Cast Your Vote
100: Definition of “Neutral Conductor”
Council Tackles 2008 NEC
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EC&M Product of the Year Competition
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Do you want the opportunity to win a $100 gift check?
you’re an EC&M subscriber, we invite you to help us select
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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 Conductor”
By Mike Holt
This new term was added to Art. 100. The definition
reads as follows:
"The conductor connected to the neutral point of a system that is
intended to carry current under normal conditions."
The neutral conductor of a solidly grounded system is required to be
grounded to the earth; therefore, this conductor is also called a
"grounded conductor." The 2005 version of the NEC did not feature a
definition for neutral conductor, although it was used in many
The lack of a definition caused confusion regarding the differences and
similarities between the neutral conductor and the grounded conductor.
Having a clear definition for the neutral conductor will help provide
clarity in making this distinction.
This definition differentiates between the neutral conductor and the
equipment-grounding conductor, both of which are ultimately connected
the neutral point of a system. Under normal conditions, the neutral
conductor is expected to be current carrying, whereas the
equipment-grounding conductor is not.
Where necessary, rules throughout the NEC were revised to use the
term "neutral conductor" or "neutral point" of a supply system. The
“neutral conductor” is intended for use in conjunction with another
new term, "neutral point."
EasyPower delivers the easiest-to-use, most accurate
Windows® -based tools for designing, analyzing, and monitoring
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: A danger sandwich
By Mike Holt
Q. Can a 2-pole snap switch be used to switch a
277V and 120V circuit?
Visit EC&M's Web
site to see the answer.
By Steven Owen
Q. A surge protective device (i.e., surge
arrester or TVSS) shall be permitted for which of the following?
- On circuits exceeding 1kV.
- On ungrounded systems, impedance grounded systems, or corner
grounded delta systems where not listed specifically for use on these
- Where the rating of the surge protective device (SPD) is less than
the maximum continuous phase-to-ground power frequency voltage
at the point of application.
- Where the rating of the SPD is equal to or greater than the maximum
continuous phase-to-ground power frequency voltage available at the
point of application.
Web site for the answer and explanation.
Cool Electronic Cabinets
Stop electronic control downtime due to heat, dirt and moisture. UL
Listed Cabinet Coolers from EXAIR produce 20 degree Fahrenheit air from
an ordinary supply of compressed air to cool electrical controls.
Thermostat control minimizes air usage. Maintains the NEMA 4, 4X
(stainless steel) and 12 rating of the enclosure. Web site offers
detailed information, downloadable drawings and PDF literature.
Code News Update
Wisconsin Advisory Council
According to the April 2008 issue of NEMA’s
electroindustry, the Wisconsin Electrical Code Advisory Council
will make several recommendations to the Wisconsin Department of
Commerce with regard to the 2008 version of the NEC. The
recommendations, when approved, will be incorporated into the Wisconsin
Administrative Code, Chapter Comm 16 Electrical. They are as
A public hearing will be scheduled in the near future so that members
the public can comment on the proposed changes.
- Comm 16.20(2) ― Add the following: “In addition to the
requirements of NEC 210.8, all 125-volt single phase 15- and 20-ampere
receptacles installed in repair and storage areas in commercial garages
where electrical diagnostic equipment, electrical hand tools, or
portable lighting equipment is to be used, shall have ground-fault
circuit interrupter protection for personnel.”
- Comm 16.21 ― Add the following: “Where RMC, IMC, EMT, or
steel-armored cable, Type AC or MC, meeting the requirements of 250.118
using metal outlet and junction boxes is installed for the portion of
the branch-circuit overcurrent device and the first outlet, it shall be
permitted to install a combination AFCI at the first outlet to provide
protection for the remaining portion of the branch circuit.”
- Comm 16.265 ― Add the following: “A single electrode consisting
of a rod, pie, or plate shall be augmented by one additional electrode
of any of the types specified in NEC 250.52(A)(4) through (A)(8).”
- Comm 16.327 ― Add the following: “NEC 334.12(A)(2) does not
apply in Wisconsin.”
- Comm 16.392 ― Revise to read as follows: “511.3(C)(1)(a) and
511(C)(2)(a) do not apply in Wisconsin.”
- Comm 16.45(1)(b)(1) ― “AC cable” will be added as an option
for emergency circuit wiring.
- Comm 16.45(1)(b)(2) ― Revise wording to read as follows:
“Emergency lighting fixtures may use flexible cord connections in
compliance with NEC 410.62(C) for electric discharge
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.
Shows and Events
Visit the EC&M e-Tradeshow
Look for this free live
conference, scheduled for Thursday, May 8 at 10 a.m. Eastern and
Calculating Arc Flash Energy Levels by Benjamin Medich,
This conference will detail how NFPA 70E, “Standard for
Electrical Safety in the Workplace,” and IEEE 1584, “Guide for
Performing Arc-Flash Hazard Calculations,” have varying — and
sometimes overlapping — requirements for the development of an
arc-flash analysis. It also will provide a survey of these methods,
along with the basics to allow an integrated approach to arc-flash
analysis, taking into account the requirements of both analysis
This conference is a must for electrical engineers and designers as
as plant/facility electrical maintenance personnel.
"Understanding Electrical Safety and PPE Selection"
"Implementing an Arc-Flash Safety Compliance Program"
"Preparing an Arc-Flash Hazard Study"
Visit the many exhibitors in this virtual tradeshow and take a look
at the On-Demand Library, where you can view past online conferences
Visit the EC&M eTradeshow.
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