inspectorparker
Member
Can you staple romex to the sub-floor? If not, how close may you run wire to the sub-floor if stapled along side a floor joist?
subtract the thickness of the subfloor from 1 1/4", that's how far down you are supposed to be.
Can you staple romex to the sub-floor? If not, how close may you run wire to the sub-floor if stapled along side a floor joist?
No. 300.4(D). If stapled along the joist, at least 1.25" from the edge. iow,
there needs to be a minimum of a 1.25" gap between the sub floor and the romex.
Hey Bob isn't it 3/4" in Mass. I thought there was an amendment?
No, that is not what 300.4 says.
I'm confused then: if installed by 300.4(D), as a result wouldn't there be a 1.25" or more gap between the bottom of the subfloor and the near edge of the romex? Or are you saying there can be a smaller gap because of places where nails aren't likely to penetrate the wires?
What I am saying is that 300.4(D) requires the NM to be no closer then 1.25" from the edge of the farming member, not the floor. That being the case as long as you stay 1.25" away from the framing member you could staple to the sub-floor.
The measurement is based on the distance to the joist not the distance to the any part of the floor.
334.15(b) protection from physical damage. Cable shall be protected from physical damage where necessary by rigid metal conduit, intermediate metal conduit, electrical metallic tubing, schedule 80 pvc conduit, or other approved means. Where passing through a floor, the cable shall be enclosed in rigid metal conduit, intermediate metal conduit, electrical metallic tubing, schedule 80 pvc conduit, or other approved means extending at least 150 mm (6 in.) above the floor.
Where was the mention in the op of the possibility of physical damage? Or is all nm that is exposed subject to physical damage?
Yes, MA changed 334.17 down to 3/4"
You got to be kidding
who in there right mind would change it to ?":roll: