The List of Lists
Purpose of the NEC
NFPA 70E Standard:
Speak Now, or Forever Hold Your Complaints
2006 World Safety Conference &
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The designations "National Electrical Code” and “NEC” refer to the
National Electrical Code®, which is a registered trademark of the
National Fire Protection Association.
Top 50 NEC Rules
The List of
Everyone likes to see lists of the top items in a
particular subject area, right? For instance, David Letterman's humorous
top 10 lists, the Fortune 500 listing, or People magazine's top
celebrity listing. Heck, we even publish our own Top 40 Design Firms and
Top 50 Contractors lists in EC&M.
In speaking with NEC expert Mike Holt, I recently learned that Mike
Holt Enterprises has a Top 50 NEC Rules listing. We view this list as
sort of a "NEC basics must know rules" listing. We also thought it would
be worthwhile to share this list with you, one rule at a time, over the
next 50 issues of CodeWatch. Consider this a great way to remind
yourself and others of the key rules noted in our most important
Note: We'll present the rules to you in the numerical order in
which they appear in the NEC.
Purpose of the NEC
By Mike Holt
The NEC is meant to safeguard persons and property from
the hazards that arise from the use of electricity. The Code is not
meant to serve as a design specification or an instruction manual for
untrained persons. Compliance with the rules of the Code and proper
maintenance will result in an installation that is free from hazard.
Achieve Your Performance Goals
Anticipate, prevent and troubleshoot motors, electrical and equipment
maintenance with fast, accurate non-contact temperature measurements
with Fluke infrared thermometers. www.fluke.com/codewatch_temp
What's Wrong Here?
By Joe Tedesco
Think you know how this installation violates the
Visit EC&M's Web
site to see the answer.
Hint: Are these conduits properly installed?
By Mike Holt
Q. What is the minimum burial depth requirement
for residential service lateral conductors installed in rigid
Web site to see the answer.
By Steven Owen
Q. Disregarding the Exceptions in 225.32, when
are you not required to install a disconnecting means for a building or
structure at the building or structure? Hint: A structure is
defined as "that which is built or constructed." A structure could
include (but not be limited to) a generator, a communications tower, or
possibly a piece of plywood attached to a 4-inch by 4-inch wooden post
inserted into the ground (supporting electrical equipment).
B) When the disconnecting means is capable of being remotely
C) Where a generator housed outdoors is equipped with a readily
accessible disconnecting means located within sight of the building or
D) When the disconnecting means has ground-fault protection
integral to it
Web site for the answer and explanation.
By Steven Owen
The answer to the question in the last
issue was incorrectly shown as: A) fire alarm systems. In
retrospect, I should have added a fifth option, which read as follows:
E) none of the above. This would be the correct answer in this
All of the items listed in the question require secure support in
hollow spaces above suspended ceilings. The fire alarm circuits are
already installed exposed on the surface of the ceiling. Therefore, the
issue of support for 300.11 is not an issue in this example. Sorry for
10 Steps of an Effective Arc Flash Hazard Safety
Program from ESA
Developing and implementing an arc flash hazard program that meets the
requirements of IEEE 1584, NFPA 70E, and OSHA Standard 29 is
challenging. Meeting these requirements on a constrained budget and with
limited manpower assets requires proper planning and execution. Our
informative guide, "10 Steps of An Effective Arc Flash Hazard Safety
Program," is the perfect resource to help you get started. www.easypower.com
Offer code: WA0517
NFPA 70E Standard: Speak Now, or
Forever Hold Your Complaints
In accordance with the Regulations Governing Committee
Projects, the NFPA committee for the Standard for Electrical Safety in
the Workplace (NFPA 70E-2004) is now accepting proposals for
recommendations on content. So if you've got a beef with the current
wording in this document, or feel some additional information needs to
be added, then speak up now and let your voice be heard. The committee
will act on proposals received by 5 p.m. ET on Sept. 15, 2006, and that
action will be published in the committee's report. All proposals must
be submitted to Codes and Standards Administration on proposal forms
available in the back of all NFPA documents or from NFPA headquarters.
Cool Electronic Cabinets
EXAIR's low cost Cabinet Coolers stop electronic control downtime due to
heat, dirt and moisture. UL Listed Cabinet Coolers 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
Shows and Events
2006 World Safety
Conference & Exposition
The 12 sessions that make up the necforumTM are designed
to help you consider new electrical design issues, analyze maintenance
programs, review best practices in the electrical contracting arena,
learn effective inspection techniques, and implement practical safety
programs. If these topics interest you, then make plans to fly to
Orlando in early June and take part in this year's event, which will be
held from June 2-8, 2006. Visit the NFPA
World Safety Web site for additional details.
Connected & Protected
IDEAL's new WeatherProof Wire Connectors are the fastest, easiest
and safest way to connect wires in damp or wet locations. Pre-filled
with a silicone-based sealant and UL listed to 486D, these connectors
protect conductors from moisture, humidity and other corrosive elements.
to request a free sample.
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