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The plug claims to be 12A 250V, so I think its a NEMA 6-15R or 6-30R which handle 15 or 30 volts respectively.

Here is a picture of the outlet:


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I vote for hot/ground/neutral with the ground being the round pin – ratchet freak May 22 '12 at 7:23
A voltmeter with 1 probe in the ground pin will tell you. – Jay Bazuzi May 22 '12 at 16:31

It looks like the Philippines uses a system similar to Europe, so it would be 1 hot ( 240V @60 Hz.), 1 neutral, and a ground.

Typical Worldwide Voltages

Japan, Taiwan, North America and some parts of northern South America.

100 - 120/240V ± 5% @ 60 Hz.

Europe, Africa, Asia, Australia, New Zealand and most of South America

230V ± 6% @ 50 Hz.

Here is a map of voltages and frequencies around the world from Wikipedia.

Worldwide Voltages and Frequencies

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Actually, the standard outlet in the Philippines is 220 Volts, and a two prong plug, as stated here: bohol.ph/article68.html. I don't have a picture of the standard 2 prong 220v outlets, but they will take flat and round prong plugs. The plug on the air conditioner is labeled 250v, so unlike the article I linked to, I don't think its 110v. – Justin Dearing Jun 3 '12 at 2:32
@JustinDearing Huh? that's what I said. Philippines is 220V (hot/neutral/ground), not 110V. – Tester101 Jun 3 '12 at 22:09
The Standard Philippine outlet is a 2 prong hot/neutral outlet. It either takes a US type 2 prong parallel slit plug, or round plugs as illustrated here. The Outlet I have shown in the screenshot seems to only be used for wall mounted Air Conditioners (in my limited experience) and appears to be a NEMA 6-15R or 6-30R as I will update my question to reflect. – Justin Dearing Jun 3 '12 at 22:20

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