Intersystem Bonding Terminal
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The designations "National Electrical Code" and "NEC" refer to
National Electrical Code®, which is a registered
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Top 2008 Code Changes
Intersystem Bonding Terminal
By Mike Holt
A new rule requires an intersystem bonding terminal for
communications systems. According to Art. 100, an intersystem bonding
terminal is a device that provides a means to connect communications
systems grounding and bonding conductors to the building grounding
An external accessible intersystem bonding terminal for the
and bonding of communications systems shall be provided at service
equipment and disconnecting means for buildings or structures supplied
by a feeder. The intersystem bonding terminal shall not interfere with
the opening of any equipment enclosure and be one of the following:
An Exception to this requirement notes that at existing buildings or
structures, an external accessible means for bonding communications
systems together can be:
- Terminals listed for grounding and bonding attached to a meter
- Bonding bar connected to the equipment grounding conductor with a
minimum 6 AWG copper conductor.
- Bonding bar connected to the grounding electrode conductor with a
minimum 6 AWG copper conductor.
A second Fine Print Note states communications systems shall be bonded
to the intersystem bonding terminal in accordance with the
- Nonflexible metallic raceway,
- Grounding electrode conductor, or
- Connection approved by the Authority Having Jurisdiction.
It's important to note that all external communications systems must be
bonded to the intersystem bonding terminal to minimize the damage to
communications systems from induced potential (voltage) differences
between the systems from a lightning event.
- Antennas/Satellite Dishes [810.15 and 810.21]
- CATV [820.100]
- Telephone Circuits [800.100]
This new requirement is one of several correlated proposals to
improve the requirements related to the intersystem bonding and
grounding of communications systems. This provides a more accessible,
safer means of bonding all systems, such as power and communications,
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
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: Floppy, droopy and lazy!
By Mike Holt
Q. How do you size the ground wire when running
conductors in parallel?
Visit EC&M's Web
site to see the answer.
By Steven Owen
Q. According to the 2008 NEC, one of the reasons
why flame-resistant clothing and equipment is required is to protect
qualified persons from the hazard of ______________?
- A gas discharge from an interrupting device.
- A non-insulated tool being dropped onto energized parts.
- The additional hazard of circuits operating at over 600 volts.
- Older equipment that is not properly maintained.
Web site for the answer and explanation.
EasyPower delivers the easiest-to-use, most accurate
tools for designing, analyzing, and monitoring electrical power
Whether you're developing or implementing an 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 on our
website today! http://www.easypower.com
Code News Update
Looking for the latest electrical code, enforcement,
contractor/electrician licensing requirements for each state in the
United States? Here's a good starting point. Check out this National
Electrical Installation Standards (NEIS) state-by-state
source listing maintained by the National Electrical Contractors
Association (NECA) Chapters. This valuable list also includes agency
contact information, which offers you the opportunity to make contact
with key members of local enforcement authorities.
Cool Electronic Cabinets
EXAIR's low cost Cabinet Coolers stop electronic control downtime due
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
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
electricians, and plant facility personnel, there's something for
everyone at the Electric Show. The biggest electrical marketplace in
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:
For more information, visit our Web
- 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
Eliminate Red Tags
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 products.
Click here today
find up-to-date UL Listed products at the UL Code Correlation
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