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grounding bus for ground strap #33017
01/10/04 01:25 PM
01/10/04 01:25 PM
ComputerWizKid  Offline OP
Joined: Sep 2003
Posts: 119
Connecticut, USA
How can I saefly make a direct ground point for my ground strap? I was thinking going to home depot and buying a spare appliance cord. 2. putting heat shrink tubing over the hot and neutral wires 3. putting it in a plastic project box and then soldering the ground wire to a big metal lug for my groung strap to clip on. is this a safe way?

Theres always enough room in the junction box.You just need a bigger hammer
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Re: grounding bus for ground strap #33018
01/10/04 02:32 PM
01/10/04 02:32 PM
DougW  Offline
Joined: Jun 2003
Posts: 1,143
North Chicago, IL
What kind of wiring system do you have in your house/apt?

Have you confirmed that the grounding terminal in your outlets is actually connected to ground?

If it is, and you have metal boxes, I would almost rather ground to a box itself than through a cord, where it relies on a wired connection. You could attach a small piece of copper pipe hanger strap behind the mounting strap of the receptacle, (using the receptacle mounting screws, and trimmed so it doesn't contact anything else, of course), and leave a tail hanging out from under the cover plate to attach your grounding clip to.

Re: grounding bus for ground strap #33019
01/10/04 06:25 PM
01/10/04 06:25 PM
Bjarney  Offline
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
Remember that the primary objective is to limit potential difference between you and the static-sensitive components you're working on. "Earth ground" is a secondary concern.

Re: grounding bus for ground strap #33020
01/10/04 08:07 PM
01/10/04 08:07 PM
ComputerWizKid  Offline OP
Joined: Sep 2003
Posts: 119
Connecticut, USA
House was built in the 1800's but completly guted/rewired with 200 AMP service spilt to the six apartments in 1999-2000 Each with its own sub panel

Theres always enough room in the junction box.You just need a bigger hammer
Re: grounding bus for ground strap #33021
01/11/04 12:23 AM
01/11/04 12:23 AM
wa2ise  Offline
Joined: Nov 2002
Posts: 785
Oradell NJ USA
I'd use a megohm resistor in between the ground and the strap. That way, if you touch something with line voltage on it, you will get less of a shock current thru your body. And the megohm resistor will drain away any static charge.

Re: grounding bus for ground strap #33022
01/11/04 01:53 PM
01/11/04 01:53 PM
hbiss  Offline
Joined: Dec 2003
Posts: 886
Hawthorne, NY USA
If you are working on a computer or other piece of equipment your wrist strap should have an alligator clip on the cord, simply clip it to the metal case. If you are working at a bench doing something like circuit board work you can connect your wrist strap cord to a receptacle ground using a bananna plug which will fit the in ground terminal ("hole") perfectly. Try Rat Shack not Home Despot.

The wrist strap should already have a high value resister in series with the cord to prevent electrocution.

[This message has been edited by hbiss (edited 01-11-2004).]


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