Inagi City

Let's install a seismic breaker!

Last updated: June 10, 2020

1. Electrical fires during large-scale earthquakes

Electricity is involved in many of the causes of fires that occur after large-scale earthquakes.

Image: Causes of electrical fires during large-scale earthquakes
Causes of electrical fires during large-scale earthquakes

・Fire caused by damaged wiring, etc. ・Fire caused by a broken cord, etc. ・Incandescent light falls over and ignites flammable materials ・Flammable materials that fall over and come into contact with a heater and ignite ・Aquarium falls over and the heater ignites flammable materials ・Aquarium falls over and water splashes onto an outlet, causing a fire ・Fire caused by overheating due to overload
The installation of earthquake-sensitive circuit breakers is an effective way to prevent electrical fires.

2. What is a seismic breaker?

If a certain level of shaking is detected during an earthquake, the device automatically cuts off power to the home. Installing one in your home can help prevent a fire from starting or spreading to other homes, and reduce the damage caused by a fire.

In order to prevent electrical fires caused by earthquakes, it is effective to shut off the breaker when evacuating. Since it may not be possible to shut off the breaker in an emergency immediately after an earthquake or when you are away from home, it is a good idea to install an earthquake-sensitive breaker.

3. Types of seismic breakers

The main types of seismic breakers are:

Image Types of earthquake-sensing breakers
From the Ministry of Economy, Trade and Industry's "Earthquake Breaker Dissemination Awareness Flyer (April 2019 Edition)"

・Distribution board type (built-in type)
A sensor built into the distribution board detects shaking and turns off the breaker, cutting off electricity.

・Distribution board type (retrofit type)
This type has an external seismic function attached to the distribution board, and the sensor detects shaking and turns off the breaker to cut off the electricity.
・Outlet type A sensor built into the outlet detects shaking and cuts off electricity from the outlet.
・Simple type <br id="11"/>Turns off the breaker and cuts off electricity when a spring is activated or a weight falls.

Image Example of outlet type
Example) Outlet type

Image Simple type example
Example) Simple type

Image Example of emergency lights (power outage lights)
Example) Emergency lights (power outage lights)

Note) Care must be taken when installing devices such as distribution board types that shut off all electricity in the home in the event of an earthquake, as they may have an impact on medical equipment, etc. Also, if an earthquake occurs at night, lights may go out and prevent you from quickly and safely evacuating outdoors, so prepare emergency lights.

Inquiries about this page

Inagi City Fire Department Headquarters Disaster Prevention Division Phone: 042-377-7119