The Hollow Ground
NFPA 70E Standard:
Speak Now, or Forever Hold Your Complaints
Scheduled for 2006 NFPA World Safety Conference & Exposition
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The Hollow Ground
I was called to perform some work in an area containing
a small building and six tennis courts, which were scheduled for
demolition. The feeder conductor was 3/0 copper, and it was connected
a 200A breaker in a separate building. After disconnecting the feeder
the subpanel, I saw what looked like a No. 4 ground wire connected to a
ground rod. I grabbed my intermediate size cutters and was surprised at
how easy it was to snip it. I then took a closer look at the "acorn" on
the ground rod and the connection at the ground bar and noticed that
ends of this "wire" were flattened. The original installer had used a
piece of 1/8-inch copper water tubing for the connection!
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 NEC?
Web site to see the answer.
Hint: Is this a new type of splice box?
By Mike Holt
Q. Can we install coaxial cables inside the duct
work of an existing building?
Web site to see the answer.
By Steven Owen
Q. The installation of fire alarm circuits (Art.
760), communication circuits (Art. 800), CATV and radio distribution
systems (Art. 820), and network powered broadband communication systems
(Art. 830) installed in the hollow space above a suspended ceiling
does not require secure support independent of the existing
used to support the ceiling for which of the following?
A) fire alarm systems
B) communication systems
C) community antenna television systems / radio distribution
D) network powered broadband communication systems (voice and
Web site for the answer and explanation.
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
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/arcflash_resource/10steps.html?source=codewatch0306
Offer code: WA0517
Code News Update
NFPA 70E Standard: Speak Now,
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
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.
Shows and Events
NEC Sessions Scheduled for 2006
World Safety Conference & Exposition
The 12 sessions that make up the
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
to request a free sample.
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