Officials said it probably had begun with electrical arcing caused by debris on the tracks, perhaps an umbrella.

Similarly, metallic sensors cannot be used in microwave ovens because of the danger of electrical arcing.

Moving the handle slowly back through the notches (called "back-notching") can result in damage to the controller circuits caused by electrical arcing.

Examination of the wreckage showed electrical arcing on the basket and one of the four propane cylinders, consistent with a power line strike.

The radio utilized electron tubes and was pressurized to prevent electrical arcing at high altitudes.

The origin of fire was a bathroom on the first floor, and no electrical arcing, no accelerants were detected.

The contamination was eventually cleared, as the material was eroded by electrical arcing, sublimed by outgassing, or simply allowed to drift out.

Care must be taken to distinguish between electrical arcing and copper that melted due to the high temperatures of the fire.

The term "electrical arcing", in fire investigation, is often used to refer to "melted copper that indicates that electrical arcing occurred".

"There was no electrical arcing in the pumps," he said.