From: Harold Hallikainen <harold@mai.hallikainen.org>
To: Microcontroller discussion list - Public. <piclist@mit.edu>
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Date: Fri, 29 Jan 2021 14:42:40 -0800
Subject: Re: [EE] Connecting european device to US main.
Thread-Topic: [EE] Connecting european device to US main.
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>
> On 2021-01-26 18:07, Richard Prosser wrote:
>> If connecting phase - phase on a US system, you will trip any earth
>> leakage
>> breaker fitted as there will be no neutral current.
>> RP
>
> I don't see how that could possibly be true. There are many 220V
> appliances out there that don't even have a neutral connector on their
> plug.

In the US, GFCIs are typically required in wet areas (kitchen, bathroom,
outdoors) and are 120VAC. I suppose 220VAC GFCIs exist, but I suspect they
are quite rare. But, as Richard pointed out, connecting phase to phase
after 120VAC GFCIs will trip the GFCI since it they look for a difference
between line and neutral.

Summarizing all this, I think you can run European 230VAC equipment from
US 240VAC (phase to phase), but am concerned about a lack of overcurrent
protection in the equipment on one of the lines (that was neutral).

Harold




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