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By Joe Sesniak, IAAI-CFI, IAAI-CI, CFEI, GIFireE

Loose electrical connections at screw terminals can create an increase in resistance, which promotes development of oxide layer(s) on the affected metals and localized heating. While the oxides are conductive (meaning the circuit will still “work”) its resistance is higher than that of the original metals involved (NFPA 921, 2014)[1]. The nature of the heating results in a locally high “watt density” and creates a potentially competent ignition source for proximal fuels (DeHaan, J., Icove, D., 2012)[2]. Recent literature, including works by Benfer and Gottuk (2013)[3], Korinek and Lopez (2013) [4] and Shea (2006)[5], provide detailed explanation of the chemical and physical processes of oxidation (copper I and copper II oxides) and corrosion associated with high resistance or “glowing” electrical connections. It is the visible effects of such localized high resistance heating on the receptacle terminals, and the persistence of these effects in a post-flashover fire environment, that are the subject of this paper. INTRODUCTION In this research, glowing connections were created on multiple electrical receptacles to produce heat effects on only one line side terminal connection of each receptacle. The purpose of this experiment was not to determine how heat effects manifest themselves on the terminals of electrical receptacles and associated conductors. The focus of this study was to determine whether or not the known effects persist beyond flashover at a visually perceptible level. This information is of importance to the fire investigator in the field. The reader should note that this work is considered preliminary. Potential variables were minimized, such as having conductors terminated on all screw connections and having multiple receptacles with varying loads on the same circuit. Further testing is required to evaluate the significance of such variables. Nonetheless the results of this testing are notable. The “heat damaged” test receptacles were installed in metal junction boxes and exposed to a room and contents fire that transitioned through flashover. The compartment was not instrumented. The point of origin and fuel load arrangement was selected to expose the receptacles to varying levels and duration of heat intensity. The post-flashover persistence of the effects of a glowing connection was subsequently visually evaluated. The intent was to provide fire investigators a resource for the preliminary field evaluation of electrical receptacles as a potential ignition source.

Loose electrical connections at screw terminals can create an increase in resistance, which promotes development of oxide layer(s) on the affected metals and localized heating. While the oxides are conductive (meaning the circuit will still “work”) its resistance is higher than that of the original metals involved (NFPA 921, 2014)[1]. The nature of the heating results in a locally high “watt density” and creates a potentially competent ignition source for proximal fuels(DeHaan, J., Icove, D., 2012)[2].  Recent literature, including works by Benfer and Gottuk (2013)[3], Korinek and Lopez (2013)[4] and Shea (2006)[5], provide detailed explanation of the chemical and physical processes of oxidation (copper I and copper II oxides) and corrosion associated with high resistance or “glowing” electrical connections. It is the visible effects of such localized high resistance heating on the receptacle terminals, and the persistence of these effects in a post-flashover fire environment, that are the subject of this paper.

INTRODUCTION

In this research, glowing connections were created on multiple electrical receptacles to produce heat effects on only one line side terminal connection of each receptacle. The purpose of this experiment was not to determine how heat effects manifest themselves on the terminals of electrical receptacles and associated conductors. The focus of this study was to determine whether or not the known effects persist beyond flashover at a visually perceptible level. This information is of importance to the fire investigator in the field. The reader should note that this work is considered preliminary. Potential variables were minimized, such as having conductors terminated on all screw connections and having multiple receptacles with varying loads on the same circuit. Further testing is required to evaluate the significance of such variables. Nonetheless the results of this testing are notable.The “heat damaged” test receptacles were installed in metal junction boxes and exposed to a room and contents fire that transitioned through flashover. The compartment was not instrumented. The point of origin and fuel load arrangement was selected to expose the receptacles to varying levels and duration of heat intensity. The post-flashover persistence of the effects of a glowing connection was subsequently visually evaluated. The intent was to provide fire investigators a resource for the preliminary field evaluation of electrical receptacles as a potential ignition source.

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From Out of the Abyss...

This week’s article from the past is titled Incendiary Fires Can Be Spotted and was written by Benjamin Horton, CPCU, who was President of the National Adjuster Traing School in Louisville, Kentucky..  It is taken from the Decembe 1968 Vol. XVI No.5 issue.

Incendiary Fires Can Be Spotted 

In the new issue of NFPA Journal®, President Jim Shannon said the Association will focus on the leading causes of home fires, including cooking. "We also need to continue to push hard for home fire sprinklers. That's still a large priority for NFPA, and we plan to work very aggressively in 2014 on our residential sprinkler initiative," he said.

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NFPA 921, Guide for Fire and Explosion Investigations plays a fundamental role in fire and explosion investigations. A new edition of NFPA 921 is scheduled to be published in 2014. For years, this document has played a critical role in the training, education and job performance of fire and explosion investigators. It also serves as one of the primary references used by the National Fire Academy to support its fire/arson-related training and education programs. It is imperative that investigators understand the scope, purpose and application of this document, especially since it will be used to judge the quality and thoroughness of their investigations.

