City of Phoenix Now
Enforcing 2008 NEC
EC&M University's Online Arc Flash Courses
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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.
Code News Update
City of Phoenix Now Enforcing 2008
As of May 1, 2009 the City of Phoenix is enforcing the
requirements of the 2008 NEC, with a few minor modifications. A short
list of city-approved amendments relate to the following sections of
To review the details of the amendments in PDF format, click here.
- Article 210 – Branch Circuits
210.8 Ground-Fault Circuit-Interrupter Protection for Personnel
- Article 250 – Grounding and Bonding
250.118 Types of Equipment Grounding Conductors
- Article 334 – Nonmetallic-Sheathed Cable; Types NM, NMC and
334.10 Uses Permitted and 334.12 Uses Not Permitted
Have a UL White Book but not sure how to use it?
Discover why the UL White Book is Part 2 of the NEC and how it will
you avoid "Red Tagged" jobs. Click here to learn how to
use the White Book online FREE (or to order a copy).
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: Wireless A/C controls?
By Mike Holt
Q. We are being told that we must GFCI protect
our receptacle for the washing machine if it is located within 6 ft of
the laundry sink. Even though we chose to use a single receptacle for
the washer, the inspector still won't pass it. Is he correct in his
Visit EC&M's Web
site to see the answer.
By Steven Owen
When installing feeder conductors for portable
switchboards at a facility like the Grand Ole Opry in Nashville, Tenn.,
an issue arises regarding the size of the supply neutral conductor.
Here's the situation.
Single-conductor feeder cables (not installed in raceways) are used
on multiphase circuits feeding portable switchboards containing
solid-state phase-control dimmers. This arrangement calls for the
neutral conductor to have an ampacity of at least 130% of the
circuit conductors feeding the portable switchboard. The size of the
largest ungrounded phase conductor is 500kcmil.
What is the minimum size required for the supply neutral conductor
- Two sizes smaller (i.e., 350kcmil)
- Same size (i.e., 500kcmil)
- One size larger, just to be safe (i.e., 600kcmil)
- Minimum 650kcmil, which means you'll use a 700kcmil
Web site for the answer and explanation.
Cool Electronic Cabinets
Beat the summer time heat and prevent hot weather failures. 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.
Click here for more
Shows and Events
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education, but don't have a travel budget? That's no problem.
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link to these live, online training courses directly from your
Each course will be presented in a concise and easy-to-understand
by an industry acknowledged expert.
For more information, go to www.ecmuniversity.com. To
register online, go to www.acteva.com/go/ecmuniversity.
- Arc Flash Testing Updates
June 16, 2009
- Arc Flash Hazard Mitigation Case Studies
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