OfficeChristmas_2017
image image image image image image

Vytenis Babrauskas, Ph.D

Abstract

Arc mapping was first introduced in the 2001 edition of NFPA 921 and was subsequently expanded so that in the recent editions it constitutes one of the four main methods for determining the origin of a fire. Careful consideration of engineering principles and large-scale experimental studies on the subject indicates that the relevance and prominence of arc mapping as a leading indicator of fire origin is greatly overstated. The technique is valid and applicable only in some very limited scenarios. Yet it has seen very extensive use in recent years by investigators preparing fire reports. In many cases, such attempted use of arc mapping is based on incorrect and invalid hypotheses, which are often implicitly assumed to be true instead of being explicitly stated. The following are myths: (i) An abundance of arc beads at a given locale means that fire originated in that area, while a paucity of arc beads indicates that it did not. (ii) When multiple arcs are present on a circuit, the direction of arcing will necessarily proceed upstream towards the power source. (iii) If an appliance is the victim of a fire, internal arcing will be primarily near the exterior of the unit, while arcing deep inside indicates a fire origin at that place. NFPA is urged to revise NFPA 921 to eliminate arc mapping as one of the four main methods for establishing fire origin, and to subsume it under the more general category of “fire patterns.” In addition, it is important that NFPA 921 reduce the implied general utility of the method and provide more explicit information on its interpretation and its limitations and on the circumstances under which it may be a valid method for assisting in the determination of the fire origin.

Read more...

Vytenis Babrauskas, Ph.D.

Abstract

Short circuits to building wiring can happen due to electrical mishaps, or as a result of fire impinging on the wiring. In either case, this may cause arcing.  It is sometimes erroneously assumed that this must produce signs of ‘electrical activity,’ which is a term often used by fire investigators to mean discernable arc marks or arc beads.  While such artifacts may indeed be produced, it is shown that it does not necessarily happen in every case.  Shorting and arcing (whether due to fire or due to an accident) may occur without leaving physical evidence that is discernable as an arc bead.  Ejecta also may, but do not have to be produced.  Some variables have been identified which can influence the size of arc beads, when arc beads are produced.  But stochastic aspects dominate, and no predictive correlations can be expected.  It is also shown that there are no prediction methods available to establish if an arc locale will result in severing or welding together of conductors.

Read more... 

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.

Read more...

From: The Desk of Scotty Baker

To: The CCAI Training Committee

Thank You

Over the last several training seminars, even as an old hand, I have learned new information concerning fires and how they do what they do.

 

Get started today

Attention - CCAI's next training seminar is scheduled for March 6-8, 2017 - Attention

The focus will be on Interviewing, Report Writing and Fundamentals

Register now online or Fill out the registration form and email, mail or fax it

             Group-photo-web_10-2016

 

Zero-clearance fireplaces a main source of fires

Chief: Almost one-third of High Desert house fires caused by zero-clearance fireplaces

A Helendale house fire earlier this month that caused $50,000 in damages was the latest in a string of residential blazes to be traced to a zero-clearance fireplace, a County Fire official said.

Battalion Chief Warren Peterson blames zero-clearance fireplaces for roughly 30 percent of house fires responded to by San Bernardino County Fire.

Read more...

USDC Pennsylvania Permits Vaporizer Fire Case to Proceed to Trial

In MUTUAL BENEFIT INSURANCE COMPANY v. KAZ, INC.,Civil Action No. 1:12-CV-2108 (Feb. 20, 2014) at http://www.leagle.com/decision/In%20FDCO%2020140221C81 was a civil action filed by plaintiff Mutual Benefit Insurance Company ("MBIC"), as subrogee of Betty and Allen Miller, alleging strict liability, negligence, and breach of warranty against defendant Kaz, Inc. ("Kaz"). MBIC seeks reimbursement of monies paid pursuant to an insurance policy issued to the Millers, whose house was damaged in a fire. MBIC alleged that Kaz designed, manufactured, distributed, and sold a vaporizer that caused the fire. Presently before the court is Kaz's motion in limine to exclude the testimony of one of MBIC's submitted experts, Randolph Marshall of Marshall Forensic, LLC. For the following reasons, the court denied the motion.

Read more... 

The Six Motives for Firesetting

At any point during your career as a fire investigator you will be assigned to investigate an incendiary fire. When the investigator arrives on the scene, information about the incident will be coming from a variety of sources, including police, firefighters, witnesses and the occupants or owner. It is critical to sort all of the information and analyze it properly. During the investigation we must use critical thinking and ask many questions such as, why was this fire was deliberately set? Why was the home, business or vehicle the target of an arsonist? What was the motivation of the arsonist?

Read More...

BRP Recalls Ski-Doo and Can-Am Lithium-ion Rechargeable Batteries and Heated Gloves Due to Fire Haza

Description

This recall involves BRP Ski-Doo and Can-Am heated gloves and replacement Lithium-Ion rechargeable batteries. The gloves are only available in black and are sold with two lithium-ion rechargeable batteries and a charger. The gloves have either “ski-doo” or “can-am” on the pointer finger and on the wrist band of each glove. Both gloves come in size XS, S, M, L, XL, 2XL, 3XL. The battery pack is located on the zipped pouch on the wrist of each glove. Each battery is wrapped in white plastic with black writing which includes the warning information.  The recalled product codes can be found on the label sewn inside of the gloves. Recalled product codes are 446247 for the Can-Am heated gloves, 446248 for the Ski-Doo heated gloves and 4880580001 for the two Lithium-ion rechargeable batteries that are sold separately.

 

Read more...

Genie Recalls Garage Door Openers Due to Fire Hazard

Description

This recall involves Genie, models PowerMax 1200 and 1500, and Genie Pro, models TriloG 1200 and 1500, screw drive garage door openers. The garage openers are gray and have a rating of ¾ HPc for the models ending in 1200 and 1 HPc for the models ending in 1500. “Genie” and the model name appear on both sides of the opener. The serial numbers are printed on a label located on the side opposite to the light.

 

Read more...

More Articles...

Page 9 of 17

9
Banner

Advertise Your Business Here!

 

CCAI Advertisers enjoy unprecedented exposure to professionals in the public and private sector with tens of thousands of targeted visitors each year looking to arson.org for critical information on the state of fire and arson investigation in the United States and worldwide!  

Banner ads should be formatted to 699 x 125 pixels, JPEG or animated GIF or Flash SWF, 100Kb or less. 

Annual advertising rates available.

Join CCAI Today!

Member Benefits:  

~Training in Fire/Arson
   Investigation
~Semi-Annual
  Training Seminars
~Regional Roundtable
  Meetings held
  throughout the State
~Fire Investigative Resources
~Networking between public
  and private agencies:
       Fire, Police, Insurance,
       Private Investigators,
       Attorneys
~Legal Updates
~Certification Development
~Annual Membership Card
~CCAI-CFI Program
~Field Training Exercises
~Videos on
   fire/arson investigations
~Members only area
~Attend Seminars at a
  greatly reduced rate!
~Weekly E-Newsletter
Last month January 2017 Next month
S M T W T F S
week 1 1 2 3 4 5 6 7
week 2 8 9 10 11 12 13 14
week 3 15 16 17 18 19 20 21
week 4 22 23 24 25 26 27 28
week 5 29 30 31
California Certified Fire Investigator

 

 

 

Location

1279 North White Avenue 
Pomona, California 91768 
Phone:  (909) 865-5004
Fax (909) 865-5024 
8:00 am - 5:00 pm 
Monday - Friday

 

 

 

 

Disclaimer

This is the official website of the California Conference of Arson Investigators.

The information published on this website... more... 

 

Login