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Code Alert: Texas, 16 December 2010



Recommendation of 2011 National Electrical Code for Adoption

The North Central Texas Council of Governments (NCTCOG) Executive Board endorsed and adopted the 2011 National Electrical Code with regional amendments on November 18, 2010. The desired regional adoption date is set to coincide with the regional adoption date of the 2009 ICC and recommended regional amendments (January 31, 2011). This adoption date will allow the local building code ordinances to have the same effective date as the state law that adopted the 2009 IECC. Members of the Executive Board include:

  • B. Glen Whitley, President – County Judge, Tarrant County

  • Linda Koop, Vice President – Council Member, City of Dallas

  • Bobbie Mitchell, Secretary/Treasurer – Commissioner, Denton County

  • Bobby Waddle, Past President – Mayor, City of DeSoto

  • Carter Burdette, Councilmember – City of Fort Worth

  • Maurine Dickey, Commissioner – Dallas County

  • Holly Gray-Pherson, Mayor Pro Tem - City of Roanoke

  • John Horn, County Judge – Hunt County

  • Ron Jensen, Councilmember – City of Grand Prairie

  • Bill McElhaney, County Judge – Wise County

  • Cory Spillman, Councilmember – City of Cedar Hill

  • Steve Terrell, Mayor – City of Allen

  • Shane Wilbanks, Mayor Pro Tem – City of Grapevine

  • This action followed a lengthy review of the 2011 National Electrical Code and the development of several amendments by the Electrical Advisory Board (EAB) before their actions were forwarded for approval by the Regional Codes Coordinating Committee (RCCC) on November 4th. The RCCC did add a friendly amendment to slightly change text in Article 500.8(A)(3)and Article505.7(A). The amended text “Registered Professional Engineer” changed to “Licensed Professional Engineer” to better reflect Texas state law and to match the usage that exists in the 2011 NEC.

    It is expected that many north Texas jurisdictions will adopt the 2011 National Electrical Code along with the January 31, 2011 adoption of the 2009 ICC family of codes.

    The amendments to the 2011 National Electrical Code as recommended by the NCTCOG

    Electrical Advisory Board, the Regional Codes Coordinating Committee, and the Executive Board are as follows:

    Recommended Amendments to the

    2011 National Electrical Code

    North Central Texas Council of Governments Region

    The following articles, paragraphs, and sentences of the 2011 National Electrical Code (NEC) are hereby amended as follows: Standard type is text from the NEC. Underlined type is text inserted. Lined through type is deleted text from NEC. A double asterisk (**) at the beginning of an article identifies an amendment carried over from the 2008 edition of the code and a triple asterisk (***) identifies a new or revised amendment with the 2011 code.

    ***Article 100, Part I; amend the following definition:

    Intersystem Bonding Termination. A device that provides a means for connecting bonding conductors for communication systems and other systems such as metallic gas piping systems to the grounding electrode system.

    (REASON FOR CHANGE: To allow for a termination point for other bonding conductors in addition to communication systems that are required by the various model codes.)

    ***Article 110.2; change the following to read as follows:

    110.2 Approval. The conductors and equipment required or permitted by this Code shall be acceptable only if approved. Approval of equipment may be evident by listing and labeling of equipment by a Nationally Recognized Testing Lab (NRTL) with a certification mark of that laboratory or a qualified third party inspection agency approved by the AHJ.

    Exception: Unlisted equipment that is relocated to another location within a jurisdiction or is field modified is subject to the approval by the AHJ. This approval may be by a field evaluation by a NRTL or qualified third party inspection agency approved by the AHJ.

    Manufacturer’s self-certification of any equipment shall not be used as a basis for approval by the AHJ.

    Informational Note: See 90.7, Examination of Equipment for Safety, and 110.3, Examination, Identification, Installation, and Use of Equipment. See definitions of Approved, Identified, Labeled, and Listed.

    (REASON FOR CHANGE: To add clarity and provide more positive options for enforcement and approval of unlisted equipment.)

    **Article 230.71(A); add the following exception:

    Exception: Multi-occupant buildings. Individual service disconnecting means is limited to six for each occupant. The number of individual disconnects at one location may exceed six.

    (REASON FOR CHANGE: This is currently the accepted installation practice of the region. No noteworthy complaints have surfaced. It is more reasonable than the current NEC requirements. It allows more than six disconnects grouped at one location. This also allows designers more flexibility in the placement of electrical meters and main service disconnects.)

    ***Article 240.91; delete the Article.

    (REASON FOR CHANGE:Present day equipment is not listed and has not been evaluated for the use. Removing this article may prevent both installers and AHJ’s from misapplying the Code.)

