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re: 406.9(B)(1) - Ground Screw #82364
11/05/02 11:07 PM
11/05/02 11:07 PM
Mike_Riverside  Offline OP
Joined: Aug 2002
Posts: 33
406.9(B)(1) a non colored #10 tek screw ok?

i dont think so, but the foreman says yes.

also are #10 tek screws ok for securing meter base covers? (others were using these screws instead of the screws the equipment came with (square d 5 meter - meter bases))?

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Re: re: 406.9(B)(1) - Ground Screw #82365
11/06/02 08:41 AM
11/06/02 08:41 AM
resqcapt19  Offline
Joined: Nov 2000
Posts: 2,148
406.(B)(1) applies to the screw that is factory installed on the yoke of a receptacle. Are you removing and replacing this screw with a tec screw? Did you intend to refer to 250.8? If so I would classify a tec scre as a sheet metal screw.
In my opinion the screws provided by the manufacturer are requied to be used on the meter cover.

Re: re: 406.9(B)(1) - Ground Screw #82366
11/06/02 10:34 AM
11/06/02 10:34 AM
jlhmaint  Offline
Joined: May 2002
Posts: 202
Fredericktown, OH, U.S.A
I have been told the same as you Mike_Riverside. But i always do it my way with the equipment that came with it or drill out and use a regular nut and bolt.

same with hanging conduit alot of guys at our shop will secure the one hole straps using TEK screws. and i disagree with them i just don't trust TEK screws for these types of applications, they strip out easy and tend to come loose over time. I always hang using my Unibit and nut and bolts takes little longer but i trust it.

Re: re: 406.9(B)(1) - Ground Screw #82367
11/07/02 07:41 PM
11/07/02 07:41 PM
John Steinke  Offline
Joined: Apr 2001
Posts: 518
Reno,Nv., USA
Opinions are like fingers- most of us have a handful of them!
I say that any screw that threads into the correctly sized hole for its' threads is OK. Therefore, a Teks screw is ok, as it drill the right size hole. An ordinary sheet metal, or dryall screw, that just happen to 'fit' into an existing hole is NOT ok.
Of course, both Joe Tedesco and Mike Holt disagree with me on this.
I do hope that someone brought this up for the 2005 code!

Re: re: 406.9(B)(1) - Ground Screw #82368
11/07/02 08:24 PM
11/07/02 08:24 PM
sparky66wv  Offline
Joined: Nov 2000
Posts: 2,236
West Virginia
I've never seen a green tek screw...

Do you paint it? Green Sharpie?

"...not readily removable..."


[This message has been edited by sparky66wv (edited 11-07-2002).]

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Re: re: 406.9(B)(1) - Ground Screw #82369
11/08/02 06:20 AM
11/08/02 06:20 AM
Electricmanscott  Offline
Joined: Jan 2002
Posts: 1,457
Holden, MA USA
The NEC says nothing about the screw size and hole nor does it specify specific types of sheet metal screws. It simply says sheet metal screws shall not be used. A tek screw is a type of sheet metal screw and not a "listed means" therfore it is a violation.

Re: re: 406.9(B)(1) - Ground Screw #82370
11/08/02 06:44 AM
11/08/02 06:44 AM
Joe Tedesco  Offline
Joined: Oct 2000
Posts: 2,749
Boston, Massachusetts USA

For your information, I already sent in a proposal for an earlier code to clarify the "sheet metal screw" subject, asking for machine threads and it was rejected for some reason I cannot remember.

[This message has been edited by Joe Tedesco (edited 11-08-2002).]

Joe Tedesco, NEC Consultant


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