In the event of flooding, the electrical risk is one of the first dangers to be taken into account. If your electrical panel is affected by water, the top priority is to secure the premises before any other intervention. Water and electricity are an extremely dangerous combination, which can lead to electrocution, fire or irreversible material damage. Drawing on my 15 years’ experience in the electrical field, I’d like to tell you what to do in the event of flooding affecting your switchboard, and why it’s essential to call in an electrician as soon as possible.

Why is a flooded switchboard dangerous?

When water comes into contact with an electrical panel, it can :

• Create immediate or delayed short circuits
• Damage circuit breakers, fuses and internal components
• Leaving conductive deposits that cause arcing after drying
• Fault the entire system, even if the damage is not visible to the naked eye.
  

Unlike a conventional breakdown, water damage is often invisible at first glance, but extremely dangerous in the long term if left unchecked.

What to do in the event of flooding affecting your electrical panel?

1. Never approach a submerged or damp switchboard
   If the switchboard is still live, you risk electrocution by approaching it. Do not touch anything if you smell moisture or if water is reaching the wall fittings.
   
2. Switch off the main power supply if safe to do so
   If your main circuit breaker is safe to reach (dry area, no water on the floor), switch off the main power supply. Otherwise, wait for a professional.
   
3. Evacuate occupants and secure premises
   Keep all people away from the flooded area, especially children and pets. Restrict use of electrical equipment until inspection is complete.
   
4. Immediately call an emergency electrician
   A professional can intervene in complete safety, cut off the electricity if necessary from the outside, and assess the real risks before putting the system back into service.
   

What not to do

• Never attempt to dry an electrical panel yourself with a hair dryer or heating appliance.
• Don’t turn the power back on “to see if it works”.
• Do not replace a circuit-breaker or plug in an area that is still wet.
  

These mistakes are not only ineffective, but dangerous, even several hours after the flood.

After the emergency: diagnosis and safety restoration

Once the water has been drained, an electrician will :

• Test all circuits to identify damaged areas
• Replace oxidized circuit breakers or components
• Check cable insulation with a megohmmeter
• Remediate or replace electrical panel if necessary
  

Some walls may also have to be opened if ducts or junction boxes have been flooded.

Anticipating risks in flood-prone areas

If you live in a flood-prone area, you can take preventive measures:

• Install the electrical panel at an adequate height
• Install a very high-sensitivity differential circuit breaker (10 mA)
• Avoid electrical conduits on the floor or in basements
• Create a priority circuit that can be cut quickly
  

Conclusion: water and electricity never mix

In the event of flooding, your first instinct should always be to secure the electrical installation. The switchboard is the heart of your home network: if it’s affected, everything else could be compromised. Don’t take any chances.

For a fast, safe and compliant intervention, call on our emergency electrician service or contact our team here.