Permanently Connected Appliance Disconnect
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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
Permanently Connected Appliance Disconnect
By Mike Holt
Appliance Rated at Not Over 300VA or 1/8
The branch-circuit overcurrent device, such as a plug fuse or circuit
breaker, can serve as the appliance disconnect.
Appliance Rated Over 300VA or 1/8 Horsepower
A switch or circuit breaker located within sight from the appliance can
serve as the appliance disconnecting means. If the switch or circuit
breaker is capable of being locked in the open position, it does not
need to be within sight if the provision for locking or adding a lock
on the disconnecting means. "Within sight" is visible and not more than
50 feet from one to the other [Art. 100].
Editor's note: This information was extracted from Mike
the National Electrical Code
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: Think horizontal.
By Mike Holt
Q. When PVC conduit is used, does the Code
require an equipment grounding conductor between the meter enclosure
the service disconnect?
Visit EC&M's Web
site to see the answer.
By Steven Owen
Q. In accordance with the 2008 NEC, excluding
exceptions, arc-fault circuit-interrupter protection is required in
which of the following dwelling unit locations?
- All 15- and 20-ampere, 120-volt, single-phase branch circuits in
- Bedrooms only, omitting the smoke detector branch circuit
- Bedrooms only, including the smoke detector branch circuit
- Family rooms, dining rooms, living rooms, parlors, libraries, dens,
bedrooms, sun rooms, recreation rooms, closets, hallways, or similar
rooms or areas
Web site for the answer and explanation.
Need help defining the parameters of your facility's next Arc
Flash Hazard Evaluation? ESA's electrical engineers have written a
detailed specification to help you determine what you need for your
study. This Arc Flash tool is provided in a Word document that can be
easily customized to include your facility's unique requirements.
Request your Free Arc Flash Study Specification: Click
Code News Update
Code Committee Call-Up
Got some extra time on your hands? Looking to put some
of your vast knowledge of the electrical field to use? NFPA is looking
for new members for several of its committees, including the
Anyone interested in serving can download the application form at NFPA's Web
- Committee on Electrical Systems Maintenance (seeking members in all
categories, except special experts). This committee is responsible for
NFPA 73, Electrical Inspection Code for Existing Dwellings.
- National Electrical Code Panel 4 (seeking members in all
categories). This panel is responsible for Articles 225, 230, 690, 692,
- National Electrical Code Panel 13 (seeking members in all
categories). This panel is responsible for Articles 445, 455, 480, 695,
700, 701, 702, and 708.
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
Year after year, electrical contractors, consultants,
engineers, plant managers, and other electrical professionals make it
their business to stay on top of the latest industry developments by
attending the Electric West Conference program, scheduled for Las Vegas
from Feb. 27-29. It provides the tools you need to become more
efficient, work faster, more profitably and stay ahead of the
competition. Categories include:
For 2008, the Power
Quality segment will be expanded into its own separate conference. For
more information and to register, visit the Electric West Web
- Code Changes &
- Industrial Applications
- Home Automation
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
Click here today
find up-to-date UL Listed products at the UL Code Correlation Database.
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