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What isthe proper amount of joules you would needs in a surge protected powerbar for my laptop, modem and a floorlamp?

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  • ritar2006 Jul 28, 2008

    Thanks guys or gals , very helpful to a non techo, who is learning


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The more the better. This rating determines how much of a surge the bar can surpress, not the load you are putting on it.

Here is a very good article, a bit long, but there is a paragraph about this rating.

Generally, floor lamps do not need surge protection, unless they have some kind of fancy electronic control.

Posted on Jul 26, 2008

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Running my HP laptop computer on a 12dcv to 110acv power inverter

If you are worryed about that,, then just unplug the laptop before you turn over the car. What you have should be ok.

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Surges -- How to keep them from damaging your electronic devices.

Surges give me more than half of my repair jobs,so [1] it is best to simply unplug ALL of your best devices when you expect to be away for awhile, and [2] your purchase of a surge limiter will cost you less than $30 on the net, or less than $40 at Walmart or Lowes, or Home Depot, and be sure to buy a 6' length of coaxial cable at the same time unless you have one hanging around. [They are right now probably in a closet among a whole bunch of stuff that's just barely too valuable to throw away -- stuff that your sweetie has threatened to chuck any minute now.]

Your surge limiter must be rated at 3000 joules or more, and must have at least two shiny threaded 3/8th inch projections on it to accommodate coaxial cables. The limiters are easy to hook up, but you can email to me for freebie coaching if you need to. I am at

Lightning will jump limiters sometimes, and they get tired after 3 or 4 years so must be replaced, but thereafter they remain valuable as power strips. They are far far from being perfectly protective because fragments of lightning strikes jump them and damage them, but they are the best devices that low cost technology has been able to bring to us to date.

[A 'back-up' power supply containing a battery and isolation transformer will be more protective but costs 3 to 6 times as much. You may wish to get more details about them from me, but they should only be considered for VERY expensive or very precious devices.]

Hope this helps.


on Feb 02, 2015 | Bits Limited Smart Power Strip Scg5 W/...


Surge Protection

Here is a few tips to look for in a good surge protector:

1. Response time should be less than 1 nanosecond.

2. Energy absorption/dissipation should be at a rating of 600 joules or more.

3. Clamping voltage should be 330 V to 400 V. Generally, a clamping voltage more than 400 V is too high.

4. Get one with a an indicator light that tells you if the protection components are functioning. All MOVs (Metal oxide varistors (MOV) are semiconductors that protect electronic components and systems from transient voltages) will burn out after repeated power surges, but the protector will still function as a power strip. Without an indicator light, you have no way of knowing if your protector is still functioning properly.

5. Get one that has self test function. A button you push to test it.

on Oct 07, 2010 | Computers & Internet

1 Answer

Monster 1250g does not turn on

Surge protectors either have a switch that trips or a fuse that blows when high current passes through. This is a safety mechanism that protects your appliances from an "electrical surge".

The fuse is most likely blown. you can easily check if the fuse still works with a multimeter. If it isnt, change it and the strip should start working again. ( if u have a reset button on the spike, try hittin that. Im not sure if this model has a fuse or the breaker switch that trips.)

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What is the difference between a regular power strip and a surge protector?

A power strip is what's used for plugging in multiple appliances to one outlet. A surge protector is different in that it is designed to prevent electrical surges from too many things plugged in, bad weather or lightening. Usually things like air conditioners with heavy motors are plugged into surge protectors.

Jan 31, 2013 | Electronics - Others

1 Answer

What is the surge protection in modems. whether

3 wire 120 all three are protected
Phone cord only uses two wire, both are protected.
Surge is only high voltage/amp

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How do i update the pci modem in my acer aspire 3610 pc notebook ...upon startup it shows that the pci modem cannot be found & needs to be reinstalled

Your machine should automatically detected it. go into deveice manager and delete the modem, then press F5. If the modem is not detected or does not work properly it is probably bad. Make sure you have the phone line protected from voltage surge through the phone line.

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Blinking standby light, dead dvd player

Hello illeanaceres,

I'm sorry to hear about the bad news, I had something similar happen to me around a month ago.

Honestly there is not much you can do if it is damaged due to a power surge. Resetting it would be the normal procedure.

Surge protectors only protect equipment up to a certain amount of joules. Basically if the lightning is powerful enough it can damage electronics with that initial surge. You should replace your surge protectors every few years if it is 2-3 years old then it may not be as effective.

Post back if you have anymore questions or comments. Thank you for choosing Fixya!

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Amana bottom freezer refrigerator-

No appliance manufacturer recommends the use of aftermarket surge protectors. They pull high amperage at start and exceeds most protectors. You can have a whole house surge protector installed in your main panel by a licensed electrician. They are the only method that works when serious surges happen.

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First thing I'd check is the powerbar. Did you plug the TV into the outlet direct? What caused the breaker to trip? If it was an overload by using too much current, there is a possibility that there is a loose connection in your house wiring causing arcing and the interiference lines you're seeing on the display. You may even want to try the set in a different outlet if the powerbar checks ok, and if the set then works fine, get an electrican ASAP!

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