Do You Really Need a Surge Protector?

Do You Really Need a Surge Protector?

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Back when I didn’t know any better, I thought “surge protector” was synonymous with “power strip,” and I thought “power strip” was just a fancy multi-plug extension cord. Learn from my mistakes: they are not the same things! A surge protector is more than just an apparatus for turning one outlet into six – it plays an important role in electronic device maintenance, such as protecting your laptop.

Why are surge protectors important? Do you need a surge protector? If so, how do you go about selecting one that works for you without blowing huge wads of cash? Keep reading to find out.

How Surge Protectors Work

Before we can define how a surge protector works, we need to define an electrical surge. Think of the flow of electricity as the flow of water running through a pipe. Water moves from one end of a pipe to the other end due to water pressure – water moves from high pressure to low pressure. Electricity operates in a similar way, moving from areas of high electric potential energy to areas of low electric potential energy. In this case, it’s from one end of a wire to the other end.

surge-protector-electrical-grid

Voltage is a measure of this electric potential energy – more specifically, the difference in electric potential energy. When the voltage increases above the norm for at least 3 nanoseconds, it’s called a surge. If the surge is high enough, it can cause wear and tear on your electronic devices, or in severe cases even destroy them.

Let’s go back to the water pipe example. If the water pressure within the pipe is too great, the pipe will burst. The same thing is true for electrical wiring. If the voltage of the wire is too great – meaning the difference in electric potential energy from one end to the other is too high – then the electricity will surge through. This heats up the wire, and if hot enough it can burn, rendering it useless.

The surge protector, then, has one job: detect excess voltage and divert the extra electricity into the grounding wire. This is why all surge protectors will have a grounding pin (the third prong on a plug) and all surge protectors must be plugged into a properly grounded outlet for them to work as intended.

When to Use A Surge Protector

So what causes an electrical surge? Most people think that the main culprit of electrical surging is lightning, but that’s not true at all. Yes, lightning can and does cause electrical surges, but the voltage of lightning is so great that most surge protectors won’t be able to withstand their power. During a lightning storm, the only way to be absolutely sure that your devices won’t be surged is to unplug them.

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surge-protector-airconditioner

The main culprit of electrical surges? Electrical devices that require lots of power to operate. Depending on the wiring of your home, you may notice at times that your lights flicker when powerful devices turn on and off, e.g. your air conditioner. When these devices are switched on, they demand a lot of electricity, which puts a lot of strain on the grid and can cause surges.

When should you use a surge protector? All the time. The real question is really which devices you should connect to a surge protector. You don’t need a surge protector for your desk lamp or your standing fan, but you do want a surge protector for expensive devices that have intricate microprocessors, like computers, televisions, stereo systems, media centers, high-tech kitchen appliances, etc.

Think of it this way: if there was an electrical surge that destroyed all of the devices connected to your outlets, which lost devices would pain you the most? Plug those into a surge protector. It’s better to be safe than sorry.

On an offbeat note, surge protectors can be useful for reducing cable clutter and improving organization with your electronics. All of the cables end up being directed to the same destination, making it much easier for you to handle them all neatly.

Choosing the Right Surge Protector

It can be difficult finding the right surge protector for your needs at a good value, mostly because people don’t talk about it very often. What makes a surge protector good? And why are some surge protectors much more expensive than others? Are there any features you should be looking out for?

surge-protector-indicator

The first thing you’ll want is an indicator light. Do not compromise on this. Surge protectors will not last forever – in fact, even when the surge protector properly diverts a surge so your electronics aren’t damaged, the protector itself can be damaged in the process. An indicator light will let you know that your surge protector is working fine. Is the indicator light not working? Time to buy a new surge protector.

As for protection power, good surge protectors will come with a UL rating, a rating put out by the independent Underwriters Laboratories that tests the safety of electronic devices. Don’t bother with a surge protector that doesn’t have a UL rating. Also make sure that the product is a “transient voltage surge suppressor” as many UL-rated power strips still might not offer surge protection.

And there are a few other considerations to make:

  • Clamping voltage is the voltage measurement that prompts the surge protector to start redirecting the excess electricity away from the plugged-in devices. In other words, a surge protector will a lower clamping voltage will trigger earlier, thus better protecting your devices. Any surge protector with a clamping voltage below 400 volts should be good enough for home use.
  • Joule rating is the maximum amount of energy the surge protector can absorb. If the surge breaches this maximum, the surge protector will be rendered useless. The higher the joule rating, the more energy can be absorbed by the surge protector, so a higher joule rating will often indicate a longer lifespan for the product. For best household protection, you’ll want a surge protector with a joule rating of at least 600.
  • Response time is how long it takes for the surge protector to detect a surge in electricity. A lower response time means a faster response time, which reduces the time that your plugged-in devices are exposed to the surge, thus protecting them better. Ideally, you’ll want a surge protector with a response time of 1 nanosecond or faster.

