| Author |
Message |
jaz396
Joined: 16 Sep 2004
Posts: 18
|
 24 Sep 2004 13:00 How to make ground system ??? |
|
|
|
Hello guys ,
I think I have an ESD problem in my workshop , so I bought table mat and other strap and other anti-esd stuff. The problem is that those things need to be connected to a ground !
I dont have a ground in my electrical utility system . Can you sujest a simple way to make grounding system ?
thank you .
jaz
|
|
| Back to top |
|
 |
chinara
Joined: 15 Sep 2004
Posts: 96
Helped: 2
|
| 24 Sep 2004 13:24 Re: How to make ground system ??? |
|
|
|
| I think you may need a earth ground to escape the electron to the earth. Connectting the chasis to the earth maybe a way.
|
|
| Back to top |
|
|
daojx
Joined: 20 Jul 2003
Posts: 36
|
| 24 Sep 2004 13:25 How to make ground system ??? |
|
|
|
the ESD ground is a real ground wheret you are staying on, it is not relative to the ground
on electronics
|
|
| Back to top |
|
|
batdin
Joined: 03 Jun 2004
Posts: 181
Helped: 3
Location: Bulgaria
|
| 24 Sep 2004 18:06 Re: How to make ground system ??? |
|
|
|
| Connect it to a metal pipeline or central heating pipe.
|
|
| Back to top |
|
|
flatulent
Joined: 19 Jul 2002
Posts: 4856
Helped: 292
Location: Middle Earth
|
| 24 Sep 2004 19:28 Re: How to make ground system ??? |
|
|
|
| The "third wire" in your mains connection is earth. The ESD ground does not carry high currents so any size wire to a ground stake outside will also work. The problem with connecting to a metal water pipe is that any repairs will use plastic pipes and these will break the ohmic path to the earth.
|
|
| Back to top |
|
|
jaz396
Joined: 16 Sep 2004
Posts: 18
|
| 25 Sep 2004 18:08 How to make ground system ??? |
|
|
|
Hello ,
Thank you guys for help , especially flatulent .
Do I need to barry the earth into the soil ? what depth ? should I add salt or coak ( as some people sujested ) ?
In my workshop I have a 2.5m(hieght) x 3m(width) metal stack , is it wise idea to just connect the earth to it ?
Thanx.
|
|
| Back to top |
|
|
flatulent
Joined: 19 Jul 2002
Posts: 4856
Helped: 292
Location: Middle Earth
|
| 25 Sep 2004 18:59 Re: How to make ground system ??? |
|
|
|
| The ground for ESD does not carry high currents and can high resistance. All you have to do is use a short ground rod or a square of copper material buried. There is no need for special soil treatment unless you live in an arid desert.
|
|
| Back to top |
|
|
lvjrf
Joined: 25 Aug 2004
Posts: 19
|
| 30 Sep 2004 13:34 Re: How to make ground system ??? |
|
|
|
you can make an iron tube in the ground and around the tube
put water with salt (NaCl)
and if the ground is sandy put water every day
|
|
| Back to top |
|
|
delay
Joined: 11 Jun 2004
Posts: 219
Helped: 3
Location: Van Allen Belt
|
| 30 Sep 2004 20:14 Re: How to make ground system ??? |
|
|
|
The process described by lvrf is the way to make a proper ground.
You can also add coal in the six feet hole with salt and water. Then bring out a conductor to the primises and connect the third neutral wire to the conductor.
|
|
| Back to top |
|
|
golfbumb
Joined: 29 Sep 2004
Posts: 40
Helped: 5
Location: California
|
| 01 Oct 2004 18:45 Re: How to make ground system ??? |
|
|
|
This applies to the United States (at least):
In the U.S., the third (white) wire is NOT ground it is neutral. DO NOT ATTACH THE ESD WIRE TO THE THIRD WIRE IN YOUR PANEL as suggested by another post, without consulting a licensed electrician or registered professional engineer qualified in residential electrical systems registered in your state.
For informational purposes only, "The National Electrical Code," written by the National Fire Protection Agency, requires that on three wire systems (which it is assumed you have since you do not have a ground connection in the panel), the neutral conductor may be grounded with a local grounding conductor not smaller than the neutral conductor entering your service panel using a 3/4" trade galvanized pipe or a 5/8" galvanized rod, or a 5/8" copper rod, all not less than 8-feet long, or a two square foot plate electrode at least 2-1/2 feet deep or a water pipe with a continuous 10 feet of it in the ground within 10 feet of the panel. Gas lines as grounds are expressly forbidden by the NEC.
