breaker simply because the soils impedance is too high to allow enough fault current to flow.

Of course there are exceptions to this such as an industrial plant using a resistance grounded system where an impedance is inserted between the ground and the system neutral. This will limit a single line to ground fault to just a few amps (usually 5A for a 480V service). Indicators are installed and will show when a ground fault is present allowing electricians to trace the fault down and remove it. This allows for greater service reliability. This arrangement however can not serve line to neutral loads.

Answer 4

You need to do what is required by your local and national electrical code.

If you do not know what this is, then you would be highly advised to hire an electrician.

If your wiring system is not in compliance with the code, you may create a dangerous situation. Even if if there is no immediate danger, you lay yourself open to all kinds of liability if anything goes wrong or someone gets hurt. In addition, your insurance can be canceled, and quite likely your municipality can deny or revoke your certificate of occupancy.

To answer your question, a safety earth ground must always have an uninterrupted path from the machinery to the grounding point. There must never be a switch, disconnect or fuse in the ground path. You must never use the safety ground as the return path for current under normal operation. The method to create the ground varies depending on your soil conditions, but cast iron is not used because of its brittleness and tendency to corrode. If the grounding system is properly designed, it will have a low enough impedance that the magnitude of current it can divert to ground will trip the upstream circuit protection before a dangerous or damaging potential is developed.  

Answer 5

If it is big FACTORY You seprate 5 or 6 Machines And give Seprate

EARTH it is VERY saftey for your machines and for the EMPLOYES

THE 2mt rod is very cheap no  

Answer 6

It is ok to use a common ground as long as it is capable of handling current loads from all attachments at the same time.

I question your use of a cast iron pipe.  Cast iron is not a strong material, may melt, splinter apart under load.

All common grounds I have seen are solid copper run to various depths into the ground, depending upon application. ( a minimum of four feet ).

A house will use a 5/8 rod and industrial applications get much thicker.  They are " solid " they are not a pipe.

Answer 7

erthling=persun from erth, as opposed tu alien from outter spaes

(littel green men)