Recommended Surge Protectors

If you need some help getting started with finding a good surge protector, here are some that I recommend. All of these have a UL rating of 1449, which is what you should be looking for:

  • Maruson SUG-B706NT ($20): A strong 7-outlet surge protector with indicator lights, a clamping voltage of 330V, a joule rating of 720, and a response time below 1 nanosecond. Perfect for an everyday household.
  • Tripp Lite TLP606 ($10): Another strong surge protector with 6 outlets, an indicator light, a clamping voltage of 150V, a joule rating of 790, and a response time below 1 nanosecond.
  • Tripp Lite SPIKECUBE ($6): Here’s an interesting surge protector with only 1 outlet. It has two indicator lights – one for grounded, one for protected. It has a clamping voltage of 150V, a joule rating of 600, and a response time below 1 nanosecond.

Conclusion

The take away? All electrical grids experience electrical surges, some more than others. These surges can damage electronics and surge protectors are there to keep those surges under control as much as possible. You’ll want to use surge protectors for complex and valuable electronics, such as computers, appliances, and media centers. Keep in mind that it’s not enough to have a surge protector; you need one that’s properly rated for your needs.

Do you use surge protectors? If not, why not? Have any interesting electrical surge stories to tell? Please share your thoughts with us in the comments!

Image Credits: Holiday fire safety Via Flickr, Electrical Grid Via Shutterstock, Air Conditioner Via Shutterstock, Surge Protector 2 Via Shutterstock

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Comments (40)
  • Malcolm

    I recently found out that you can buy whole-house surge protectors. In the UK I found one for £46 and it fits easily into a spare slot on the mains consumer unit (main fuse board)

    That means you whole house is protected – every single circuit – lighting, sockets etc for not much more cost that a good quality six-outlet surge protected power strip. And, unlike most surge protected power strips, you don’t throw it away if a power surge occurs, you just have to reset it!

    Most people probably plug their laptop into one of many sockets around the house and with a whole house surge protector all those sockets are protected too – as well as lighting and any other circuits.

    You can also get whole house surge protectors that protect against lightning strikes too but I read you only need this (type 1) surge protector if you have overhead power cables feeding the house and/or you have a lightning rod fitted to your house. As I have neither, I will be going for a type 2/3 device.

    Similarly, if you have overhead telephone lines feeding your property these need to be protected against lightning as well as they can destroy any equipment connected to them.

    UPS (Uninterruptible Power Supplies) may also protect against power surges and the one I am thinking of getting, even offers a guarantee against lightning strikes and can also be reset after a power surge:

    https://www.amazon.co.uk/APC-BE700G-UK-Interface-Power-Saving-Back-UPS/dp/B002RXED6A/

  • wilhelmina

    Hello,
    I am sorry to butt in but I am looking for an outlet extension that has outlets on the sides, for behind my TV. A lot like the Side Socket you see advertised. http://www.shopatshowcasecanada.com/sidesocket.html
    It is called a surge protector, but is it any good? Is it possible to get a surge protector that has outlets on the sides like this?
    I want to plug in my TV, Nintendo Wii, internet modem and internet router. Also my DVD player but it is only used rarely. Is a surge protector even necessary?
    Thank you in advance for any advice.

  • Bytendorp01

    If you were to loose the neutral on your house and have a potential of 240 volts to an outlet would 240 volts smoke a computer? Yes , so how does the computer that is plugged into a surge protector with a clamp of 300 volts get saved? Im confused.

  • Ole Tange

    Neither I nor any of my friends use surge protectors and have never lost any device due to surges.

    Could this be due to the fact that we have excellent wiring (e.g. the light never flickers if we turn on power demanding devices) and an electricity company that has an electricity drop out at most 1 time every 5 years?

    Can you elaborate a bit more on what causes the surges? Is there a way to measure how many surges you have?

    • Joel Lee

      The excellent wiring might have something to do with it. Surges don’t have to be big flashy events, though. Small surges that happen every once in a while can gradually deteriorate the quality and condition of your electronic devices.

      I’m not really qualified to elaborate on the causes or measurements involved with surges, but maybe MUO Answers can help!

  • Paul V

    Great article, I’m buying a couple Tripp Lite TLP606 next week.

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This review may contain affiliate links, which pays us a small compensation if you do decide to make a purchase based on our recommendation. Our judgement is in no way biased, and our recommendations are always based on the merits of the items.

For more details, please read our disclosure.
Affiliate Disclamer

This review may contain affiliate links, which pays us a small compensation if you do decide to make a purchase based on our recommendation. Our judgement is in no way biased, and our recommendations are always based on the merits of the items.

For more details, please read our disclosure.