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250.146
Connecting Receptacle Grounding Terminal to Box
What's
Wrong
Here?
Code Q&A
Code Quiz
Code Committee
Call-Up
Electric West
2009
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Top 2008 Code Changes
250.146
Connecting Receptacle Grounding Terminal to Box
By Mike Holt
A new sentence in section (A) Surface-Mounted Box adds
bonding requirements for receptacles attached to exposed work covers.
An equipment bonding jumper is not required for receptacles attached
to listed exposed work covers when the receptacle is attached to the
cover with two permanent fasteners (rivets), or have a threaded or
screw
locking means; and the cover mounting holes are located on a flat
non-raised portion of the cover.
This rule was added because exposed work covers with two fasteners
to
attach the receptacle to the cover are listed as a suitable bonding
means.
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Code Challenge
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: Fried food for dinner?
Code Q&A
By Mike Holt
Q. What is the maximum height that a safety
switch can be installed?
Visit EC&M's Web
site to see the answer.
Code Quiz
By Steven Owen
Q. The insulation of batteries rated greater
than
250V may be all but which of the following?
- Air may be the insulating material if a minimum separation of 2
inches is maintained between live battery parts of opposite polarity
(battery voltage not exceeding 600V).
- Air may be the insulating material if a minimum separation of ½
inch is maintained between live battery parts of opposite polarity
(battery voltage not exceeding 600V).
- Bakelite or other insulating material.
- Mycarta or other insulating material.
Visit EC&M's
Web site for the answer and explanation.
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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
following:
- Committee on Electrical Equipment Evaluation (seeking members in
all
interest categories).
- Committee on Electrical Systems Maintenance (seeking members in all
interest categories, except special experts). This committee is
responsible for NFPA 73, Electrical Inspection Code for Existing
Dwellings.
Anyone interested in serving can download the application form at NFPA’s Web
site.
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Shows and Events
Electric West
2009
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
engineers,
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everyone at the Electric Show. The biggest electrical marketplace in
the
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more than 6,000 attendees every year. Here's a preview of some of the
NEC seminars planned for next year's event:
- 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
For more information, visit our Web
site.
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Database.
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