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December 4, 2008 A Penton Media Publication Vol. VI No. 23

CONTENTS
406.8 Receptacles in Damp or Wet Locations

What's Wrong Here?

Code Q&A

Code Quiz

Preparing for Action

Electric West 2009


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    Top 2008 Code Changes















    406.8 Receptacles in Damp or Wet Locations

    By Mike Holt
    Receptacles installed in wet locations are now required to be weather resistant.

    As per 406.8(B)(1) Receptacles in Wet Locations, all 15A and 20A receptacles installed in a wet location shall be within an enclosure that is weatherproof when an attachment plug is inserted and all non-locking 15A and 20A, 125V and 250V receptacles in a wet location shall be listed as weather resistant. An exception notes that receptacles subject to routine high-pressure washing spray may have an enclosure that is weatherproof when the attachment plug is removed.

    Wet locations are those subject to saturation with water, and unprotected locations exposed to weather [Art. 100].

    Exposed plastic surface material of weather-resistant receptacles must have UV resistance to ensure deterioration from sunlight does not take place or is minimal. In testing, receptacles are subjected to temperature cycling from very cold to very warm conditions and then additional dielectric testing. The rapid transition from the cold to warm temperature will change the relative humidity and moisture content on the device and the dielectric test ensures that this will not present a breakdown of the device's insulation properties.

    The change to this subsection was made in response to concerns that receptacles located outdoors are not always protected from detrimental conditions such as low temperatures, exposure to ultraviolet radiation (UV), physical damage, etc., and that weatherproof covers and enclosures do not always provide sufficient protection from the elements.

    The new exception allows receptacle covers in high-pressure spray washing areas to be of the type that is weatherproof when the attachment plug is removed. When a weatherproof while-in-use cover is used with high-pressure spray cleaning, liquid can spray into the enclosure through the cable openings. This change allows the use of a snap cover that does not have a cable opening in it while closed.


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    Code Challenge
    What's Wrong Here?
    By Joe Tedesco
    Think you know how this installation violates the NEC? Visit EC&M's Web site to see the answer.

    Hint: A case of overexposure


    Code Q&A
    By Mike Holt
    Q. We had a new swimming pool installed at our house, and the electricians ran a cable to the pool equipment room panel. Is this legal?

    Visit EC&M's Web site to see the answer.


    Code Quiz
    By Steven Owen   
    Fill in the blanks.
    When installing temporary wiring in exhibition halls, for events such as trade shows, the temporary wiring is __________ to be installed in accordance with Art. 590. Flexible cables and cords approved for hard or extra-hard usage __________ permitted to be laid directly on the floors where protected from contact by the general public. Ground-fault circuit-interrupter protection __________ required.

      1. required / are not / is
      2. mandatory / are not / is
      3. permitted / are / is not

    Visit EC&M's Web site for the answer and explanation.


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    Code News Update
    Preparing for Action
    NFPA documents are presented for action at the association's annual technical meeting only when amending motions have been submitted to the NFPA in advance of the meeting and certified by the Motions Committee of the Standards Council. Under the rules in effect, only Certified Amending Motions and proper Follow-Up Motions will be allowed.

    The following documents in the Annual 2009 Revision Cycle that could receive Notice of Intent to Make a Motion and be presented for action at the 2009 Association Technical Meeting in Chicago include:

    • NFPA 110, Standard for Emergency and Standby Power Systems
    • NFPA 111, Standard on Stored Electrical Energy Emergency and Standby Power Systems
    The Motions Committee Report on documents in the 2009 revision cycle will be posted on the NFPA Web site no later than May 1, 2009.



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    Shows and Events



    Electric West 2009

    The Electric West Show, to be held March 18-20, 2009 at the Las Vegas Convention Center in conjunction with the Power Quality Reliability Conference, is the perfect place to brush up on the latest NEC topics – and earn continuing education credits in the process. Geared toward electrical contractors, consulting & specifying engineers, electricians, and plant facility personnel, there’s something for everyone at the Electric Show. The biggest electrical marketplace in the western United States, this event attracts 250 exhibiting companies and more than 6,000 attendees every year. Here's a preview of some of the NEC seminars planned for next year's event:
    • One- and Two-Family Dwelling Unit Electrical Systems
    • Changes to the 2008 NEC
    • Swimming Pools and Similar Installations (NEC Article 680)
    • Introduction to the 2009 NFPA 70E
    For more information, visit our Web site.



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