Power strip vs surge protector: which one do you need
Power strip vs surge protector: a plain strip only adds outlets, a surge protector also guards against power spikes. Here is when the extra cost is worth it.
Hamza Idrissi2 min read
Is a power strip the same as a surge protector? No. A basic power strip gives you more outlets and nothing else. A surge protector gives you outlets plus parts that try to absorb a short burst of extra voltage, called a surge.
A surge protector typically costs a few dollars more. For a computer or TV, that is cheap cover.
How to tell them apart
Check the box and the casing:
- It should say "surge protector" or "surge suppressor".
- It should list a joule rating. Joules measure how much surge it can soak up. A higher number means more protection, in general.
- It should show a safety mark from a recognized testing body in your country.
- Many have a light that shows protection is on. If the light goes off, the protection may have worn out, so replace the unit.
A plain strip often just says "power strip" or "extension" and lists amps.
One reason to pay the extra
Surges can come from storms or from the grid. They can shorten the life of electronics over time, or damage them at once. The surge protector is the cheap part. The TV or laptop is the costly part.
One exception
Skip the surge protector for a lamp or a phone charger on its own. A plain strip, or just the wall socket, is fine. Also, do not plug heaters, air conditioners or other high-power appliances into any strip. They can overload it. Plug them straight into the wall unless the maker says otherwise.
Never plug one strip into another. That is a fire risk. If you need more outlets, ask an electrician about adding some.
For other small buys that protect your stuff, see things worth buying under $25. If you are choosing between a cheap unmarked strip and a safer one, our walk away signs apply.
Quick questions
How often should I replace a surge protector?
Check the protection light. Many makers suggest replacing after a big surge or after several years. Read the manual for yours.
Does a higher joule rating matter?
In general, yes. A higher rating can soak up more. For a computer or TV, look for a higher number rather than the lowest.
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