muhasarr
Member
- Location
- United States
What is the difference between Class 2 and Class 3 Transformers? How does this apply to NEC 2014-450.14?
Class 2 vs Class 3 Transformers
- Thread starter muhasarr
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luckylerado
Senior Member
- Location
- Lake of the Ozarks
Class 2 and 3 circuits are governed by Art. 725 and Chapter 9 Table 11A and 11B show some of the differences between them. Lower voltages and wattage ect.. Typically for controls and such. 450.14 wont apply.
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Class 2 is power limited, such that shorting the output terminals won't cause a fire. Class 2 is for doorbells, garage door openers, etc
Class 3 has higher power and voltage limits, and its not a very common system
Class 3 has higher power and voltage limits, and its not a very common system
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