    **Article 300.11; add the following exception:

    Exception: Ceiling grid support wires may be used for structural supports when the associated wiring is located in that area, not more than two raceways or cables supported per wire, with a maximum nominal metric designation 16 (trade size 1/2”).

    (REASON FOR CHANGE: To provide limited support of raceways and cables by ceiling grid support wire.)

    **Article 310.15(B)(7); change to read as follows:

    (7) 120/240-Volt, 3-Wire, Single-Phase Dwelling Services and Feeders. For dwelling units, conductors, as listed in Table 310.15(B)(7), shall be…{text unchanged}…provided the requirements of 215.2, 220.61, and 230.42 are met. This Article shall not be used in conjunction with 220.82.

    (REASON FOR CHANGE: To provide a more reasonable margin of safety for dwelling service and feeder conductor allowable ampacities.)

    **Article 500.8(A)(3); change to read as follows:

    500.8 Equipment. Articles 500 through 504 require equipment construction and installation standards that ensure safe performance under conditions of proper use and maintenance.

    Informational Note No. 1: It is important that inspection authorities and users exercise more than ordinary care with regard to installation and maintenance.

    Informational Note No. 2: Since there is no consistent relationship between explosion properties and ignition temperature, the two are independent requirements.

    Informational Note No. 3: Low ambient conditions require special consideration. Explosion proof or dust-ignition proof equipment may not be suitable for use at temperatures lower than -25°C (-13°F) unless they are identified for low-temperature service. However, at low ambient temperatures, flammable concentrations of vapors may not exist in a location classified as Class I, Division 1 at normal ambient temperature.

    (A) Suitability. Suitability of identified equipment shall be determined by one of the following:

    (1) Equipment listing or labeling

    (2) Evidence of equipment evaluation from a qualified testing laboratory or inspection agency concerned with product evaluation

    (3) Evidence acceptable to the authority having jurisdiction such as a manufacturer's self-evaluation or an owner's engineering judgment signed and sealed by a qualified Licensed Professional Engineer.

    Informational Note: Additional documentation for equipment may include certificates demonstrating compliance with applicable equipment standards, indicating special conditions of use, and other pertinent information. Guidelines for certificates may be found in ANSI/ISA 12.00.02, Certificate Standard for AEx Equipment for Hazardous (Classified) Locations.

    (REASON FOR CHANGE: To better define the qualifications for an engineering judgment.)

    **Article 505.7(A) changed to read as follows:

    505.7 Special Precaution. Article 505 requires equipment construction and installation that ensures safe performance under conditions of proper use and maintenance.

    Informational Note No. 1: It is important that inspection authorities and users exercise more than ordinary care with regard to the installation and maintenance of electrical equipment in hazardous (classified) locations.

    Informational Note No. 2: Low ambient conditions require special consideration. Electrical equipment depending on the protection techniques described by 505.8(A) may not be suitable for use at temperatures lower than -20°C (-4°F) unless they are identified for use at lower temperatures. However, at low ambient temperatures, flammable concentrations of vapors may not exist in a location classified Class I, Zones 0, 1, or 2 at normal ambient temperature.

    (A) Implementation of Zone Classification System. Classification of areas, engineering and design, selection of equipment and wiring methods, installation, and inspection shall be performed by a qualified persons Licensed Professional Engineer.

    (REASON FOR CHANGE: To better identify who is qualified to implement Zone Classification Systems.)

    ***Article 680.25(A) changed to read as follows:

    680.25 Feeders. These provisions shall apply to any feeder on the supply side of panelboards supplying branch circuits for pool equipment covered in Part II of this article and on the load side of the service equipment or the source of a separately derived system.

    (A) Wiring Methods.

    (1) Feeders. Feeders shall be installed in rigid metal conduit or intermediate metal conduit. The following wiring methods shall be permitted if not subject to physical damage:

    (1) Liquidtight flexible nonmetallic conduit

    (2) Rigid polyvinyl chloride conduit

    (3) Reinforced thermosetting resin conduit

    (4) Electrical metallic tubing where installed on or within a building

    (5) Electrical nonmetallic tubing where installed within a building

    (6) Type MC cable where installed within a building and if not subject to corrosive environment

    (7) Nonmetallic-sheathed cable

    (8) Type SE cable

    Exception: An existing feeder between an existing remote panelboard and service equipment shall be permitted to run in flexible metal conduit or an approved cable assembly that includes an equipment grounding conductor within its outer sheath. The equipment grounding conductor shall comply with 250.24(A)(5).

    (REASON FOR CHANGE: To allow for more flexibility of wiring methods associated with this type of installation.)

    Contact: John Minick: john.minick@nema.org

     

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