For ESD ONLY, keep it simple. If you cannot accomplish establishing a low impedance ground by attaching to the water supply line (at the source outside your house), only then add rods, pipes, or electrodes. If you leave sufficient excess wire in your ESD drain wire to connect to a rod, pipe, or electrode, if necessary, then you have not wasted any time. Only fool with the earth's chemistry or adding water daily or charcoal or the like as a last resort. Again, keep it simple.
If you choose to add a ground for anything other than ESD, then reread the first paragraph.
|
|
| Back to top |
|
|
platonas
Joined: 14 Aug 2004
Posts: 165
Helped: 5
Location: Universal Citizen
|
| 01 Oct 2004 21:23 Re: How to make ground system ??? |
|
|
|
I dont believe that electronics' people don't know where is the ground terminal of their mains supply. This is essential if you are going to connect/replace a plug of any appliance.
All mains supply systems have a ground connection. For the British system, it is the top hole of the socket, right is the live (hot) and left is the nutral. The ground is always different than the other two terminals. To avoid any accidents it has such a size and shape on the plug-socket pair that it is normally impossible to a plug (3 terminal one) in the wrong way.
To the question now. There are 2 simple methods to ground your bench:
1. Use the mains socket's groound (I consider the simplest).
2. Use your plumping pipe as a ground.
Certainly as some other people had suggested you could put a rod in soil and use it as a ground, but ... this is usually what your resident's electrical installation uses as a ground (in some cases is a direct connection to the electricity company's ground). Hence, I thing it is not needed to follow this method.
In case you want to follow it, there is no need to water the rot every day or month or whatever. Also there is no need to put salt (NaCl). The reason is, you only need to eliminate high voltages due to static electricity. These voltages are of a very low current magnitutes and the very high quality of earthing is not neccessary. Just good earthing. (unless you leave in a dry dessert)
|
|
| Back to top |
|
|
golfbumb
Joined: 29 Sep 2004
Posts: 40
Helped: 5
Location: California
|
| 01 Oct 2004 22:55 Re: How to make ground system ??? |
|
|
|
To Platonas,
Regretfully, you are poorly informed. The original post (jaz 396) stated that his/her panel does not have a ground. Apparently you missed that important fact. Instead you choose to insult him (and others) instead of reading his post carefully.
The person likely has a US pre-1960s home, which did not have grounds; just hots and neutrals. The 120V wall sockets in those homes only have two connections, period. There is no third connection. The neutral may be grounded somewhere upstream, but there is no guarantee of that. There are hundreds of thousands of homes in the U.S. without grounds and I have seen in several homes voltages of up to 30 Volts on neutral with respect to earth ground (including my last home!) until properly earthed.
Had you read the post before yours (also mine), you would have discovered that. So you insult me, as well.
Where involving lethal voltages, write responses only where informed or qualified. Defer that to professionals.
|
|
| Back to top |
|
|
jaz396
Joined: 16 Sep 2004
Posts: 18
|
| 09 Oct 2004 19:18 Re: How to make ground system ??? |
|
|
|
Yes ,golfbumb , you are absloutly right , my home has two connections only one is the hot line and the other is neutral .
Anyway , I started making new wire to act as an esd ground , as most of you suggested , and connected it to the water suply pipes out side of my home . Now , is there an easy (and cheap) way to test that ground path , because I have read many articles about the need of periodic ground and wrist strap testing . I think those equipment (ground &wrist strap tester )are expensive and better be used in IBM labs not in my old keitchen (now it is workshop ) .
thanx
|
|
| Back to top |
|
|
platonas
Joined: 14 Aug 2004
Posts: 165
Helped: 5
Location: Universal Citizen
|
| 10 Oct 2004 20:02 Re: How to make ground system ??? |
|
|
|
My appologies people,
I didn't mean to insult anyone by writing the above, I used this language just to emphasis that it is a familiar subject.
Also, it is the first time I heart that there is no earth in a house installation, it is something knew to me. Again my appologies for any bad commends I wrote.
Regards
P.
|
|
| Back to top |
|
|
