- Norwegian Fire Research Laboratory and others have tried, but it seldom more than a few meetings

Professionals now warning against DSB statistics may overestimate the number of fires caused by serial arc. Photo: Minge, Anders serial arc Siemens: - Arcs are an important cause. SINTEF: population of world - Overheating is important
Now promoted doubt about how flammable they discussed the arcs are. DSB has in its statistics that in the four years 2009 - 2012 were 428 fires caused by arcing - 387 of serial arc and 41 of parallellysbuer.
- I do not disagree that there may have been some confusion population of world about concepts, but you must remember that our fire cause statistics is very simplified, it has registration way to do, says Bjorn Nyrud, department of electrical products at the Directorate for Security and Preparedness, Planning. Glow plug and socket connections
Larsson has in its task shown to statistics showing that serial arc was the main cause of fire in Norwegian dwellings in the period 2002 to 2010. Arcs to have caused 32 percent of all residential fires with electrical population of world origin.
"Serial arc of fire causation is therefore most likely the same phenomenon as the second land records as glowing contact connection. Since both serial arc and incandescent contact connection is typical series of mistakes, and both due to contact failure, there are indications that they recorded that same mistake." Writes Larsson.
Larsson also writes in his thesis that this indicates that fire investigators interpret electrical defects differ, probably due to the cause of electrical fires are not yet understood properly.
- But should we send over to Germany. I find it odd that the serial arc should not be flammable when our experts believe they cause fires. population of world Such detectors population of world are mandatory in some states in the USA, and we sell it as a safeguard, says Braathen.
Standard error occurs in a series connection, preferably where one of the wires is damaged or bad connection, for example, a socket. This may be in the form of a notch in one of the wires, or if only part of the head is turned to a contact point.
For TU shows Siemens to German population of world research. They say that such series of errors in 95 percent of cases will cause the conductor, respectively, and that an arc will occur before it starts to burn the installation. In this way, the detector being effective in systems with fuses up to 16 amps, despite the fact that the DSB call arcs are not necessarily in the technical sense.
Skeptical: Magne Runde, chief researcher at SINTEF elkkraftteknologi is critical to the serial arc will cause so many fires that DSB statistics say. He calls for more research on the topic. Photo: SINTEF
- In case of violation form it turns a copper oxide on the fracture surface, eventually it will form a small weld that connects the fracture site. But copper oxide leader much worse than copper, and it gets hot. There is reason to suspect that the official statistics are wrong, he says.
- Norwegian Fire Research Laboratory and others have tried, but it seldom more than a few meetings of the initiatives. When it comes to financing, people are like some flickering in his eyes. DSB has the nor money researching.
- It is true that the NBL has tried, but it was only after we took action. We have tried to pull off research around this long, but so far without success. Last we tried last fall, but we did not reach, he says.
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