Question

Asked by Doug H from usa | Mar. 23, 2015 10:03

About:Power Plugs / Sockets in China

Is the 220 VAC in China single-ended or are both sides of the 220 V above ground (like US 220 VAC)

The US 220 VAC configuration is where both sides of the line is above 110 VAC above ground. You can measure 110 V from either side of the line to ground, and 220 VAC across them. Does the Chinese system work the same way, or is it more like the 110 V system in the US, where the three wires would be, 220 VAC, Ground for 220VAC, and Earth (Safety Ground)? If it is like this, then there is 0 volts between the earth ground and the low side of the 220 VAC.

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Answers (3)

Answered by Lee | Mar. 24, 2015 01:22

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Doug, there are usually live line, null line and earth line. There is a voltage between the live and null lines, and live and earth lines. However, there is no voltage between earth and null lines.

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Answered by Doug H | Mar. 24, 2015 07:08

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Lee, Thank you for confirming my suspicions. I bought a small Chinese water heater from banggood.com that was designed for use with 220 VAC. I want to modify it to run on 110V, so now I know exactly what I am dealing with. Next step is to trace out the circuit board to see what limits operation to 220V.

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Answered by Lee | Mar. 24, 2015 22:34

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Doug, is it really so complicated? You may check its voltage carefully. If its range is from 110V to 240V, I think you can use it directly without modifying it. You know, some of my friends study in USA. They just buy adaptors for the plugs. Most appliances have already supported a voltage from 110 to 240V.

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