NFPA 921, Guide for Fire and Explosion Investigations plays a fundamental role in fire and explosion investigations. A new edition of NFPA 921 is scheduled to be published in 2014. For years, this document has played a critical role in the training, education and job performance of fire and explosion investigators. It also serves as one of the primary references used by the National Fire Academy to support its fire/arson-related training and education programs. It is imperative that investigators understand the scope, purpose and application of this document, especially since it will be used to judge the quality and thoroughness of their investigations.

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SAN DIEGO - A Team 10 and Scripps News investigation found arson fires are not investigated properly in many American cities -- including San Diego -- due to a chaotic patchwork of reporting systems and standards.

Many deliberately set building fires are not reported to the federal government.

Nationally, just 5 percent of all residential building fires are intentionally set, according to the National Fire Incident Reporting System, which is part of the Department of Homeland Security.  Data collected by Scripps News suggests the national arson rate to be significantly higher.

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White Paper

Study by: Albert Simeoni, Zachary C. Owens, Erik W. Christiansen, Abid KemalExponent, Inc. USAMichael Gallagher, Kenneth L. Clark, Nicholas SkowronskiNorthern Research Station, USDA Forest Service, USAEric V. Mueller, Jan C. Thomas, Simon Santamaria, Rory M. HaddenSchool of Engineering, University of Edinburgh, UK

Albert Simeoni, Zachary C. Owens, Erik W. Christiansen, Abid Kemal Exponent, Inc. USA Michael Gallagher, Kenneth L. Clark, Nicholas Skowronski Northern Research Station, USDA Forest Service, USA Eric V. Mueller, Jan C. Thomas, Simon Santamaria, Rory M. Hadden School of Engineering, University of Edinburgh, UK

ABSTRACT

Two experimental fires, with contrasting intensities, were conducted in March 2016, in the Pinelands National Reserve (PNR) of New Jersey, United States in order to provide a preliminary assessment of the reliability of the fire direction indicators used in wildland fire investigation.  The experiments were part of a larger project intended to measure firebrand production in a forested ecosystem.  As part of this project, fire behavior, as well as the environmental and fuel conditions were also measured.  Two burn parcels, covering an area of approximately 30 hectares each, were ignited from unimproved forest roads which delimited them.  The forest canopy was comprised primarily of pitch pine with intermittent oaks.  The understory contained a mixed shrub layer of huckleberry, blueberry, and scrub oaks. In order to explore a wide range of indicators, objects such as bottles, cans and small fence elements were planted in the burn area, and photographed before and after the fire.  To obtain an accurate measure of pre- and post-fire fuel properties, fuel load, fuel bulk density, and fuel moisture content were also measured. In addition, environmental data (wind velocity and direction, air temperature and humidity) were recorded.  The fire behavior can be reconstructed using measurements of fire rate of spread, fire front temperatures, fire front geometry, and heat fluxes.  Video and infrared cameras were used to document the general fire behavior in selected locations.  This paper represents the first step in the analysis of the fire indicators and focuses on the more intense of the two burns and on the appearance of the macro- and microscale fire pattern indicators.  A majority of the indicators were assessed, although the configuration of the burn parcels, the ignition technique, and precipitation immediately following the fires limited a full study.  The results show that some fire direction indicators are highly dependent on local fire conditions and fire behavior and may be in contradiction with the general spread of the fire.  Overall, this study demonstrates that fire pattern indicators are a useful tool but must be interpreted in the frame of a general analysis of the fire, combined with a good understanding of fire behavior and fire dynamics.

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March 5-8, 2018

  CCAI Training Seminar

IAAI - ITC 2015

IAAI President Peter Mansi welcomed everyone to the International Association of Arson Investigators 66th International Training Conference in Chicago, Illinois this past week, May 18th – 22nd.  Around 600 attendees were on hand for a great schedule of classes during the week.  Approximately 40 of those attendees were from Central America countries requiring translation throughout the week.  CCAI Director Robert Rullan gave a presentation on “CSI” as part of the training as well as assisting with the translation needs of the students.  

On opening day, CCAI’s 1st VP, Dale Feb, taught a four-hour class titled “Hearth Products Ignition Source or First Fuel Ignited”.  CCAI Member Steve Carmen taught two two-hour classes; “Math for Fire Investigators” and “Elevated Fire Origin Research”.  CCAI Member John DeHaan joined up with Instructors Chris Connealy and Kelly Kistner in presenting “Arson Convictions:  Reviewing the Science – The Texas Experience”.  Jamie and Cameron Novak were on hand to set things on fire in "Burn to Learn".  Rounding out the week was Mike Bryant teaching "Investigative Interviewing for Fire Investigations. Many other instructors joined in the training and in all, four separate tracks of education were presented throughout the weeklong conference.

