monkey_man_100
Member
Where is the code that says, if you have move than three conductors bundeled you have to derate them. Are they talking about putting more than 3 14-2 romex together with a zip tie, or any situation?
No only if you have more than 9 current carring conductors total!monkey_man_100 said:Where is the code that says, if you have move than three conductors bundeled you have to derate them. Are they talking about putting more than 3 14-2 romex together with a zip tie, or any situation?
Where did you get that info?stickboy1375 said:He's talking about 334.80 Ampacity, but it is TWO NM cables containing two or more current carrying conductors are bundled together, AND pass through wood framing that is fire- or draft-stopped...
Even there in the worst case you would have 8 current carring conductors. Still not at a point where you need to derate!monkey_man_100 said:Ok, so say I have 4 14-2 NM running down a metal framed house, there is no problem straping them all down with one zip tie? I'm pretty new and here all kinds of things about how many wires you can put on one zip tie. I normally don't put more than 4 just because that is what I have been told.
chevyx92 said:Where did you get that info?
monkey_man_100 said:Ok, so say I have 4 14-2 NM running down a metal framed house, there is no problem straping them all down with one zip tie? I'm pretty new and here all kinds of things about how many wires you can put on one zip tie. I normally don't put more than 4 just because that is what I have been told.
monkey_man_100 said:Ok, so say I have 4 14-2 NM running down a metal framed house, there is no problem straping them all down with one zip tie? I'm pretty new and here all kinds of things about how many wires you can put on one zip tie. I normally don't put more than 4 just because that is what I have been told.
To each their own. I hate those things and prefer zip ties. I can't get stack-its tight enough for my taste.stickboy1375 said:Personally I think ty-raps end up way too tight on the wires...
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I would strongly recommand using these instead
stickboy1375 said:I would strongly recommand using these instead
monkey_man_100 said:Ok, so say I have 4 14-2 NM running down a metal framed house, there is no problem straping them all down with one zip tie? I'm pretty new and here all kinds of things about how many wires you can put on one zip tie. I normally don't put more than 4 just because that is what I have been told.
That what we usually used. A zip tie with a hole in the end for the screw, and a self-tapper. Didn't work so hot in tight bays, but much handier to carry around (50 at a time in my bags) than stand-offs.allenwayne said:I can`t see using zip ties to secure nm on metal studs.That would mean drilling holes to mount a zip tie in the center of the stud.To comply with 300.4 D.
georgestolz said:To each their own. I hate those things and prefer zip ties. I can't get stack-its tight enough for my taste.
Monkey man, the key is "bundled." If the AHJ considers NM under staples, zip ties or stackits running parallel over 2' 'bundled' (as they have every right to), then you must derate.
But, bear in mind with NM you derate from the 90? ampacity as the starting point. (334.80)
georgestolz said:That what we usually used. A zip tie with a hole in the end for the screw, and a self-tapper. Didn't work so hot in tight bays, but much handier to carry around (50 at a time in my bags) than stand-offs.
stickboy1375 said:Are you serious about a zip ty not being bundled? At least stack it's allow air flow around the wires... And thats the whole point, they should not be tight...