Electricity is indispensable in modern life, but electrical leakage can lead to fires and electric shock accidents. In many cases, electrical leakage progresses quietly at home, and some households carry serious risk without realizing it. This article clearly explains the causes, warning signs, inspection methods, and preventive measures for electrical leakage.
What Is Electrical Leakage and Why Does It Happen?
Electrical leakage is a phenomenon in which electricity escapes from its intended path through wiring or household appliances. The main causes of electrical leakage are as follows.
Aging or malfunctioning household appliances
Household appliances that have been used for many years are more likely to have deteriorated cords and insulation, making electricity more likely to leak. If an appliance has exceeded its average service life, consider arranging regular inspections or replacing it.
Contact with moisture or water
Water conducts electricity easily. Older appliances located near places where water is used, such as kitchens and wash areas, face a higher risk of electrical leakage due to moisture exposure.
Overload caused by too many plugs
If too many power sources are connected to a single outlet, power consumption can exceed capacity and lead to heat buildup and electrical leakage. Because cords are also more likely to be damaged, avoid unnecessary overuse of multi-plug connections.
Tracking phenomenon
This occurs when dust accumulates between the outlet and the plug, and added moisture causes discharge, resulting in electrical leakage or fire. It is important to clean around outlets regularly and unplug power sources that are not in use.
Faulty electrical work, building deterioration, salt damage, and animal damage
Electrical leakage can also be caused by insufficient insulation treatment, rainwater intrusion due to aging buildings, salt damage in coastal areas, or wiring chewed by rats and other animals. For older buildings, we recommend asking a qualified professional to inspect the electrical wiring.
Do Not Overlook the Signs of Electrical Leakage
If you notice any of the following signs, electrical leakage may be the cause. Check early.
- The leakage breaker trips frequently
- A sudden rise in electricity bills with no clear reason (such as an annual increase of more than 5,000 yen)
- A power outage occurs with a combination of appliances that previously caused no problem
- You feel a sharp tingling pain when touching metal parts
- Power outages are more likely to occur only on rainy days (possible rain leakage plus electrical leakage)
How to Check for Electrical Leakage: A Breaker Self-Check
You can use the breaker to check for electrical leakage by following these steps.
- Turn off all household appliances and unplug them
- Switch the ampere breaker (the large switch on the left) to “Off”
- Switch the leakage breaker to “On”
- Turn on each safety breaker one by one
- The circuit that causes the leakage breaker to trip is highly likely to be the affected area
Even if you identify the likely area, always ask a qualified professional to handle wiring repairs.
Main Risks Caused by Electrical Leakage
- Electric shock: If current passes through the body, it may lead to cardiac arrest or a fatal accident
- Fire: Heat buildup or sparks may ignite a fire inside walls or under floors
- Higher electricity bills: Costs rise because current continues to flow through routes that are not being used
Preventive Measures Against Electrical Leakage
- If household appliances have exceeded their average service life (roughly 7 to 10 years), consider inspection or replacement
- Clean dust around outlets regularly
- Reduce multi-plug connections and check cords regularly for damage
- Check the water resistance of appliances used near water, and avoid operating them with wet hands
- Have a qualified electrical professional inspect your electrical equipment once every 5 to 10 years
If you live in a rental property, you are required to promptly contact the landlord or property management company when electrical leakage is discovered. It is also helpful to review key points related to rental agreements for added peace of mind. For issues related to aging facilities, basic knowledge about building waterproofing and repairs may also be useful.
Frequently Asked Questions (FAQ)
- Q1. What should I do if the leakage breaker trips?
- Turn off all household appliances and unplug them, then identify the likely leakage point through a self-check and contact an electrical contractor.
- Q2. Does a sudden increase in electricity bills mean there is electrical leakage?
- Electrical leakage is one possible cause. If your electricity bill rises sharply even though your usage has not changed, carry out a leakage check.
- Q3. Can I repair electrical leakage myself?
- Wiring repairs require a licensed electrical professional. Always ask a qualified contractor to handle the work.
- Q4. Who pays for repairs if electrical leakage occurs in a rental property?
- As a general rule, electrical leakage caused by age-related deterioration is the landlord’s responsibility, but in some cases the tenant may be responsible if the issue was caused by negligence, such as overload from too many plugs.
- Q5. How much does an electrical leakage inspection cost?
- The usual cost for inspection and investigation by a contractor is around 5,000 to 20,000 yen. Additional repair charges may apply depending on the scope of work.
