ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
New tool
by gfretwell - 10/24/20 11:09 AM
Where is Everyone?
by Bill Addiss - 10/17/20 07:04 PM
New in the Gallery:
Facebook follies, bad wiring
FPE in Germany pt.2
Who's Online Now
0 registered members (), 16 guests, and 13 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
How dangerous is this? #31232 11/14/03 02:11 PM
Joined: Aug 2002
Posts: 1,691
S
SvenNYC Offline OP
Member
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
Re: How dangerous is this? #31233 11/14/03 02:39 PM
Joined: Sep 2001
Posts: 806
N
NJwirenut Offline
Member
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).]

Re: How dangerous is this? #31234 11/14/03 07:03 PM
Joined: Oct 2000
Posts: 2,721
Scott35 Online Happy
Broom Pusher and
Member
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!
Re: How dangerous is this? #31235 11/14/03 07:11 PM
Joined: Aug 2002
Posts: 1,691
S
SvenNYC Offline OP
Member
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]

Re: How dangerous is this? #31236 11/15/03 02:30 PM
Joined: Aug 2001
Posts: 7,520
P
pauluk Offline
Member
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.

Re: How dangerous is this? #31237 11/16/03 12:03 AM
Joined: Jul 2002
Posts: 8,337
Trumpy Offline
Member
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]


Featured:

2020 National Electrical Code
2020 National Electrical
Code (NEC)

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
lil suzi
lil suzi
Midwest
Posts: 57
Joined: August 2003
Show All Member Profiles 
Top Posters(30 Days)
Popular Topics(Views)
271,004 Are you busy
205,008 Re: Forum
193,124 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3