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Re: Tie wraps [Re: harold endean] #203779 10/24/11 12:07 PM
Joined: Feb 2002
Posts: 2,233
H
harold endean Offline OP
Member
John,


330.30 states that "MC cable shall be supported and secured by staples, cable ties, straps,hangers, or similar fittings..."

Like I said, the EC might have a hard time finding something from the manufacture that says it is listed and labeled for the application.

Also as Electure said, Most inspectors don't care their use.

Work Gear for Electricians and the Trades
Re: Tie wraps [Re: harold endean] #203782 10/24/11 12:44 PM
Joined: Jul 2004
Posts: 9,571
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gfretwell Offline
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Thomas and Betts invented the Tywrap and I looked on their site for the installation instructions but that document 404's
I have a question into the support desk.

I did find this in the FAQ

Quote

Which of your cable ties are plenum rated?

All of our UL listed standard Ty-Rap brand cable ties are plenum rated. This includes the colored ties. The black weather resistant ties are not listed for plenum applications. The Catamount brand ties are not listed for plenum applications.


So I guess there are U/L listed tywraps but you would have to see the bag. If these are no name Chinese ties, who knows?


Greg Fretwell
Re: Tie wraps [Re: harold endean] #203787 10/24/11 01:40 PM
Joined: Apr 2002
Posts: 7,235
HotLine1 Offline
Member
Harold:
The only thing I ever saw on a bag of Ty-Wraps (T&B) was something to the wording of flame/smoke spread, that was on a bag of 'purple' or 'maroon' T&Bs; that was at least 5-7 years ago at a car dealer new bldg.

Telco/data guy had them; EC went to pick up some at Cooper...till he found out the $$$; he came back with ss ty-wraps; no issues.


John
Re: Tie wraps [Re: harold endean] #203791 10/24/11 05:40 PM
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gfretwell Offline
Member
I looked over a bunch of the bags for Gardner Bender cable ties today at a box store and they all seem to be "recognized" (UR) but none showed a listing mark.

Still no answer from T&B


Greg Fretwell
Re: Tie wraps [Re: gfretwell] #203793 10/24/11 09:01 PM
Joined: Nov 2007
Posts: 763
K
KJay Offline
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Now that you mentioned it, I never really noticed it before, but I have a couple of bags of the Band-It stainless ties that I know are UL listed, but they only say it on the instruction sheet that comes inside the bags. Nothing at all on the ties themselves. You’d think that if they went to all the trouble of getting them listed that they would slather it all over them. I guess if anyone ever calls me on it I will have to dig one of the bags out of the trash.

I also have a bag of those nylon standoffs that you put a screw in the middle and run the tie through the slots. Nothing marked on those either, so I guess you have to check that any accessories like that used with plenum rated ties are also rated.

Re: Tie wraps [Re: KJay] #203796 10/24/11 09:34 PM
Joined: Oct 2000
Posts: 5,389
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sparky Offline
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i had thought i;'d read some manner of UL sanctioning for tie wrap's inclusion towards means of securement.....

~S~

Re: Tie wraps [Re: harold endean] #203797 10/24/11 09:56 PM
Joined: Jul 2004
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gfretwell Offline
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Here is a link to a power point about the U/L listing standard for cable ties. I imagine we should be looking for a listing mark if we really want to follow the letter of the law.
http://www.nema.org/prod/be/cable-ties/upload/New%20UL%2062275.ppt

This is the NEMA article
http://www.nema.org/prod/be/cable-ties/

I am not sure you know whether the ties you see come from the "golden bag" the guy has been carrying in his truck for a year.


Greg Fretwell
Re: Tie wraps [Re: harold endean] #203823 10/26/11 09:40 AM
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harold endean Offline OP
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It seems to me that there can be a lot of fuss over very small items in the code.

Re: Tie wraps [Re: harold endean] #203826 10/26/11 09:54 AM
Joined: Jan 2005
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renosteinke Offline
Cat Servant
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Code aside .... IMO tywraps are 'temporary.' Even indoors, give them a few years and they become as brittle as glass.

Again, we're finding that one size does not fit all. What might be fine for hanging a few phone lines from the steel trusses above a drop ceiling might not be so smart when you're hanging a 12-pc bundle of #8-3 MC or 4" EMT.

Re: Tie wraps [Re: harold endean] #203832 10/26/11 01:07 PM
Joined: Jul 2004
Posts: 9,571
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gfretwell Offline
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It is fairly easy to argue that strapping cables in walls is just to keep them away from the rockers and serve little purpose after the rock is up. After all we can fish cables after the rock is up and the code is OK with that.
All ty-raps are mot created equal tho. I have some that seem to last forever and others that get brittle pretty fast. The problem is they all look the same. It should be noted that the T&B site said the U/V protected ties are not plenum rated. That might be important when you are using them in air handling spaces.


Greg Fretwell
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