| CONTENTS
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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.
- required / are not / is
- mandatory / are not / is
- 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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Database.
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