ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

ECN Shout Chat
Top Posters(30 Days)
Admin 16
Recent Posts
fuse rejectors
by gfretwell. 03/23/17 01:12 PM
Another Forum Update
by Admin. 03/22/17 03:04 PM
Dining room plugs
by watersparkfalls. 03/21/17 10:31 PM
TRUE POWER
by jraef. 03/21/17 09:13 PM
WEG CFW-11 Frequency Inverter
by jraef. 03/21/17 08:50 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
231,239 Are you busy
165,949 Re: Forum
160,476 Need opinion
Who's Online Now
1 registered members (TheShockDoctors), 88 guests, and 14 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#31232 - 11/14/03 02:11 PM How dangerous is this?  
SvenNYC  Offline
Member
Joined: Aug 2002
Posts: 1,691
New York City
I've got this wrist-grounding strap (a conductive strip of material with a wire and an alligator clip attached) that I use for grounding myself when I'm working on some solid-state stuff on my workbench (like replacing a card on a computer or diddling with an electronic clock radio).

Anyway....since I have a grounded socket strip on my workbench, how safe would it be to attach the wire of my grounding strap the the ground pin of an old male plug and then stick that sucker into the socket? Assume socket is wired correctly I'm assuming no problem....but still.

Usually I just clamp the thing to the metal casing of the power strip...but clip pops off sometimes....


Work Gear for Electricians and the Trades

#31233 - 11/14/03 02:39 PM Re: How dangerous is this?  
NJwirenut  Offline
Member
Joined: Sep 2001
Posts: 806
Bergen County, NJ
That's what I do with mine, with no problems. And I have seen grounding straps (3M, IIRC) provided with a plug intended for this purpose. The plug had 2 plastic blades and a metal ground pin. I would be a bit leary about using a setup like that out in the field, where the wiring/grounding integrity of the outlets is unknown, though.

For safety, a wrist strap MUST incorporate a high value of resistance (usually 1 megohm) in series with it, so you aren't making a direct connection to earth ground anyway. Just enough of a path to drain away static charges.

[This message has been edited by NJwirenut (edited 11-14-2003).]


#31234 - 11/14/03 07:03 PM Re: How dangerous is this?  
Scott35  Offline

Broom Pusher and
Member
Joined: Oct 2000
Posts: 2,707
Anaheim, CA. USA
Like NJWirenut said, most Grounding Wrist Straps for draining / eliminating ESD have a 1 Megaohm Resistor in series, so the user doesn't become a conductor.
(not a train conductor! [Linked Image]...hee hee hee)

Just make sure yours has a high Resistance too!

Scott35


Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!

#31235 - 11/14/03 07:11 PM Re: How dangerous is this?  
SvenNYC  Offline
Member
Joined: Aug 2002
Posts: 1,691
New York City
Thanks guys!!

Yes, this little strap does have the resistor spliced in series with the strap and the wire.

I don't plan on using this anywhere but my own bench. That way I KNOW what I'm plugging it into. [Linked Image]


#31236 - 11/15/03 02:30 PM Re: How dangerous is this?  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
I use of on those when working on MOS devices too. As the others have said, the high value resistance in series is an essential guard to your safety if you did ever accidentally touch an energized part with your other hand.

I have a regular banana plug on mine which will fit the grounding posts on many items of test equipment. It fits just nice in the ground hole of the NEMA 120V receptacles on a power strip too.


#31237 - 11/16/03 12:03 AM Re: How dangerous is this?  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,211
SI,New Zealand
My part of the workshop at work has an ESD safety area in it, with a big grounded safety mat, strap and multiple bonding points on it as well as an ESD safe Soldering Station.
You just can't be too careful with Electronic Equipment.
I've seen really expensive controllers ruined by idiots that don't take the simple precaution of wearing a static strap. [Linked Image]


Let's face it, these days if you're not young, you're old - Red Green grin


Member Spotlight
lil suzi
lil suzi
Midwest
Posts: 57
Joined: August 2003
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.018s Queries: 14 (0.004s) Memory: 0.7759 MB (Peak: 0.9198 MB) Zlib enabled. Server Time: 2017-03-23 18:14:28 UTC