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  1. #1
    Join Date
    Mar 2012
    Location
    Cleveland, Ohio
    Posts
    52

    Default Low voltage wiring within panel - question



    While I know to write up the transformer located within the panel due to low voltage side being on the interior, I am inclined to apply same rule on the other wires from the same run (coiled in bottom) that go to the load meter sensor rings around the two main wires for the demand metering unit. The home no longer uses the demand meter since the utility stopped their discounts for all electric homes here, but was this improperly installed to begin with? 1991 home in Ohio. Do these demand units have allowances I should know of?

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  2. #2
    Join Date
    Mar 2007
    Location
    Plano, Texas
    Posts
    4,196

    Default Re: Low voltage wiring within panel - question

    Quote Originally Posted by chris vis View Post


    While I know to write up the transformer located within the panel due to low voltage side being on the interior, I am inclined to apply same rule on the other wires from the same run (coiled in bottom) that go to the load meter sensor rings around the two main wires for the demand metering unit. The home no longer uses the demand meter since the utility stopped their discounts for all electric homes here, but was this improperly installed to begin with? 1991 home in Ohio. Do these demand units have allowances I should know of?
    "725.136 Separation from Electric Light, Power, Class 1,
    Non–Power-Limited Fire Alarm Circuit Conductors, and
    Medium-Power Network-Powered Broadband Communi-
    cations Cables.
    (A) General. Cables and conductors of Class 2 and Class 3
    circuits shall not be placed in any cable, cable tray, com-
    partment, enclosure, manhole, outlet box, device box, race-
    way, or similar fitting with conductors of electric light,
    power, Class 1, non–power-limited fire alarm circuits, and
    medium-power network-powered broadband communica-
    tions circuits unless permitted by 725.136(B) through (I).
    (B) Separated by Barriers. Class 2 and Class 3 circuits
    shall be permitted to be installed together with the conductors
    of electric light, power, Class 1, non–power-limited fire alarm
    and medium power network-powered broadband communica-
    tions circuits where they are separated by a barrier." No mixing of high and low voltage conductors.



    Jim Luttrall
    www.MrInspector.net
    Plano, Texas

  3. #3
    Join Date
    Aug 2008
    Location
    Maryland
    Posts
    1,914

    Default Re: Low voltage wiring within panel - question

    That article does not apply. The wires are not fire alarm nor broadband communication wiring.

    All answers based on unamended National Electrical codes.

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