How can you protect computer equipment from power surges?

A power surge can damage your computer, monitor, router or hard drive containing important files. We offer advice on how to protect your computer equipment at several levels and what to look for when choosing solutions.

What is a power surge and how can it damage a computer?

A power surge is a sudden rise in voltage that exceeds the safe level for the electrical installation and connected appliances. It can occur during a thunderstorm, a power cut or when switching on or off appliances that draw a lot of power.

This may result in damage to the computer’s power supply, motherboard, hard drive, monitor, router or other connected devices. The fault is not always immediately apparent. A weaker surge may shorten the lifespan of components, whilst a stronger one may cause the equipment to shut down immediately, necessitating repairs.

A power surge does not necessarily have to reach the computer via a power socket alone. Copper internet, telephone, aerial or other signal cables entering the building may also act as a path for the impulse. Therefore, effective protection should take into account all connections leading to the equipment.

When is the risk of a power surge greatest?

Power surges are primarily associated with storm, but it is not only lightning that can cause them. Risks also arise during power cuts, when power is being restored, or when large power-consuming appliances are switched on or off.

Buildings supplied via overhead power lines and equipment connected to cables extending beyond the building may be particularly at risk.

If a storm is forecast, You can disconnect sensitive equipment beforehand from the mains supply and copper signal cables. However, it is best not to do this once a storm is already nearby.

How can you protect your computer equipment on several levels?

It is worth adopting a layered approach to security. The first layer consists of a correctly installed electrical system with appropriately selected safety devices. The second is the protection located close to the equipment, for example, a surge-protection strip. If you also want to ensure that the system continues to operate in the event of a power cut, you can use an uninterruptible power supply UPS.

Each of these solutions serves a different purpose:

Does a standard power strip with a switch provide protection against power surges?

Not every power strip with several sockets protects equipment from power surges. A standard extension lead with a switch merely distributes the power supply and allows you to switch off all connected devices at the touch of a button. Nor does the presence of an anti-interference filter mean that the product provides surge protection.

A surge-protection power strip contains an additional circuit that limits the energy of a voltage surge. However, its components gradually wear out, particularly following severe surges. As a result, the power strip may continue to supply power to the computer, even though it no longer protects it as effectively as it should. That is why it is worth choosing a model with a protection efficiency indicator, which should be checked regularly. If the indicator goes out or changes colour, you’ll know it’s time to replace the power strip.

How do you choose a surge-protection power strip for your computer?

It is worth noting that:

• protection parameters specified by the manufacturer;
• maximum load on the strip;
• security effectiveness indicator;
• the number and location of sockets;
• cable length;
• connection requirements;
• compliance with the relevant standards;
• recommendations regarding replacement following a power surge or after a specified period of use.

Do not exceed the power rating of the power strip and do not connect several power strips in series. Connect it to a working socket with an earth contact, in accordance with the manufacturer’s instructions. If you have any doubts about the socket or the installation, consult an electrician.

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A surge protector or a UPS – which should you choose?

The choice depends on the type of incident from which you want to protect your equipment.

If you’re keen on final surge protection, and whilst a brief power cut is not a problem, you may need a suitably selected surge-protection strip that works in conjunction with the installation’s safety devices.

A UPS comes in handy when there is a power cut Do you want to save your documents, finish your work or shut down your computer safely?, a NAS or another device. Depending on its design, it may also help to reduce some of the interference present on the network, but it is no substitute for the protection installed in the building.

In some cases, both solutions are required, but they should not be combined haphazardly. It is worth checking the UPS manual to see whether the manufacturer permits the connection of an additional power strip. Many models should be connected directly to a working mains socket.

How can you protect your gaming PC, office PC and home network?

Protecting the computer itself may not be enough if the surge reaches it via the router and a copper Ethernet cable – which is why you need to establish which devices are connected to one another. If you are using a fibre-optic connection, the fibre-optic cable itself does not conduct electricity, but the ONT and router are still powered from the mains.

Do not connect any appliances to the power strip if their combined power consumption exceeds its maximum capacity. High-power appliances, such as a heater or an electric kettle, it should not be connected to the same power strip as the computer.

How can you protect your data in the event of a system failure?

A surge protector and a UPS reduce the risk of equipment damage, but they do not guarantee that data will never be lost. A hard drive may also fail for other reasons, and files may be deleted by mistake, due to malware or if the computer is stolen.

That is why it is a good idea to store important files in several separate locations. The 3-2-1 rule helps with this:

• keep three copies of the data;
• use at least two types of media;
• Keep one copy in a different place from where the computer is located.

This could, for example, be a copy on an external hard drive and another on a suitably secure cloud service.

Where can I buy a surge protector or a UPS?

You can find surge protectors or UPS units in the InPost Mobile app. You can speak to or message the assistant, which devices you want to protect and whether you also want to ensure an uninterrupted power supply.

For example, you could write:

"I'm looking for a surge-protection power strip for my computer, two monitors and a router"

or:

“I want to protect my computer and I need a few minutes of backup power in the event of a power cut.”

By Halsky It will search for the most suitable offers and display them in a clear carousel. It can also compare selected models.

FAQ: How can I protect my computer equipment from power surges?

Does a standard extension lead protect a computer from power surges?

No. An extension lead distributes the power supply, but it does not necessarily have to include a surge protection circuit. Furthermore, the presence of a circuit breaker or an anti-interference filter does not automatically mean that the extension lead provides protection against power surges.

Does the surge protector need replacing?

The power strip’s protective components wear out gradually, particularly following severe power surges. The power strip may continue to conduct electricity even though its protection is not functioning correctly. It is advisable to check the protection indicator and follow the manufacturer’s recommendations regarding replacement.

Can a surge-protection socket strip be connected to a UPS?

Only if the UPS manufacturer permits this. Some instruction manuals require the UPS to be connected directly to an earthed socket. It is not recommended to connect devices yourself.

Does a UPS protect a computer from a lightning strike?

A UPS may limit some surges, but it does not provide complete protection against every effect of a lightning strike. It is not a substitute for surge arresters in the electrical installation or for properly installed building protection.

How do you connect a surge protector so that it works properly?

Connect it in accordance with the instructions to a working socket with an earth contact. Do not connect several power strips together, do not exceed the maximum load, and do not block any ventilation openings. Check the protection indicator and replace the power strip if the manufacturer recommends this following a power surge or if the indicator ceases to show that the protection is functioning correctly.

A few layers instead of a single accessory

Protecting your computer doesn’t end with buying a surge protector. The condition of the electrical installation and the security measures in place within the building are also important, terminal protection on the device and the method of connecting signal cables. A UPS can provide additional power backup, whilst a backup system can minimise the impact of data loss. Each of these solutions addresses a different risk. If you are unsure whether your installation is properly protected, it is worth consulting an electrician.