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April 7, 2011
Vol. IX, No. 7

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   EC&M's CodeWatch
  Today's Headlines
 Vote for the 2011 Product of the Year and Qualify for a Chance to Win $100!
 EC&M's 2011 Top 40 Electrical Design Firms Listing
 Vermont and the 2011 NEC
 What's Wrong Here?
 Code Q&A
 Code Quiz

Important Notice


Your vote will help us identify the 2011 Platinum, Gold, and Silver Product of the Year award winners. EC&M subscribers, simply review the products from the 2011 EC&M Product of the Year category winners list, and then choose your favorite from the drop-down menu. Three lucky voters will be randomly selected to receive $100.

The voting poll will remain open through 5 p.m. on May 20. Please, only one vote per EC&M subscriber. Any votes received from manufacturers, PR firms, or non-EC&M subscribers will not be counted.

Coming Up in EC&M


EC&M's 2011 Top 40 Electrical Design Firms If your electrical design business is one of the largest in the nation, your company may qualify to be on EC&M's annual listing of the Top 40 Electrical Design Firms. The May cover story will compile the results of a proprietary survey and rank the firms by sales revenue. If your firm would like to participate, download a copy of the survey. Thanks!

Code News Update


The Electricians' Licensing Board is working with the Division of Fire Safety to update the Vermont Electrical Safety Rules to include the 2011 National Electrical Code (NEC), with amendments focusing on the following topics:

  • Expanding the definition of the word "structure" in Art. 100.
  • Modifying the text of 110.3(A)(1).
  • Deleting 110.24, the new field marking requirement for available fault current.
  • Expanding the GFCI requirements in dwelling units [210.8(A)] to include laundry equipment.
  • Expanding the GFCI requirements in other than dwelling units [210.8(B)] to include unfinished basements.
  • Modifying the text of 230.70(A)(1).
  • Adding text to 250.24(A)(5), which focuses on an overcurrent device that is not within sight of or within 30 ft of the building or structure being served.
  • Deleting and replacing some of the requirements for non-metallic-sheathed cables [Sections 334.10 and 334.12(A)].
  • Deleting and replacing the exception text in 400.8(4).
  • Adding a new Sec. 518.3(D) for the illumination of means of egress in assembly occupancies.
  • Deleting 520.5(C), which focuses on the wiring methods for theaters and similar locations.
The proposed changes can be viewed online on the Electrical Page of the Vermont Department of Public Safety / Division of Fire Safety website.

These rules are proposed to take effect this month. To achieve an orderly transition for compliance with these rules, the requirements of Sec. 406.4(D)(4) shall take effect Jan. 1, 2014.

Code Violations

What's Wrong Here?

By Joe Tedesco

Think you know how this installation violates the NEC?

Visit EC&M's website to see the answer.

Hint: Misused box

Code Quandaries

Code Q&A

By Mike Holt

Q. Is an equipment grounding conductor allowed to serve dual duty as a grounding electrode conductor?

Visit EC&M's website to see the answer.

Code Challenge

Code Quiz

By Steven Owen

What is the minimum size grounded conductor required for the following installation?

A service consists of a NEMA 3R service-rated fusible disconnect. The load supplied is a 100 hp, 460V, 3-phase motor for a pump in the middle of a field (with appropriate motor controls and equipment). The ungrounded service entrance conductors are 2/0 AWG XHHW. The electric utility supplied service is 3-phase, 4-wire grounded.

  1. 1/0 XHHW (70% of 2/0)
  2. 2/0 XHHW
  3. No. 1 XHHW (2 sizes smaller than 2/0)
  4. No need for a grounded conductor since the motor is 3-phase.
Visit EC&M's website for the answer and explanation.

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WHITE PAPERS

2011 Electroforecast
Notwithstanding recent lower-than-expected employment numbers and a mid-year stall in the housing market, the general U.S. economy has been showing some signs of recovery since the recession ended in June 2009. However, with its 12- to 24-month lag behind the general economy, non-residential construction is not expected to experience a substantial uptick in 2011. Read the complete 2011 EC&M Electroforecast.

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ON DEMAND MEDIA

Top Code Changes: 2011 NEC
EC&M has partnered with NEC expert Mike Holt to present a one-hour webinar covering the top 2011 NEC Code Changes. This event is available on demand here.

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