| CONTENTS
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City of Phoenix Now
Enforcing 2008 NEC
What's Wrong
Here?
Code Q&A
Code Quiz
Enroll In
EC&M University's Online Arc Flash Courses
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Code News Update
City of Phoenix Now Enforcing 2008
NEC
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
the
Code:
- 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
NMS
II. Installation
334.10 Uses Permitted and 334.12 Uses Not Permitted
To review the details of the amendments in PDF format, click here.
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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: Wireless A/C controls?
Code Q&A
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
ruling?
Visit EC&M's Web
site to see the answer.
Code Quiz
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
ungrounded
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
is
this example?
- 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
conductor
Visit EC&M's
Web site for the answer and explanation.
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Shows and Events
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