Be cautious of unusual fires

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Page ID1012079  Updated on September 10, 2023

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About Tracking Phenomena

The tracking phenomenon occurs when dust or moisture accumulates between the electrodes, such as in the prongs of a plug, causing small sparks to repeatedly occur and leading to a short circuit between the electrodes. When a short circuit happens, flames can erupt vigorously, potentially igniting nearby items like curtains and causing a fire.
The tracking phenomenon can occur regardless of whether the device is in use, as long as the plug is inserted into the outlet. Please pay attention to the following to prevent tracking phenomena.

  • Occasionally unplug the plugs that are left inserted in outlets and power strips, and wipe them with a dry cloth.
  • After using the equipment, turn off the switch and unplug it from the outlet.
  • If the plug and cord are hot, stop using them immediately and have them checked at an electrical store.
Illustration: Tracking Phenomenon Picture
Tracking Phenomenon

About Contraction Fires

The phenomenon of sunlight being reflected or refracted by lenses or mirrors and converging at a single point is called the convergence phenomenon, and if there are flammable materials at that location, it can lead to a fire. To prevent convergence fires, please pay attention to the following.

  • Do not place mirrors, vases, or other items that may cause a converging phenomenon in areas where sunlight enters, such as near windows.
  • When going out, close the curtains to block out light.
  • Be careful with bicycles, motorcycles, and water-filled plastic bottles outdoors.
  • In the morning and evening, as well as during winter, the sun is low in the sky, making it easier for sunlight to penetrate deep into the room, so be careful.
Illustration: Converging Fire Illustration
Contraction Fire

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Inquiries about this page

Inagi City Fire Department Prevention Division
〒206-0802 2111 Higashi-Naganuma, Inagi City, Tokyo (Inagi Fire Station)
Phone number: 042-377-7119 Fax number: 042-377-0119
Contact Us for the Inagi City Fire Department Prevention Division