Cast Your Vote Now!
100: Definition of “Neutral Point”
Learn About the
Changes in the 2008 National Electrical Code
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EC&M Product of the Year Competition
Do you want the opportunity to win a $100 gift check?
you’re an EC&M subscriber, we invite you to help us select
year’s Product of the Year winner. The deadline for voting is June
2008. To make your voice heard, visit the EC&M Home page anytime before now and
then. Click on “vote now and become eligible for a $100 gift
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The competition has honored innovation and excellence in product
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The Fluke 1735 Power Logger is the ideal electrician or technician's
power meter for conducting energy studies and basic power quality
logging. Set the Power Logger up in seconds with the included flexible
current probes and color display. The power quality meter measures most
electrical power parameters, harmonics, and captures voltage events. www.fluke.com/codewatch
Top 50 NEC Rules
100: Definition of “Neutral Point”
By Mike Holt
This new term was added to Art. 100. The definition
reads as follows:
“The common point on a 4-wire, 3-phase, 120/208V or 277/480V
wye-connected system, the midpoint of a 3-wire, 120/240V single-phase
system, or the midpoint of the single-phase portion of a 120/240V
3-phase delta-connected system.
FPN: The potential of the
sum of the nominal voltages from all other phases that utilize the
neutral, with respect to the neutral point, is zero volts.”
Rather than attempting to include all the concepts needed for the
definition of the term “neutral” in a single definition, the Task
Group of the Technical Correlating Committee chose to use two
interdependent definitions. The definition of “neutral point”
describes the point to which the neutral conductor is connected at the
EasyPower delivers the easiest-to-use, most accurate
Windows®-based tools for designing, analyzing, and
electrical power systems. Whether you’re developing or implementing
Arc Flash Safety Program, you can rely on ESA to help. Take
advantage of our free Arc Flash Videos, Arc Flash Book, Arc Flash
Specification, Ten Step Guide and more. Check out the quick links
our website today! www.easypower.com
What’s Wrong Here?
By Joe Tedesco
Think you know how this installation violates the
Web site to see the answer.
Hint: Box-less devices?
By Mike Holt
Q. Can the lights in a dwelling unit bathroom be
on the same circuit as the bathroom receptacles?
Visit EC&M's Web
site to see the answer.
By Steven Owen
Q. When connecting a surge protective device
(SPD) grounding conductor of a Type 1 SPD at the service, which of the
following connections is permitted? Note: the SPD may be a surge
arrester or TVSS.
- Equipment grounding terminal in the service equipment.
- Grounding electrode for the service.
- Grounding electrode conductor.
- Grounded service conductor
- All of the above are permitted.
Web site for the answer and explanation.
Cool Electronic Cabinets
Summer will be here soon! Prevent hot weather failures. EXAIR Cabinet
Coolers are the low cost way to purge and cool electronic controls with
20 degree Fahrenheit air. All models are UL Listed and maintain the
4, 4X or 12 rating of the enclosure. Many cooling capacities are
available. Web site offers detailed information, downloadable drawings
and PDF literature. EXAIR Corporation
Shows and Events
Learn About the Changes in the 2008 National Electrical Code
In two informative and interest-filled days with Mike Holt,
you'll learn about major NEC changes that will impact your work,
you're an electrician, contractor, engineer, designer, or
maintenance person. You'll also earn continuing education hours and
professional development hours.
Two conferences are scheduled for later this year:
--September 4-5 in Portland, Ore.
--September 8-9 in San Antonio
For more information and to register online, go to http://CodeChangeConferences.com
It takes more than the UL Mark on a product to satisfy code
requirements. Before your next installation, use UL's Code Compliance
Database to identify the correlation between model codes and UL
Certified products, as well as find manufacturers of certified
Click here today to
find up-to-date UL Listed products at the UL Code Correlation Database.
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