Class A device definition

Merry Christmas
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hbemsa

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On Article 100 Definition, under Ground Fault Circuit interrupter, NEC refers to Class A devices. Other international codes refer also to General Class devices.
Can anyone explain the difference and where in the NEC is explained tihs differece? I believe this "Class" subdivision is not only applied to GFCIs but to many other electrical devices used in installations.

In the GFCI case, some international codes based not on NEC but IEC allow for operation of "General Class" interrupters in the 30 mA range. NEC did not even mention the General Class.

Is there any other Classes of devices?
 
There was at one time a Class B GFCI device used for swimming pools. I believe the trip rating was between 20-30 ma. Class A GFCI devices have a trip rating of 4-6 ma.
 
A Class B GFCI with a 20 milliamp trip level is to be used only for protection of underwater swimming pool lighting fixtures installed before adoption of the 1965 National Electrical Code
 
Now that is instering to know that but i did heard about the class B GFCI but not in full defiation until now i can see what you mean with this.

Learn something new everyday

[ I am famuair with French GFCI system they are diffrent than what we have but that diffrent story i will leave this out for now unless you are instering to know what between the USA/Canada system VS. European system is ]

Merci, Marc
 
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