class 1, 2, or 3 power limited circuit

[wyboy]

How can you tell if a transformer or other device is a class 1, 2, or 3 power limited circuit power source? Is there any wattage limitation between class 1 and class 2?

 

[raider1]

The transformer should be marked with what class power supply it is.

Chris

 

[jim dungar]

Simply being small in size does not make a transformer power limiting. I would want to see proof (i.e. a listing) that it was designed for Class 2 applications.

 

[don_resqcapt19]

Take a look at Tables 11A & B in Chaper 9 for some information, but I think even if the comply with the table, the power supplies must still be listed as a Class 2 or 3 power supply.

 

[Pierre C Belarge]

Take a look at:
725.41(A)(1)-(5) - '05
725.121(A)(1)-(5) - '08