Understanding what the ICP is, why it might trip, and how to respond when it happens is essential for keeping your home or business’s electrical installation in good condition and preventing risks. That’s why we at Endesa are answering the most common questions and doubts about this switch —so you can understand how it works and why it matters.

What is the power control switch (ICP)?

The ICP is a safety and protection device that’s part of the electrical panel. Its main function is to limit electricity consumption to the power level contracted with the energy company —that is, to ensure you don’t exceed the maximum kilowatts (kW) agreed upon in your energy plan.

This switch acts like a silent guardian: if power consumption goes beyond the contracted limit, the ICP trips and automatically cuts off the electricity supply, leaving the home or business without power until the issue is resolved. This prevents electrical overloads that could damage the installation or pose safety risks.

Since 2009, with the arrival of digital smart meters, many buildings no longer have a physical ICP, since power control is now integrated into the meter itself. However, older installations may still have this switch as a separate component inside the electrical panel.

What is the ICP for?

The ICP has several key functions, all centred on protection and safety:

• Protects the electrical installation: It prevents the household grid from overloading when too many devices are connected at once. This avoids overheating of wires and appliances that could cause fires or malfunctions.
• Monitors contracted consumption: It ensures that the user doesn’t exceed the power limit agreed upon with the distributor. This keeps the cost aligned with the terms of the contract and prevents unauthorised overuse of the grid.
• Ensures user safety: By cutting off or limiting electricity supply in the event of an overload, it helps prevent electrical accidents and protects people within the property.

In short, the ICP acts like a guard or supervisor —an essential component for maintaining household electrical safety and ensuring compliance with your energy contract.

Why does the ICP trip?

The ICP can trip for various reasons. So, understanding them is key to preventing it from happening repeatedly.

Excess consumption

This is the most common reason the ICP trips. For example, if you turn on the oven, ceramic hob, washing machine, and air conditioner all at once, the total consumption may exceed your contracted power. When that happens, the ICP activates and cuts off electricity to protect the system.

Temporary overloads

External power surges can also cause the ICP to trip —even without exceeding your contracted power. This can occur due to voltage spikes or grid saturation, not from your own household usage. If it happens frequently, it’s recommended to have your installation checked and contact your distributor.

Faults in the electrical installation

Short circuits, damaged cables, faulty connections, or circuits that are not properly dimensioned can trigger the ICP as a safety measure.

Electrical leakage or ground faults

Although this type of monitoring usually relates more to the residual current device (RCD), malfunctioning appliances or wiring issues can sometimes also cause power disconnections.

Faulty ICP

While less common, the ICP itself may become defective or poorly calibrated over time, resulting in false trips or unwarranted power cuts.

What to do when the ICP trips

When the switch trips, stay calm and follow these steps:

• Identify the cause: Check which electrical appliances were in use when the power went out and unplug them. If several high-consumption devices were on at the same time, it’s likely due to excessive power use —meaning you may need to increase your contracted power.
• Reduce consumption: Unplug nonessential appliances and keep only what’s necessary running.
• Check the electrical panel: Locate the switch and flip it back up if it’s down. If you have a digital meter, wait a few seconds before reconnecting it.
• Request a technical inspection: If the ICP trips frequently without an apparent cause or with low power use, there could be a fault in your electrical installation. It’s best to call a qualified technician. Having professional support is essential to ensure safety and prevent further damage. If you haven’t yet, why wait to sign up for Endesa’s maintenance and protection services?
• Consider increasing your contracted power: If the switch trips regularly, it may be due to your usual power demand exceeding what you’ve contracted. The solution: ask your energy company for a power increase. Keep in mind that this will raise your bill, so evaluate your current and future energy needs before making a decision.

The ICP is a key component for electrical safety —a silent ally that protects your home and ensures your electrical system operates within contracted limits. If it trips frequently, it’s a warning sign that something isn’t working as it should.

If the switch often activates or you’re unsure about your contracted power, it’s best to contact certified technicians to inspect your installation, check for technical faults, or determine whether your contracted power is insufficient for your needs. We at Endesa offer specialised services to diagnose and ensure the correct operation of your electrical installation, detect faults in the grid, and keep your home protected with a safe, efficient electrical system.