Where in the codes doe it state what kind of sheathing is required for wiring through floor joists? I am going to pick a wire to run 220. I assume that single wires coated with plastic is not to code, when I say single wires I am referring to.typical house wiring, white and yellow Romex NM-B Cable, ie the three wires inside it, a bear copper wire and two covered wires and paper. When running wires through joists what is the code configuration? Is sheathing always required, I would assume it is.
If you mean where passing through a floor, the Romex cable must not only have sheathing but shall also be enclosed in rigid metal conduit, intermediate metal conduit, electrical metallic tubing, Schedule 80 PVC conduit, Type RTRC marked with the suffix -XW, or other approved means and extending at least 6-inches above the floor. NEC 334.15.
If you mean running through floor joists (horizontally) then of course, the wiring requires sheathing. If there isn't sheathing, then it's not an approved wiring method, per NEC.
"If you mean running through floor joists (horizontally) then of course, the wiring requires sheathing. If there isn't sheathing, then it's not an approved wiring method, per NEC."
Thanks Nick, do you know where that code is found in NEC? I looked at 70 / 300.22 C 1 , but I am not sure if that is what you are talking about or not. Do you know where the code is for that, do you have the reference numbers? Thanks.
Chapter 3 - Wiring Methods and Materials.
300.3 Conductors.
(A) Single Conductors. Single conductors specified in
Table 310.104(A) shall only be installed where part of a
recognized wiring method of Chapter 3.
thanks Nick! My block head son in low thinks he can get away with his bus electric work in the house.
Always glad to help.
Actually many installers need to be reminded -
THE YEAR...
IS
2019!!!
Happy New Year! If you know someone with outdated code books, the 2017 NEC makes a great gift !
If you mean where passing through a floor, the Romex cable must not only have sheathing but shall also be enclosed in rigid metal conduit, intermediate metal conduit, electrical metallic tubing, Schedule 80 PVC conduit, Type RTRC marked with the suffix -XW, or other approved means and extending at least 6-inches above the floor. NEC 334.15.
If you mean running through floor joists (horizontally) then of course, the wiring requires sheathing. If there isn't sheathing, then it's not an approved wiring method, per NEC.