Min distance between runs of romex?

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  #1  
Old 03-11-05, 10:01 AM
Luis Rodriguez
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Min distance between runs of romex?

I'm pushing romex through metal studs in my basement (platic gromets in place). On one wall, I ended up running three lines of romex through the same holes (two lines are just going through that wall to the next room). It only occured to me after the fact that this might not be to code. Is this a problem?
 
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  #2  
Old 03-11-05, 10:23 AM
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How long (what distance) are these wires in parallel?
 
  #3  
Old 03-11-05, 10:30 AM
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Not a problem unless you tie the wires into a bundle with tie wraps or similar.
 
  #4  
Old 03-11-05, 10:44 AM
Luis Rodriguez
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About 24 feet. So they're ok if they're in a loose bundle but tiewrapping them is bad? What's the logic behind that?
 
  #5  
Old 03-11-05, 10:57 AM
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The problem is heat dissipation. Current running through wires makes heat. A small amount of heat is okay. A large amount of heat is NOT okay.

If you are running 24 feet together, through a stud every 16 inches or so, I would redo this, separating them into groups of no more than two together.

I would especially redo this if the wall is open and you can easily do so now.
 
  #6  
Old 03-11-05, 11:06 AM
Luis Rodriguez
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Ah. And tie wrapping them together would make the heat issue worse. I get it. Thanks.
 
  #7  
Old 03-11-05, 11:14 AM
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Bundling rules in conduit allow for 9 current carrying conductors before you need to derate. Ground is not a current carrying conductor. If you have 4 or less cables it won't be a problem.
 
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