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? about voltage & frequency differences- US and japan
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JimDunlop2



Joined: 31 Jan 2003
Posts: 2286
Location: Japan

PostPosted: Tue Mar 08, 2005 11:04 pm    Post subject: Reply with quote

VanKen... Sure... You COULD do that... But that would just be way too easy and make waaay too much sense. Smile
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VanKen



Joined: 29 Oct 2003
Posts: 139
Location: Calgary, AB Canada

PostPosted: Wed Mar 09, 2005 2:28 am    Post subject: Reply with quote

JimDunlop2 wrote:
VanKen... Sure... You COULD do that... But that would just be way too easy and make waaay too much sense. Smile

That's why I merely posed the question, Jim, rather than offering it as advice. Some people here seem to have a lot of time on their hands and would rather go through the effort of cutting off the third prong, destroying a perfectly good cord in the process and making it useless (well, at least dangerous) for use in other countries, etc. but, hey, that's just me.

I'm rather lazy myself and usually opt for the easiest solution to a problem.
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sethness



Joined: 28 Feb 2005
Posts: 209
Location: Hiroshima, Japan

PostPosted: Thu Mar 10, 2005 4:26 am    Post subject: 2-prong, no problem. 3-prong, problem. Reply with quote

You should be able to use any American appliance in Japan, so long as it's a 2-prong plug. If your laptop's plug is 3-prong, but the cord's separate from the rest of the hardware, then you can almost certainly get a replacement 2-prong cord in America or here.

This also applies to desktop PCs...those 3-prong plugs we have in America are easily replaced with 2-prong plugs.

As for the voltage difference between Japan and the US, it's so small as to make hardly any difference. I've freely used in Japan appliances I bought from the Philippines and America.

Coming from Europe, however, is a different story altogether-- you'd need a power adapter (costs about $13 US, 1,500 yen) for sure to change 220v needs into 110volt Japanese wall socket standard. ANd watch the amp requirements...if you're not careful, you may buy a wimpy converter that can't handle the amp-draw of your appliance. In general, 50 amps or better is good for anything in a household.
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Albright



Joined: 01 Nov 2004
Posts: 39

PostPosted: Fri Mar 11, 2005 7:05 am    Post subject: Reply with quote

Indeed, the adaptor makes much more sense than potentially ruining a power strip. In fact, I think my family has one somewhere in this house, because we used to live in an old apartment that didn't have three-prong outlets, but we had a three-prong washing machine... I should have thought of that sooner.

Good thinking, VanKen.
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widget



Joined: 05 Mar 2005
Posts: 10
Location: Edmonton, AB, Canada

PostPosted: Sat Mar 12, 2005 11:34 pm    Post subject: Reply with quote

JimDunlop2 wrote:
In AC current, the polarity (plus/minus) are constantly changing at a rate of 50 or 60 cycles per second (Hertz). If you were to draw this on a graph, you would get a beautiful "sine wave" which peaks at +100V and -100V.


Not that it matters, but if you're talking 100V AC, then the peaks are at ~ +/-141V, since the rating is actually an RMS value... Vrms * sqrt(2) = Vpeak. The "Root Mean Squared" value comes from taking the magnitude of the sine wave, then averaging out the bumps to a constant value.
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