GFCI question

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mccorb

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Here is a GFCI that is rated for 250V.


My question is: Can this GFCI be used to protect a 120v circuit even though it is rated for 250v? I'm thinking the answer is yes otherwise it would be specified for 220v not 250v but I want to make sure.

Note to anyone else looking at this thread: This is a 30mA GFCI and not appropriate for protecting people. For protecting people you need a 9mA GFCI.
 
 
I was thinking you couldn't use it as 120V simply because there would be no need to have 120V units. Interesting that the diagram on both show a neutral and the same hookup.

Here is the 240v unit. Shows a neutral. I am not sure if there are systems around that are 240v neutral to hot.

1670595413488.png
 
I think they are prevalent in Europe etc. However my question was more general. I just want to know if GFCIs rated for 240v will work fine for 120. Most equipment I look at has a 600v rating which means you can use it for anything 600v or less. Not sure about GFCIs though.
 
mccorb said:
I think they are prevalent in Europe etc. However my question was more general. I just want to know if GFCIs rated for 240v will work fine for 120. Most equipment I look at has a 600v rating which means you can use it for anything 600v or less. Not sure about GFCIs though.
Click to expand...
What is shown is not GFCI, it is a GFPE in the US. Both UL and the NEC, as well as agencies like OSHA, reserve the acronym GFCI for devices that operate at a nominal 6mA of current for protecting personnel.

In general ground section devices as shown compares the amount of current that flows into the device versus the amount flowing out and so are basically voltage insensitive. However their test circuitry is likely to be designed for specific voltages making this one unusable with a L-L of 120V.
 
jim dungar said:
What is shown is not GFCI, it is a GFPE in the US. Both UL and the NEC, as well as agencies like OSHA, reserve the acronym GFCI for devices that operate at a nominal 6mA of current for protecting personnel.

In general ground section devices as shown compares the amount of current that flows into the device versus the amount flowing out and so are basically voltage insensitive. However their test circuitry is likely to be designed for specific voltages making this one unusable with a L-L of 120V.
Click to expand...
In European systems aren't they called LCD's and typically are 30mA trip setting? Otherwise about the same thing that we call GFPE here.
 
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