water heater whip

Discussion in 'Electrical Forum discussion & Blog' started by bharbwyr, Jul 30, 2008.

  1. bharbwyr

    bharbwyr New Member

    Messages:
    2
    Location:
    Maine
    what does the code have to say about wiring methods for water heater whips? Something in the back of my mind says there may be something new this cycle. The marathon heater is in a basement with a dirt floor, although it will be on a cement pad. I guess this would be considered a damp location. I'm inclined to go with carlon "smurf tube", but is mc ok too?
    Last edited: Jul 31, 2008
  2. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,486
    Location:
    Cave Creek, Arizona
    whip

    My inspectors want a metallic sheathed cable to prevent damaging it, although others here have given me flack about it and say they use plain Romex.
  3. Speedy Petey

    Speedy Petey Licensed Electrical Contractor

    Messages:
    991
    Location:
    NY State, USA
    The funny thing HJ is that MC cable offers NO more protection than NM cable in the eyes of the code. :rolleyes:

    Also, we didn't give you flack. The objection was that you stated as fact that metallic cable was required when it is definitely not.
  4. jwelectric

    jwelectric Electrical Contractor/Instructor

    Messages:
    2,531
    Location:
    North Carolina
    This is a big problem on sites where the unqualified people give out advice.

    On most to these DIY websites there will be one or two people that know what they are talking about and the rest are want-a-be professionals.

    Here on this site there has been some life safety issues dealt out as sound advice. DIY sites should have someone that is qualified to give out professional advice set in place as moderator with delete powers.

    Another view is that anyone asking a question about something they know nothing about should take any and all advice with a grain of salt.
  5. Mikey

    Mikey Aspiring Old Fart, EE, computer & networking geek

    Messages:
    2,714
    Location:
    Central Florida
    Sorry to revive an old thread, but it's on topic.

    I'm helping with a renovation of an older home. The water heater was powered by a fabric-covered 10-2 w/g cable dangling from the ceiling, so we're trying to clean that up. That cable now goes to a 4x4 box in the wall, and from there we're going to run a whip of some sort to the WH. The WH specifies solid wire, but the inspector (it's rumored) likes to see FMC from the wall to the WH. But, all the tables, etc., in the code specify stranded wire in FMC. There's essentially no flexing going on in this installation, so I was just going to strip the red, black and bare (solid) conductors out of a leftover piece of 10-3 w/g Romex, or encase the whole Romex length in the (1/2") flex. What do the pros do?
  6. jwelectric

    jwelectric Electrical Contractor/Instructor

    Messages:
    2,531
    Location:
    North Carolina
    Don’t strip the sheathing off the conductors as there is no marking on the conductors and they would not be allowed in any type of raceway. Just install the NM-B cable inside the raceway
  7. Mikey

    Mikey Aspiring Old Fart, EE, computer & networking geek

    Messages:
    2,714
    Location:
    Central Florida
    I should have remembered that; thanks.
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