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US 120v vs Europe 220v

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US 120v vs Europe 220v

Postby jb » Wed Apr 21, 2010 3:02 pm

I'm taking a laptop to Italy in May. The power adapter on the cord says it is good for 100v 240v. Does this mean I will need only a plug adapter to fit my US plug into Italian outlets and NOT a converter or transformer? Or will the Gypsies steal it before the battery runs down making the question moot?
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Re: US 120v vs Europe 220v

Postby sunnyd » Wed Apr 21, 2010 3:35 pm

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Re: US 120v vs Europe 220v

Postby SlyckTom » Wed Apr 21, 2010 7:17 pm

Your AC adapter will step down a voltage range of between 100v and 240v and produce an output of usually 19v (this varies wildly these days, but its written on the adapter). The output of the AC adapter will be a constant so long as the voltage input (from the wall) is within specifications (100v-240v). Like sunny said, you just need the wall adapter - no additional transformer is necessary.
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Re: US 120v vs Europe 220v

Postby HouseCrowd » Thu Apr 22, 2010 5:42 am

Yup, as Tom says, it should work fine.

Most laptop power supplies/adaptors/chargers are of the Switched-mode variety these days - as are the power adaptors for many other devices too - so they can accept a wide range of input voltages with little or no change in the heat dissipated.

If the adaptor has a removable power cord though, rather than use an plug adaptor, I'd recommend getting hold of an equivalent European power cord before you go. Plug adaptors can sometimes create a bad/unreliable connection due to the outward shift in weight they cause by moving the plug/cord further away from the socket.
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Re: US 120v vs Europe 220v

Postby jb » Thu Apr 22, 2010 8:43 am

Thanks. Now I have discovered that Italy has both two-pronged and three pronged outlets (grounded). I'm guessing that a two pronged plug will fit in both.
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Re: US 120v vs Europe 220v

Postby sunnyd » Thu Apr 22, 2010 8:51 am

There is a universal plug that has both, you can find them easily online, and I believe even Target sells them if you have a Target near you. A friend of mine in Italy tells me people usually buy and travel with the one that can adapt to both. Not sure where you are staying, or if you are traveling with a female, but most hotels have blow dryers etc., cuz the ones in the USA will work incorrectly if you take them, or you don't have the proper electrical equipment with you to adapt.

http://goitaly.about.com/od/travelpacki ... _italy.htm
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Re: US 120v vs Europe 220v

Postby jb » Thu Apr 22, 2010 2:54 pm

Thanks, that solved my electrical issues. Any advice about the gypsies? :lol:
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Re: US 120v vs Europe 220v

Postby HouseCrowd » Fri Apr 23, 2010 6:01 am

Yes. Learn to talk and dress like The Godfather, and they should leave you alone ;)

jb wrote:I have discovered that Italy has both two-pronged and three pronged outlets (grounded). I'm guessing that a two pronged plug will fit in both.


I would expect so. It's likely that your adaptor is a Class II device (look for the Class II squares symbol on it to confirm). In which case it doesn't require a ground/earth connection.
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