Comments Sought on
EC&M University's Final Online Arc Flash Course
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Code News Update
Comments Sought on Proposed
As published in the June issue of NFPA News, the
following Tentative Interim Amendment (TIA) has been proposed to the
NFPA 110-Proposed 2010 Edition, Standard for Emergency and
Standby Power Systems
TIA Log No. 965
Reference: 126.96.36.199.3(a) and 188.8.131.52.4
Submitter: David Stymiest, Smith, Seckman, Reid, Inc.
1. Revise section 184.108.40.206.3(a) as follows:
"When the EPSS consists of paralleled EPSs, the quantity of EPSs
intended to be operated simultaneously shall be tested simultaneously
with the building load for
a 2-hour period the test period
identified in Section 220.127.116.11.3(j)."
2. Revise section 18.104.22.168.4 as follows:
"The data specified in 22.214.171.124.3(d), (e), (g), (h) and (i) shall be
recorded at first load acceptance and every 15 minutes thereafter until
the completion of the
2-hour test period identified in
The "Emergency Nature" text for this TIA states: Section
5.2(a) is cited as the rationale on which to base the emergency nature
of this proposed TIA. This section states, "The document contains an
error or an omission that was overlooked during a regular revision
To review the "Submitter's Substantiation" text for this proposed
here and review the text on pages 5 and 6.
This TIA has been published for public review and comment. Comments
should be filed with the Secretary,
Standards Council by July 17, 2009. No form is required, but
your comments should be submitted on company letterhead. Please
the TIA number when submitting your comments. The Standards Council
review the technical committees’ ballot results, the public comments,
and any other information that has been submitted when it considers the
issuance of the TIA at its August 4-6, 2009 meeting.
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: Missing and misapplied items
By Mike Holt
Q. Do we still have to bond the deck of an
outdoor swimming pool if the deck is constructed of pavers?
Visit EC&M's Web
site to see the answer.
By Steven Owen
When installing feeder conductors for a stage or set
(per Art. 530), an issue arises regarding the size of the overcurrent
protection devices for the feeder conductors. Here's the situation.
The building is used primarily for motion picture production. The
feeder conductors from the substation to the stages are protected by
overcurrent protective devices (OCPDs) that are located in the
substation. The overcurrent devices are multi-pole units. The
load is 500A, continuous. The feeder conductors consist of 2 sets of
400kcmil per phase, THHN or THWN conductors (the dual insulation rating
on the conductor) installed in parallel in two separate raceways. For
the purposes of ampacity adjustment, the neutral conductor in this
example is not considered to be current-carrying.
What is the minimum conductor size required for the feeder
conductors, and what is the maximum size OCPD setting permitted per the
above-referenced section of the Code?
- 4/0 AWG; 600A rating or setting of the OCPD.
- 300kcmil; 2,280A setting of the OCPD.
- 400kcmil; 800A rating or setting of the OCPD.
- 400kcmil; 2,680A setting of the OCPD.
Web site for the answer and explanation.
Cool Electronic Cabinets
Beat the 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
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
Enroll In EC&M University's
Final Online Arc Flash Course
Need Arc Flash prevention training and continuing
education, but don't have a travel budget? That's no problem.
EC&M University's e-Training Center is the answer! Just link to
this live, online training course directly from your computer. The
course will be presented in a concise and easy-to-understand manner 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 Hazard Mitigation Case Studies
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