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  1. #1
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    foil flex and electrical code

    Does foil flex touching 12/2 or 10/2nm wiring constitute a violation of the electrical code?

  2. #2
    Join Date
    Dec 2005
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    Cincinnati, Oh
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    Quote Originally Posted by ironpit View Post
    Does foil flex touching 12/2 or 10/2nm wiring constitute a violation of the electrical code?
    If it does, it's none that I've ever heard, or enforced.
    You should see some of the apartments I do. The sofits are so small, our flex (silver foil) touches wire almost all the way from the panel, to the outlets.
    "Better tell the sandman to stay away, because we're gonna be workin on this one all night."

    "Dude, you need more than 2 wires to a condenser to run a 2 stage heatpump."

    "Just get it done son."

    Dad adjusted

  3. #3
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    i haven't been tagged on it yet, but I aways take pain to keep it two inches or more away. Electricians who come behind always run there wire against it.

  4. #4
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    Quote Originally Posted by ironpit View Post
    i haven't been tagged on it yet, but I aways take pain to keep it two inches or more away. Electricians who come behind always run there wire against it.
    Whats going on, that made you think about this?
    "Better tell the sandman to stay away, because we're gonna be workin on this one all night."

    "Dude, you need more than 2 wires to a condenser to run a 2 stage heatpump."

    "Just get it done son."

    Dad adjusted

  5. #5
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    Dec 2011
    Location
    bedford ind
    Posts
    1,088
    A conversation with my son-in-law. He is a union electrician and a very good one at that. I didn't think to ask him at the time, but thought about "clearance to metallic objects" later. By the way, I like most of your postsYou seem very good.

  6. #6
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    Dec 2005
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    Cincinnati, Oh
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    Quote Originally Posted by ironpit View Post
    A conversation with my son-in-law. He is a union electrician and a very good one at that. I didn't think to ask him at the time, but thought about "clearance to metallic objects" later. By the way, I like most of your postsYou seem very good.
    Well thank you sir!

    I would have thought that clearance to metal is related more toward metal framing, or things that could cut and tear the exterior PVC sheathing on the romex. Which is why I use MC on all commercial jobs.

    What your son in law WILL run into, if he hasn't already, is physical touching of romex wire (or any other plastic), to Blazemaster (orange sprinker piping).
    They (Code council, or whoever writes this junk) have decided that the plastic in blazemaster will deteriorate if it comes in contact will any type of other plastic related material.
    We ran black plastic flex in that particular set of appartments, and we had to get a letter from the manufacturer of the flex, showing that they had done testing related to blazemaster, and that it was allowed to "touch".

    A large project (the banks project here in cinci) actually saw deteriation of blazemaster, at the point of contact.
    "Better tell the sandman to stay away, because we're gonna be workin on this one all night."

    "Dude, you need more than 2 wires to a condenser to run a 2 stage heatpump."

    "Just get it done son."

    Dad adjusted

  7. #7
    Join Date
    Dec 2007
    Location
    north suburbs of Chicago
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    513
    I wish we could still even run flex here! What a nightmare those changes caused for attic jobs.

  8. #8
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    Quote Originally Posted by Glennhvac View Post
    I wish we could still even run flex here! What a nightmare those changes caused for attic jobs.
    ....what!?!
    "Better tell the sandman to stay away, because we're gonna be workin on this one all night."

    "Dude, you need more than 2 wires to a condenser to run a 2 stage heatpump."

    "Just get it done son."

    Dad adjusted

  9. #9
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    bedford ind
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    I was thinking about shorts or induced voltage that might occur from nearby lightening strikes.I've seen where lightening has induced voltage in wiring and jumped to metal duct.

  10. #10
    Join Date
    Dec 2007
    Location
    north suburbs of Chicago
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    513
    Quote Originally Posted by hvacvegas View Post
    ....what!?!
    We are allowed to run about 5 feet of flex. Anything else has to be HARD pipe and hand insulated. I think to prevent fumes when the house is burning to the ground.

  11. #11
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    Nov 2006
    Location
    Southeastern Pa
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    Quote Originally Posted by ironpit View Post
    I was thinking about shorts or induced voltage that might occur from nearby lightening strikes.I've seen where lightening has induced voltage in wiring and jumped to metal duct.
    I think that a magnetic field strength that is sufficient to induce a voltage from a lightning strike would be so close to the building that the induced voltage would be the least of the effects.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  12. #12
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    Nov 2006
    Location
    Southeastern Pa
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    The only code provision that I can think of is that the wiring must be protected from damage. I doubt that contact with flex duct is likely to cause damage to NM cable.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  13. #13
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    I've seen an example of it. Just don't remember where.

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