CCAI President Eric Emmanuel represented the CCAI Chapter at the “Presidents Reception” on Sunday night, again during “Opening Ceremonies” on Monday Morning, at the “Chapters Presidents Luncheon” on Tuesday, during the IAAI “Annual General Meeting” on Tuesday afternoon and at the “Awards and Installation Banquet” on Tuesday night.  He was seen throughout the week engaging different individuals in conversations and promoting CCAI.

IAAI hosted a Vendor Room where approximately 30 different companies set up display booths and provided valuable information to the attendees.  A very active Spousal Program visited some of the many sights and attractions that Chicago has to offer.  Monday was spent at the Local Boutiques and Hummel Museum.  On Tuesday, the highlight of the week, they visited the Chicago Fire Academy and Fire Museum.  Wednesday and Thursday were spent exploring many of the hot spots around the “Windy City” including the Navy Pier, Sky Deck Chicago, Millennium Park and the Cloud Gate Sculpture, Art Institute Museum, Field Museum of Natural History, Museum of Contemporary Art, Shedd Aquarium and Adler Planetarium.  The week included lunches at the Hard Rock Café, Rainforest Café, and many of Chicago’s authentic hot dog and pizza restaurants.  Before departure on Friday, the group held a farewell breakfast at the hotel.  Approximately 28 people participated in the Spousal Program.

During the IAAI “Annual General Meeting”, elections were held.  Dan Heenan (Nevada) was sworn in as President, George Codding (Colorado) was sworn in as 1st VP and Scott Bennett (Ohio) was elected as 2nd VP.  Darrell Sanders (Louisiana), William T. Moreland (Florida) and Kevin Crawford (Colorado), Chris Van Vleet (Kansas) were elected to the serve three-year terms on the IAAI Board of Directors.  Joe Sesniak (Arizona) was elected to serve a three-year term on the IAAI Foundation Board of Directors, and David Snead (Texas) was reelected as president of the Foundation.  Immediately following the election, nominations were opened for 2016.  CCAI Board Member Robert Rullan was nominated to run for a Director Position next year.

CCAI members Troy Morrison, Jim Allen, Kathryn Varner, Don Perkins, Dennis Fields, Bill Kilpatrick and his wife Debbie, Tom Fee and others made a great showing for California Chapter 22.

Superior Court of Arizona Maricopa County - Under Advisement Ruling

UNDER ADVISEMENT RULING

The Court has had under advisement Plaintiff Barbara A. Sloan’s (“Sloan”) Rule 60 Motion.  Having read and considered the briefing and having heard oral argument, the Court issues the following ruling.

Ruling Document 

CoScentrix Expands Recall of DD Brand Candles; Exclusively at Hobby Lobby

Description

This recall involves four types of DD branded single-wick candles: Mason jars in 5- and 12- ounce sizes, decorative jars in 10- and 20-ounce sizes, 13-ounce coffee tins and 13-ounce jars with a holiday theme. The candles were sold in a variety of fragrances and colors.

The 5-ounce Mason jars are 2.25 inches wide by 3.75 inches high. The 12-ounce Mason jars are 3 inches wide by 5 inches high. The jars have gray metal lids. The DD logo and the word Handcrafted are in raised letters on the front of the jars. The candle fragrance and size are printed on a hang tang attached to the mouth of the jars.

The 10-ounce decorative jars are 4 inches wide by 3 inches high. The 20-ounce decorative jars are 5 inches wide by 4 inches high and hold a candle. The jars have gray metal lids with the DD logo in raised letters on the top. The candle fragrance and size are printed on a rectangular label on the front of the jar.

The 13-ounce coffee tins are 3.5 inches wide by 4 inches high and have a silver metal lid. The candle size and fragrance are printed on a label that wraps around the outside of the tin.

The 13-ounce holiday candle jars are 3.75 inches wide by 4 inches high and have silver metal lids with the DD logo in raised letters on the top.  The DD logo inside a floral wreath, the fragrance and size are printed directly onto the front of the jar in silver.

See the full details at CPSC

NHTSA Recall - Sub-Woofer Electrical Short

Summary:

Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain model year 2011-2012 Toyota Avalon vehicles manufactured February 9, 2010, to October 22, 2012.  In the affected vehicles, the sub-woofer speaker located in the trunk may experience an intermittent electrical short which may cause damage to the integrated circuit (IC) in the audio amplifier.  In some cases, the damaged IC may allow a constant electrical current flow to the sub-woofer.

See the full details at NHTSA

NHTSA Recall - Exhaust Pipe Leak may Result in Fire

Summary:

Nova Bus (Nova) is recalling certain model year 2007 LFS transit buses manufactured January 1, 2007, to December 31, 2007. In the affected vehicles, the band clamp on the flex pipe between the turbocharger and the diesel particulate filter may be incorrectly located allowing the exhaust pipe to leak hot exhaust gases onto nearby components.

See full details at NHTSA

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