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lookingfored 06-18-2009 07:43 PM

zip tie to standoff's... 334.30 compliant?
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We are rewiring an old house that is built on 2.5" x 1.5" lumbar so, we can not staple the NM to the stud and maintain 1.25". We are using stand off's and zip tying the NM to the stand off. I am concerned that the zip tie will pinch the NM too much. The stand off's are 300.4(d) compliant, but are they 334.30? Attached a cell picture. What do you think? Thanks

HouseHelper 06-18-2009 08:08 PM

Too tight and you might choke off the electron flow:laughing:.

Seriously, why use the zip ties at all? the standoff is approved for use without them.

220/221 06-18-2009 08:51 PM


I am concerned that the zip tie will pinch the NM too much
Did you stop taking your medication? Your OCD is acting up again :yes:

Seriously, I'm not sure you could do any damage with a zip tie if you tried.

lookingfored 06-18-2009 09:48 PM

Lol... no crack here.. No, I am concerned about the edge of the zip tie cutting the sheathing of the NM. The ties have a bit of a "corner" on them and they must be tied at an angle (see picture). I guess the money question is, if you were an inspector would you consider it secured per 334.30? Thanks again.

theatretch85 06-19-2009 12:03 AM

Why do you even need zip ties if the standoffs are rated and listed for the purpose of securing the NM cable? What do the installation instructions for the standoff say? I'm sure it doesn't say to use a zip tie to secure the NM to the standoff....

ScottR 06-19-2009 10:41 AM

If you really wanted to be anal about it, you could use 2 zip ties -- one around the cable, perpendicular to its length, and the other going from the standoff through the first zip tie. Then you've got no angles and no bite.

Or slather the whole thing with electrical tape. :laughing:

Seriously though, I just looked at 334.30, and you're OK with cable ties, but it would be the inspector's call if you have them installed "so as not to damage the cable". Or if you need them at all.

Suzuki91vx800 06-19-2009 11:27 AM

if the stand off is approved for use with out the zip ties and it looks like they could cause damage he might even have you remove the zip ties

lookingfored 06-19-2009 12:10 PM

Everyone, thanks for posting. To be clear, the stand off's are 300.4(d) compliant. All that does for me is "protect cable when closer than 1.25" to the face of framing". The box the stand off's came in state that they are 300.4(d) compliant, but no mention of 334.30. It does however, also state that they "quickly secure multiple cables". My problem with thinking that they comply with 334.30 is that 334.30 states that cable running horizontally through framing is considered "secured" but, vertically it is not. Honestly, the cables are just as loose in the stand off's as they are in bored holes running vertical. This is why I posted, hoping for others with experience to enlighten me. :) Sorry for dragging this out. I hope you can see my reasons for concern.

HouseHelper 06-19-2009 06:22 PM

I use the stand-offs all the time when running 3 or more cables vertically along a stud. I never use zip ties and inspectors never have a problem with the installation.

Gary_602z 06-19-2009 09:30 PM

Mmm.. maybe call your inspector?


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