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Thread: Electric & Telephone line Height requirements

  1. #1
    Join Date
    Nov 2003
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    1

    Electric & Telephone line Height requirements

    I am trying to find out what the height restrictions are for telephone lines and electric lines in Indiana for city streets and alleys. I understand from the IURC that they are regulated by the National Electric Code but cannot find the specific code.

  2. #2
    Join Date
    Feb 2003
    Location
    Portage, Indiana NEC: 2008
    Posts
    9,861

    Re: Electric & Telephone line Height requirements

    For Overhead Communications Wires and Cables: See 2002 NEC 800.10

    For power wires: See 2002 NEC 225.18
    Wayne A. From: N.W.Indiana
    Be Fair, Be Safe
    Just don't be fairly safe

  3. #3
    Join Date
    Feb 2003
    Location
    Illinois
    Posts
    19,330

    Re: Electric & Telephone line Height requirements

    The NEC does not normally apply to lines over city streets or alleys. These lines most often owned by the utilities and utilities are not coverd by the NEC. They use the National Electrical Safety Code.
    Don
    Don, Illinois
    "It is the first responsibility of every citizen to question authority." B Franklin

  4. #4
    Join Date
    Jun 2003
    Location
    Hawthorne, NY
    Posts
    2,414

    Re: Electric & Telephone line Height requirements

    The NEC has nothing to do with public property and utilities. Minimum clearance above roads and streets is determined by the utility. Usually this is a very minimum of 15 feet considering that the maximum legal height of a truck can be no more than 14'6".

  5. #5
    Join Date
    Feb 2003
    Location
    Bremerton, Washington
    Posts
    6,659

    Re: Electric & Telephone line Height requirements

    The NEC does have clearances, in Art 230 services and Art 225 outside branch circuits and feeders, but they only apply on the customer side of the service point. servcie drop conductors are typically under the control of the serving utility and fall under the NESC. 19 feet is a common clearance. Telephone lines likewise are not rebulated by the NEC, your local phone company will have its own rules it follows.
    Moderator-Washington State
    Ancora Imparo

  6. #6
    Join Date
    Feb 2003
    Location
    Indianapolis
    Posts
    6,102

    Re: Electric & Telephone line Height requirements

    Indiana utilities must follow the NESC which is adopted into law. All lines must be at the minimum height under the worst of conditions. Indiana is totally in the heavy loading district. This means we must design for the sag of conductors with 1/2" of radial ice and no wind. We also have to design for the heaviest ampere loading on the hottest day with no wind.

    With all that said, you mentioned the city streets and alleys. Is this city owned electric and telephone distribution? In other words, before I answer your question I want to know who owns the conductors.
    Charlie Eldridge, Indianapolis, Utility Power Guy
    Responses based on the 2011 NEC, unless stated otherwise.

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